RM85.00

  It is a customized version of the classic ARDUINO MEGA R3 board, A.K.A RobotDyn MEGA+WIfi. Full integration of microcontroller Atmel ATmega2560 and IC Wi-Fi ESP8266 with 32 MB flash memory, and USB-TTL converter CH340G on one board. All modules can work together or independently.   Specifications Microcontroller ATmega2560 IC Wi-Fi  ESP8266 USB-TTL converter CH340G Power Out 5V-800mA Power IN. USB 5V (500mA max.) Power IN. VIN/DC Jack 9-24V Power Consumption 5V 800mA Logic Level 5V Wifi Wi-Fi 802.11 b/g/n 2.4 GHz USB Micro USB Clock Frequency 16MHz Operating Supply Voltage 5V Digital I/O 54 Analog I/O 16 Memory Size 256kb Data RAM Type/Size 8Kb Data ROM Type/Size 4Kb Interface Type serial\OTA Operating temperature −40С°/+125С° Length×Width 53.361×101.86mm antenna Buil-in\external antenna   Jumper On the board where the switch of mode of operation with 8 position   1 2 3 4 5 6 7 8 CH340 connect to ESP8266 (upload sketch) OFF OFF OFF OFF ON ON ON NoUSE CH340 connect to ESP8266 (connect) OFF OFF OFF OFF ON ON OFF NoUSE CH340 connect to ATmega2560 (upload sketch) OFF OFF ON ON OFF OFF OFF NoUSE CH340 connect to Mega2560 COM3 connect to ESP8266 ON ON ON ON OFF OFF OFF NoUSE Mega2560+ESP8266 ON ON OFF OFF OFF OFF OFF NoUSE All modules work independent OFF OFF OFF OFF OFF OFF OFF NoUSE   Also, have switch for change of connecting port between ATmega2560 and ESP8266 After choosing the mode of the board can proceed to set up the IDE It is important that when the ESP8266 module is programming, it is necessary to press the button “Mode” To begin open the Arduino IDE programming environment and go to settings Then in the window that appears in the row, Additional Boards Manager URLs (marked in red) insert http://arduino.esp8266.com/stable/package_esp8266com_index.json link for installation in Arduino IDE additional scripts that would work with the modules ESP8266 and click OK Then go to the Tools> Board> Boards Manager In the window that appears, scroll through the list down to the script esp8266 by ESP8266 Community and click. In the lower right corner will be able to select the version of the software, select the version 2.1.0 (the newest) and click the Install button After installation, close the window and go to Tools> Board and see the list of available devices on the chip programming ESP8266 Next, you need to select the card as shown in the picture (Generic ESP8266 module) Select the upload speed - 115200   Arduino sketch for test ==========test sketch for ATmega2560=========== void setup() { Serial3.begin(115200); pinMode(13,OUTPUT); delay(500); Serial3.println("AT+CIPMUX=1"); delay(2000); Serial3.println("AT+CIPSERVER=1,5000"); delay(2000); Serial3.println("AT+CIPSTO=3600"); delay(2000); } void loop() { while(Serial3.available()) { char Rdata; Rdata=Serial3.read(); if(Rdata=='A'|Rdata=='a') { digitalWrite(13,HIGH); delay(50); } else if(Rdata=='B'|Rdata=='b') { digitalWrite(13,LOW); delay(10); digitalWrite(13,HIGH); delay(10); digitalWrite(13,LOW); } else { digitalWrite(13,LOW); } } }  

RM130.00

​ Resolution: 480 x 320 pixel Controller: ST7796S   Package Includes 1 x Touch Screen Module 1 x Stylus Pen  

RM6.00

  Nozzle is the part on the 3D printer that actually extrudes the filament to build the part. MK8 printer nozzels, one of each size 0.2/0.3/0.4/0.5mm. Ideal for printing 1.75mm ABS or PLA.  Nozzles are made of high quality brass.   Specifications Size: 13 x 6mm Material: Brass Nose Length: Short-nosed Nozzle widths: Narrow-nosed Compatible: Makerbot  

RM8.00

  When the piezoelectric ceramic shocking will generate an electrical signal, for Arduino Controller analog port can be perceived slight vibration signals, Also can be vibration interactions related works, such as electronic drums.   Descriptions Working Voltage: 3.3V or 5V Working Current: Less than 1mA Operating Temperature Range: -10 ~ + 70 Degrees Celsius Interface Type: Analog Output Item Size: 30mm x 23mm   Pins S signal output + power supply (VCC) - ground (GND) Input Positive of the piezoelectric ceramic GND Negative of the piezoelectric ceramic    Package Included 1 x Piezo Sensor 1 x Signal Amplifier Module   How to use Analog_Piezoelectric_Ceramic_Vibration_Sensor  

RM48.00

multifunction delay relay module.LCD display, very clear, easy to use, powerful.It can be widely used at Smart home,Industrial control,Automatic irrigation,Indoor ventilation.Protection equipment.   Applications Motor Robot Smart home Industrial control Automatic irrigation Indoor ventilation Features LCD display Support high and low level trigger Support button trigger Emergency stop function Sleep mode,Wake up with any button Automatically save parameters Support UART Set Independent of parameters With case, beautiful and practical Support reverse connection protection Delay high precision Continuously adjustable from 0.01 seconds to 9999 minutes Optocoupler isolation.Enhanced anti-jamming capability Multiple parameters are displayed simultaneously   Specifications Product Number: XY-WJ01 Working Voltage: DC 6V – 30V Load Current: 10A(Max) Timing Range: 0.01 sec ~ 9999 min Idle Current: 15mA Working Current: 50mA Maximum Output load: DC 30V 5A and AC 220V 5A Service life: more than 100,000 times;  Working temperature: -40~85℃ Operating Humidity: 5%-99%RH Trigger signal source: High trigger (3.0V~24V) Low trigger (0.0V~0.2V) Switching control (passive switch) Reverse Protection: Yes Physical Dimension: 79*44*26mm   Functions Trigger delay Module will began to delay after get a trigger signal.And output terminal status will change after delay.This function can be used in circuit protect form misoperation or prevent instantaneous high current. Cycle timing The load switch changes state according to the specified time after set cycle time. Delayed power off If use need control a light that need it power off after some time.This module can meet this function. Circuit switch Protect the circuit from damage caused by prolonged operation.   Working mode P0: Relay will keep ON for time OP after get trigger signal and then relay OFF;The input signal is invalid if get trigger signal again during delay time OP. P1: Relay will keep ON for time OP after get trigger signal and then relay OFF;Module will restart delay if get trigger signal again during delay time OP. P2: Relay will keep ON for time OP after get trigger signal and then relay OFF;Module will reset and stop timing if get trigger signal again during delay time OP. P3: Relay will keep OFF for time CL after get trigger signal and then relay keep ON. P4: Relay will keep ON for time OP after get trigger signal and then relay keep OFF for time CL and then loops the above action.Module will reset and stop timing and relay will keep initial state if get trigger signal again during loops.The number of cycles (LOP) can be set.Relay will keep OFF if end loop. P5: Relay will keep OFF for time CL after get trigger signal and then relay keep ON for time OP and then loops the above action.Module will reset and stop timing and relay will keep initial state if get trigger signal again during loops.The number of cycles (LOP) can be set.Relay will keep ON if end loop. P6: Relay will keep ON for time OP after power on without get trigger signal and then relay keep OFF for time CL and then loops the above action.The number of cycles (LOP) can be set.Relay will keep OFF if end loop. P7: Relay will keep OFF for time CL after power on without get trigger signal and then relay keep ON for time OP and then loops the above action.The number of cycles (LOP) can be set.Relay will keep ON if end loop. P8: Signal hold function.Reset delay time and relay keep ON if keep get trigger signal.Relay OFF when the signal disappears after delay time OP.Reset delay time when get trigger signal again during timing. P9: Signal hold function.Reset delay time and relay keep OFF if keep get trigger signal.Relay ON when the signal disappears after delay time CL.Reset delay time when get trigger signal again during timing P0~P7 mode: System will start to delay if short press button ‘Pause’ when system does not get trigger signal.Display screen will display ‘OUT’ and flashing and Relay OFF when Pause timing if the system has been timed. P8~P9 mode: Other buttons cannot be used when ‘Pause’ button as a trigger signal in running interface.   Timing Range Continuously adjustable from 0.01 seconds to 9999 minutes. Enter the settings interface when short press button ‘Pause’ in the OP / CL parameter modification interface(Flashing) to select timing range. Pay attention to the position where the decimal point moves when the button is pressed. Display ‘XXXX’. No decimal point, the timing range is 1 second ~ 9999 seconds. Display ‘XXX.X’. The decimal point is the penultimate, timing range is 0.1 second to 999.9 seconds. Display ‘XX.XX’. The decimal point is the third last, timing range is 0.01 second to 99.99 seconds. Display ‘X.X.X.X’. The decimal point is fully lit, timing range is 1 minute to 9999 minutes. For example, if you want to set the OP to 3.2 seconds, move the decimal point to the penultimate position, LCD will display ‘003.2’. Description OP: Turn On time; CL: Turn OFF time; LOP: Number of cycles.Range is 1-9999tims.’----’ means unlimited loop. Setting Long press:keep press button for more than 3second. 1 Enter set parameter menu by long press button 'SET'. 2 Work mode will flash at first set the working mode.Short press the UP/DOWN button to set the working mode. 3 Short press the SET button to select the working mode and enter the system parameter settings. 4 In the system parameter setting interface, short press the ‘SET’ button to switch the system parameters to be modified, short/long press the UP/DOWN button to modify value; Note:Short press ‘SET ’ is invalid at mode P0,P1,P2,P3,P7,P8. 5 Enter setting interface when short press button ‘Pause’ in the OP/CL parameter modification interface(Flashing) to select timing range (1s/0.1s/0.01s/1min). 6 Save the parameter settings and exit the settings interface when long press ‘SET’ button after all the parameters are set.   Additional Features Auto sleep function: Long press button 'Pause' in the normal running interface(P0~P7) to turn on or off auto sleep function. L-P:ON,Turn ON auto sleep function.About five minutes, no operation, the LCD backlight automatically turns off.It can be wake up by any buttons. L-P:OFF,Turn OFF auto sleep function. View parameters: In the running interface, short press the SET button to display the current parameter settings of the system, which does not affect the normal operation of the system. Switch the display parameter: It will switch the display content by short press button 'DOWN' in the P5~P6 mode(Parameter is Run time or number of cycles)   UART Communication and Parameter Settings The system supports UART data upload and parameter setting functions (TTL level); UART: 9600, 8, 1 NO.    Command    Function 1    Read    Read the parameter setting 2    OP:XXXX    Set the minimum delay time for turn ON : 1s 3    OP:XXX.X    Set the minimum delay time for turn ON : 0.1s 4    OP:XX.XX    Set the minimum delay time for turn ON : 0.01s 5    OP:X.X.X.X    Set the minimum delay time for turn ON : 1min 6    CL:XXXX    Set the minimum delay time for turn OFF : 1s 7    CL:XXX.X    Set the minimum delay time for turn OFF : 0.1s 8    CL:XX.XX    Set the minimum delay time for turn OFF : 0.01s 9    CL:X.X.X.X    Set the minimum delay time for turn OFF : 1min 10    LP:XXXX    Number of cycles:1-9999 11    Start    Trigger/Start(Just for P0~P7) 12    Stop    Pause(Just for P0~P7) 13    PX    Set mode P0~P9   Note This is a relay output and cannot be used as a power module. It cannot output voltage. The load needs to be connected to a separate power supply.   Package 1pcs XY-WJ01 Delay Relay Module   ---------------------------------------------------------------------- ----------------------------------------------------------------------  

RM12.00

UK IEC Power Cord with C19 to BS 1363 Connection for Powering Network Devices This BS 1363 power cord is designed for blade server chassis, switches, routers, PDUs, UPS systems and other network devices. It features a BS 1363 plug for connecting to a wall outlet and a C19 plug for connecting to a device. The length allows you great flexibility in placing equipment with respect to the power outlet.   Features BS1363 to C13 cable for powering computers, servers and other network devices 6 ft. (1.8 m) length allows flexibility in placing devices in relationship to AC outlet Ideal replacement for worn-out or missing kettle, computer, any electronics power cable Included a 13A fuse    

RM28.00

UK IEC Power Cord with C19 to BS 1363 Connection for Powering Network Devices This BS 1363 power cord is designed for blade server chassis, switches, routers, PDUs, UPS systems and other network devices. It features a BS 1363 plug for connecting to a wall outlet and a C19 plug for connecting to a device. The length allows you great flexibility in placing equipment with respect to the power outlet.   Features Recommended for powering switches and other network devices BS 1363 plug connects to AC power; C19 plug connects to device’s C20 inlet UK power cable is ideal for a replacement for worn-out or missing cord 1.8 meters length allows you greater freedom in placing devices away from outlet    

RM28.00

C20-to-C19 Power Cable for Network Devices That Require a Heavy-Gauge Connection This heavy-duty extension cord features 14 AWG wire suitable for high power connections, making it a reliable solution for large server applications that require a higher-rated, heavier-gauge cable. This cord can be used to connect a server, router, network switch or blade server enclosure to a UPS system or PDU or replace or upgrade the standard power cord provided by the device’s manufacturer. The length helps reduce cable clutter and minimize the risk of tripping.   Features Recommended for powering servers, routers and other high-output network devices 1.8 meters length allows flexibility in placing devices, while avoiding cable clutter C20 to C19 cord replaces or upgrades standard power cord provided by manufacturer Thick 14 AWG wire gauge manages high power levels required for larger equipment    

RM28.00

C19 to C14 Power Cord for Network Devices That Require a Heavy-Gauge Connection This C14 to C19 cable features 14 AWG wire suitable for high power connections, making it a reliable solution for large server applications that require a higher-rated, heavier-gauge cable. The C14 to C19 power cable can be used to connect a computer, server or drive to a UPS system or PDU or replace or upgrade the standard power cord provided by the device’s manufacturer. The length helps reduce cable clutter and minimize the risk of tripping.   Features C19 to C14 cable for powering computers, servers and other network devices 1.8 meters allows flexibility in placing devices, while avoiding cable clutter Heavy-duty cable replaces or upgrades standard power cord provided by manufacturer Thick 14 AWG wire gauge manages high power levels required for larger equipment    

RM58.00

Widely used in general industry equipment, medical equipment, chemical equipment, farming (lawn and garden), tour vehicles, special vehicle, ship, beverage, vehicle cleaning, carpet cleaning, ground cleaning, water purification and water treatment equipment.   Features High-temperature protection High pressure Low power consumption Long life span     Specifications Maximum flow: 4 Liter per Minute Maximum pressure: 1MPa Maximum current: 3.5A Water Inlet & Outlet Diameter: 9mm Rated voltage: DC 12V Working voltage: DC 9 – 14.4V Power consumption: 45W Maximum working temperature: ≤ 50°C Size: 15.7cm x 9.5cm x 6cm.    

RM330.00

Raspberry Pi 4 Model B is the latest product in the popular Raspberry Pi range of computers. It offers ground-breaking increases in processor speed, multimedia performance, memory, and connectivity compared to the prior-generation Raspberry Pi 3 Model B+, while retaining backwards compatibility and similar power consumption. For the end user, Raspberry Pi 4 Model B provides desktop performance comparable to entry-level x86 PC systems. This product’s key features include a high-performance 64-bit quad-core processor, dual-display support at resolutions up to 4K via a pair of micro-HDMI ports, hardware video decode at up to 4Kp60, up to 4GB of RAM, dual-band 2.4/5.0 GHz wireless LAN, Bluetooth 5.0, Gigabit Ethernet, USB 3.0, and PoE capability (via a separate PoE HAT add-on). The dual-band wireless LAN and Bluetooth have modular compliance certifcation, allowing the board to be designed into end products with signifcantly reduced compliance testing, improving both cost and time to market.   So what's new? New Raspbain Software (Debian 10 Buster) Encapsulated processor Cortex A-72 USB 3.0 type C Ethernet Broadcom BCM54213PE on a separate bus to the USB traffic Bluetooth 5.5 and Bluetooth LE LPDDR4 SDRAM Since the new pi changes the full HDMI interface into two micro HDMI ports, so you may need this Micro HDMI to HDMI Adapter to work with your HDMI display.   Features Broadcom BCM2711, Quad core Cortex-A72 (ARM v8) 64-bit SoC @ 1.5GHz 1GB, 2GB or 4GB LPDDR4-2400 SDRAM (depending on model) 2.4 GHz and 5.0 GHz IEEE 802.11ac wireless, Bluetooth 5.0, BLE Gigabit Ethernet 2 USB 3.0 ports; 2 USB 2.0 ports. Raspberry Pi standard 40 pin GPIO header (fully backwards compatible with previous boards) 2 × micro-HDMI ports (up to 4kp60 supported) 2-lane MIPI DSI display port 2-lane MIPI CSI camera port 4-pole stereo audio and composite video port H.265 (4kp60 decode), H264 (1080p60 decode, 1080p30 encode) OpenGL ES 3.0 graphics Micro-SD card slot for loading operating system and data storage 5V DC via USB-C connector (minimum 3A*) 5V DC via GPIO header (minimum 3A*) Power over Ethernet (PoE) enabled (requires separate PoE HAT) Operating temperature: 0 – 50 degrees C ambient Supports Raspbian, Windows 10 IoT Core, OpenELEC, OSMC, Pidora, Arch Linux, RISC OS and More!     Software installation Beginners should start with the NOOBS (New Out Of Box Software) operating system installation manager, which gives the user a choice of operating system from the standard distributions. SD cards with NOOBS pre-installed should be available from any of our global distributors and resellers. Alternatively, you can download NOOBS. Raspbian is the recommended operating system for normal use on a Raspberry Pi. You can browse basic examples to help you get started with some of the software available in Raspbian, find more detail about the Raspbian operating system, or read information on fundamental Linux usage and commands for navigating the Raspberry Pi and managing its file system and users.   Comparison with Pi 3+ Spec Raspberry Pi 4 B Raspberry Pi 3 B+ CPU 1.5-GHz, Quad-Core Broadcom BCM2711B0 (Cortex A-72) 1.4-GHz, Quad Core Broadcom BCM2837B0  (Cortex A-53) RAM 1 - 4GB DDR4 1GB DDR2 GPU 500 MHz VideoCore VI  400 MHz VideoCore IV Video Out dual micro HDMI ports single HDMI port Max resolution 4K 60 Hz + 1080p or 2x 4K 30 Hz 2560 x 1600 USB Ports 2x USB 3.0 / 2x USB 2.0 4x USB 2.0 Wired Networking Gigabit Ethernet 330 Mbps Ethernet Wireless 802.11ac (2.4 / 5 GHz), Bluetooth 5.0 802.11ac (2.4 / 5 GHz), Bluetooth 4.1 Charging Port USB Type-C micro USB Power Requirement 3A, 5V 2.5A, 5V Size 3.5 x 2.3 x 0.76 inches (88 x 58 x 19.5mm) 3.2 x 2.2 x 0.76 inches (82 x 56 x 19.5mm) reviews/raspberry-pi-4-b,6193.html  

RM110.00

You can turn on/off the receiver with transmitter (remote control) from any place within a reliable distance; the wireless RF signal can pass through walls, floors and doors. Control Lights, Motors, Fans, electrically operated Doors/Locks/Windows/Blinds/Cars or Other Appliances with DC12V.   Wireless Receiver Controller Channel: 12 Channel Operating voltage: DC12V Operating temperature: -40℃ ~ +80(℃) Receiving sensitivity: ≥-105dBm Case Dimension: 74 x 53 x 30mm Receiving distance: 100 – 200m (200m max for open space)   SELECT OPERATING MODE Press the button on receiver board until LED blink once then release. Press remote button 1 button now for latching mode Press remote button 2 button once for momentary mode Press remote button 3 button for interlock mode Press remote button 4 button for semi latching (1 ~ 6) & semi momentary (7 ~ 12) mode Press remote button 5 button for semi latching (1) & semi momentary (2 ~ 12) mode Long press button on receiver board around 8 second (Long beep from buzzer) will clear the receiver board memory; After this will require to pair with any remote again, maximum can pair up-to 30 remote control.   PROGRAM MODE IN Momentary = Single relay will stay on only as long as the certain remote button is pressed. Latching = Press any remote button for on, press same key again for off, each relay independently on/off. Interlock = Only one relay will on; press another button for on another relay and pervious relay will turn off. Package Included 1 x Receiver 1 x Transmitter      

RM78.00

You can turn on/off the receiver with transmitter (remote control) from any place within a reliable distance; the wireless RF signal can pass through walls, floors and doors. Control Lights, Motors, Fans, electrically operated Doors/Locks/Windows/Blinds/Cars or Other Appliances with DC12V.   Wireless Receiver Controller Channel: 6 Channel Operating voltage: DC12V Operating temperature: -40℃ ~ +80(℃) Receiving sensitivity: ≥-105dBm Case Dimension: 74 x 53 x 30mm Receiving distance: 100 – 200m (200m max for open space)   SELECT OPERATING MODE Press the button on receiver board until LED blink once then release. Press remote button 1 button now for latching mode Press remote button 4 button once for momentary mode Press remote button 2 button for interlock mode Press remote button 3 button for semi toggle (1,2,3) & semi momentary (4,5,6) mode Long press button on receiver board around 8 second (LED blink twice) will clear the receiver board memory; After this will require to pair with any remote again.   PROGRAM MODE IN Momentary = Single relay will stay on only as long as the certain remote button is pressed. Latching = Press any remote button for on, press same key again for off, each relay independently on/off. Interlock = Only one relay will on; press another button for on another relay and pervious relay will turn off. Package Included 1 x Receiver 1 x Transmitter    

RM150.00

Galvanic skin response (GSR), also referred to as skin conductance response (SCR) or electrodermal activity (EDA), is the property that momentarily makes our skin a better conductor of electricity when we are physiologically aroused. When we are aroused, a number of body processes get activated – for instance, our heart beats faster and pulse rise. We also sweat more, and as we sweat, our skin conductance increases. So, GSR is essentially triggered by sweating, and is measured in micro-Siemens (µS) or micro-Mho (µM). (It is actually a more complex phenomenon, particularly in light of recent research findings. Practitioner’s, however, need not get into the finer details). Arousal is one of the two main dimensions of emotion, the other being valence. GSR can capture emotional arousal, or the level of stimulation, and this makes it a strong predictor of attention and memory. It does not reveal emotional valence, i.e. it is unable to detect whether we are feeling good (positive) or whether we are feeling bad (negative). In this respect, GSR and facial coding are complementary. Facial coding captures the valence of emotion, but cannot gauge the associated arousal. Since sweat secretion cannot be consciously controlled, GSR is able to track autonomic arousals. This is what makes it a non-deceptive indicator of our emotions. It also explains its use along with other technologies, in lie-detectors. The other prime advantage is that GSR is relatively inexpensive and easy-to-measure, requiring fairly simple devices.   Features Detects conductance of skin Finger Straps for electrodes Measurable Skin Resistance Conductivity Working Voltage: 3.3 / 5VDC   Packing List 1 x Finger Glove with sensor 1 x GSR sensor module 1 x Leadwire(female to female)  

RM16.00

Features Compatible WeMos, ESP, Raspberry, Arduino Battery protection (Overcharge or Over-discharge) Input port: Micro USB Charging current: 0.5A Input Voltage: 5 ~ 8VD Output: Type-A USB 3V & 1A 5V & 2A 3V output solder pin x3 5V output solder pin x3 1 on/off switch for control USB output   Caution   Do not ever put in battery in reverse polarity as this will cause the charging chip burn!     Package included 1 x Battery Shield    

RM30.00

  A soil moisture sensor can read the amount of moisture present in the soil surrounding it. It's a low tech sensor, but ideal for monitoring an urban garden, or your pet plant's water level. This is a must have tool for a connected garden! This sensor uses the two probes to pass current through the soil, and then it reads that resistance to get the moisture level. More water makes the soil conduct electricity more easily (less resistance), while dry soil conducts electricity poorly (more resistance). It will be helpful to remind you to water your indoor plants or to monitor the soil moisture in your garden. The IO Expansion Shield is the perfect shield to connect this sensor to Arduino. Soil moisture sensor uses Immersion Gold which protects the nickel from oxidation. Electroless nickel immersion gold (ENIG) has several advantages over more conventional (and cheaper) surface platings such as HASL (solder), including excellent surface planarity (particularly helpful for PCB's with large BGA packages), good oxidation resistance, and usability for untreated contact surfaces such as membrane switches and contact points. Specification   Voltage: 3.3 – 12VDC Working Current: <20mA Output <30mA Output interface: DO: digital AO: analog Size: 36 * 15 * 7mm

RM55.00

  Features Concurrent reception of up to GNSS (GPS/QZSS, GLONASS) Able to use GPS as a really accurate clock, this board provides a PPS (pulse per second) signal. This is a highly accurate clock pulse coming off a pin on the GPS that NTP can use. If you have such a GPS the resource below is a must read. Compact and excellent performance Micro USB port, you can use general mobile phone cable to connect this GPS module to your computer. No need USB-TTL, convenient for use Onboard ceramic passive antenna, able to search for the satellite in open area, and an external antenna is optional SMA port, convenient for connecting with the external active antenna, stronger satellite search ability A reserved TTL port, convenient for connecting to USB-TTL or external single chip microcomputer Back-up rechargeable battery UART TTL socket EEprom to save configuration settings Support hot start     * PPS should be connected to the clock pulse output (CPOUT) of a MCU. This pin is unconnected if GPS module is connected to a computer.     Connect to an Arduino /* Connection to UNO VCC - Arduino 5v GND - Arduino GND TXD - Arduino D0 RXD - No connect PPS - No connect If want to use this on Leonardo, have to rename all the "Serial" to "Serial1" */ char nmeaSentence[68]; String latitude; //Latitude String longitude; //Longitude String lndSpeed; //Speed String gpsTime; //UTC time, Kuala Lumpur is 8 String klTime; //KL Time #define GPSSerial Serial void setup() { GPSSerial.begin(9600); GPSSerial.println("ILoveMCU.taobao.com"); GPSSerial.println("Wating..."); } void loop() { // For one second we parse GPS data and report some key values for (unsigned long start = millis(); millis() - start < 1000;) //Scan for GPS each second { while (GPSSerial.available()) //Serial reading { char c = GPSSerial.read(); //Serial reading switch(c) // { case '$': //data divided by $ GPSSerial.readBytesUntil('*', nmeaSentence, 67); //Store data in nmeaSentence //Serial.println(nmeaSentence); latitude = parseGprmcLat(nmeaSentence); //Get Latitude longitude = parseGprmcLon(nmeaSentence); //Get Longitude lndSpeed = parseGprmcSpeed(nmeaSentence); //Get Speed gpsTime = parseGprmcTime(nmeaSentence); //Get GPS time if(latitude > "") //Print if not null { GPSSerial.println("------------------------------------"); GPSSerial.println("latitude: " + latitude); } if(longitude > "") //Print if not null { GPSSerial.println("longitude: " + longitude); } if(lndSpeed > "") //Print if not null { GPSSerial.println("Speed (knots): " + lndSpeed); } if(gpsTime > "") //Print if not null { GPSSerial.println("gpsTime: " + gpsTime); klTime = getklTime(gpsTime); //KL Time GPSSerial.println("klTime: " + klTime); } } } } } String getklTime(String s) { int hour = s.substring(0,2).toInt(); int minute = s.substring(2,4).toInt(); int second = s.substring(4,6).toInt(); hour += 8; if(hour > 24) hour -= 24; s = String(hour) +":"+String(minute) +":"+ String(second); return s; } //Parse GPRMC NMEA sentence data from String //String must be GPRMC or no data will be parsed //Return Latitude String parseGprmcLat(String s) { int pLoc = 0; //paramater location pointer int lEndLoc = 0; //lat parameter end location int dEndLoc = 0; //direction parameter end location String lat; /*make sure that we are parsing the GPRMC string. Found that setting s.substring(0,5) == "GPRMC" caused a FALSE. There seemed to be a 0x0D and 0x00 character at the end. */ if(s.substring(0,4) == "GPRM") { //Serial.println(s); for(int i = 0; i < 5; i++) { if(i < 3) { pLoc = s.indexOf(',', pLoc+1); /*Serial.print("i < 3, pLoc: "); Serial.print(pLoc); Serial.print(", "); Serial.println(i);*/ } if(i == 3) { lEndLoc = s.indexOf(',', pLoc+1); lat = s.substring(pLoc+1, lEndLoc); /*Serial.print("i = 3, pLoc: "); Serial.println(pLoc); Serial.print("lEndLoc: "); Serial.println(lEndLoc);*/ } else { dEndLoc = s.indexOf(',', lEndLoc+1); lat = lat + " " + s.substring(lEndLoc+1, dEndLoc); /*Serial.print("i = 4, lEndLoc: "); Serial.println(lEndLoc); Serial.print("dEndLoc: "); Serial.println(dEndLoc);*/ } } return lat; } //} //} } //Parse GPRMC NMEA sentence data from String //String must be GPRMC or no data will be parsed //Return Longitude String parseGprmcLon(String s) { int pLoc = 0; //paramater location pointer int lEndLoc = 0; //lat parameter end location int dEndLoc = 0; //direction parameter end location String lon; /*make sure that we are parsing the GPRMC string. Found that setting s.substring(0,5) == "GPRMC" caused a FALSE. There seemed to be a 0x0D and 0x00 character at the end. */ if(s.substring(0,4) == "GPRM") { //Serial.println(s); for(int i = 0; i < 7; i++) { if(i < 5) { pLoc = s.indexOf(',', pLoc+1); /*Serial.print("i < 3, pLoc: "); Serial.print(pLoc); Serial.print(", "); Serial.println(i);*/ } if(i == 5) { lEndLoc = s.indexOf(',', pLoc+1); lon = s.substring(pLoc+1, lEndLoc); /*Serial.print("i = 3, pLoc: "); Serial.println(pLoc); Serial.print("lEndLoc: "); Serial.println(lEndLoc);*/ } else { dEndLoc = s.indexOf(',', lEndLoc+1); lon = lon + " " + s.substring(lEndLoc+1, dEndLoc); /*Serial.print("i = 4, lEndLoc: "); Serial.println(lEndLoc); Serial.print("dEndLoc: "); Serial.println(dEndLoc);*/ } } return lon; } } //Parse GPRMC NMEA sentence data from String //String must be GPRMC or no data will be parsed //Return Longitude String parseGprmcSpeed(String s) { int pLoc = 0; //paramater location pointer int lEndLoc = 0; //lat parameter end location int dEndLoc = 0; //direction parameter end location String lndSpeed; /*make sure that we are parsing the GPRMC string. Found that setting s.substring(0,5) == "GPRMC" caused a FALSE. There seemed to be a 0x0D and 0x00 character at the end. */ if(s.substring(0,4) == "GPRM") { //Serial.println(s); for(int i = 0; i < 8; i++) { if(i < 7) { pLoc = s.indexOf(',', pLoc+1); /*Serial.print("i < 8, pLoc: "); Serial.print(pLoc); Serial.print(", "); Serial.println(i);*/ } else { lEndLoc = s.indexOf(',', pLoc+1); lndSpeed = s.substring(pLoc+1, lEndLoc); /*Serial.print("i = 8, pLoc: "); Serial.println(pLoc); Serial.print("lEndLoc: "); Serial.println(lEndLoc);*/ } } return lndSpeed; } } //Parse GPRMC NMEA sentence data from String //String must be GPRMC or no data will be parsed //Return Longitude String parseGprmcTime(String s) { int pLoc = 0; //paramater location pointer int lEndLoc = 0; //lat parameter end location int dEndLoc = 0; //direction parameter end location String gpsTime; /*make sure that we are parsing the GPRMC string. Found that setting s.substring(0,5) == "GPRMC" caused a FALSE. There seemed to be a 0x0D and 0x00 character at the end. */ if(s.substring(0,4) == "GPRM") { //Serial.println(s); for(int i = 0; i < 2; i++) { if(i < 1) { pLoc = s.indexOf(',', pLoc+1); /*Serial.print("i < 8, pLoc: "); Serial.print(pLoc); Serial.print(", "); Serial.println(i);*/ } else { lEndLoc = s.indexOf(',', pLoc+1); gpsTime = s.substring(pLoc+1, lEndLoc); /*Serial.print("i = 8, pLoc: "); Serial.println(pLoc); Serial.print("lEndLoc: "); Serial.println(lEndLoc);*/ } } return gpsTime; } } // Turn char[] array into String object String charToString(char *c) { String val = ""; for(int i = 0; i <= sizeof(c); i++) { val = val + c[i]; } return val; } More tutorial  

RM14.00

  The MAX471 module (HCSENS0041) is a complete, bidirectional, highside current-sense amplifier for portable PCs, telephones, and other systems where battery/DC power-line monitoring is critical. High-side power-line monitoring is especially useful in battery-powered systems, since it does not interfere with the ground paths of the battery chargers or monitors often found in “smart” batteries. The MAX471 has an internal 35mΩ current-sense resistor and measures battery currents up to ±3A. The module has a built-in 2K Ohm sens resitor giving the module a full sensor range of +/- 3A. An open-collector SIGN output indicates current-flow direction, so the user can monitor whether a battery is being charged or discharged. Operation is from 3V to 36V, and draws less than 100µA over temperature   Descriptions Test Voltage range: DC3 – 25V (Arduino work on 5V) or DC3 16.5V (work on 3.3V); Test Current range: DC 0 – 3A Current sens max: +/- 3A Current sens voltage: 3 to 36V Sensor output: 1V / Amp Dimensions: 20mm x 19.5mm   Pinout  Sensor RS+ ......… Load positive supply (3 to 36V) RS- .......… Connect to load or charger Interface RS+ ......… Alternative load positive supply (3 to 36V) GND ......… Connect to loads 0V/GND supply OUT .......… Current sensor output (1V / Amp, 3V max) SIGN .....… Current flow direction. An open-collector logic output (low = current flow from RS+ to RS-). GND ......… Alternative GND (Connect to loads 0V/GND supply) RS- ........… Alternative load/charger connection.    

RM12.00

The AP3216C is an integrated ALS & PS module that includes a digital ambient light sensor [ALS], a proximity sensor [PS], and an IR LED in a single package. This device provides a multiple gain function with linear response over a dynamic range 365/1460/5840/23360 and is well suited to applications under clear glass or darkened glass. The proximity function is targeted specifically towards near field application and detects external object with simple configurable zone controlled by registers. With multiple proximity gain control, multiple IR LED current control and 10-bit ADC output, this device is designed specially to fix low reflection objects, such as black hair. The device supports an interrupt feature to improve system efficiency and several features that help to minimize the occurrence of false triggering. Through internal calibration and CMOS design, the AP3216C is designed to minimize device-to-device variations for ease of manufacturability.   Applications Mobile and tablet Personal navigation device Notebook / Ultrabook LCD / PDP TV backlight systems Digital photo frame   Features I2C interface (FS mode @ 400k Hz) Mode Select: ALS, PS+IR, ALS+PS+IR, PD, ALS once, SW Reset, PS+IR once and ALS+PS+IR once Ambient light sensor Effective Linear Output 16-Bit (0 ~ 65535) 4 Dynamic Selectable Range Anti-flicker mode High sensitivity in dark glasses Proximity detection 10-Bit Effective Linear Output Effective (0 ~ 1023) 4 programmable output stream Built-in temperature compensation circuit   Specifications Wide operating temperature range (-30°C to +80°C) Ambient Light Photo Sensor 16-bit effective linear output (0~65535) 4 user selectable dynamic range Anti-flicker rejection (reject 50/60Hz) High sensitivity @ darkened glass Window loss compensation Proximity Detector 10 bit effective linear output (0~1023) 4 programmable IR LED current output High ambient light suppression Cross talk compensation Form factor 4.1mm x 2.4 mm x 1.35 mm   Packaging Content AP3216 1 x 8 pin header

RM3.00

  The A3144 is an integrated Hall effect nonlatching sensor. That's nice but what does it do? Holding a magnet near the sensor will cause the output pin to toggle. This makes for a robust presence sensor. A reed sensor also works nicely, but can be limited by the glass encapsulation and size. A hall effect sensor is much smaller, but can handle less current than a reed switch.