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Arduino Control Relay Sketch

Control a relay using the Arduino Board, one 1K and one 10K resistors, 1 BC547 transistor, one 6V or 12V relay, one 1N4007 diode and a 12V fan. When the button is pressed the fan will turn ON and will remain in this state until the button is pressed again.

Arduino Uno or Raspberry Pi ?

Build your own Arduino-powered desktop 3D scanner with infinite resolution

The DIY 3D scanner uses a stepper motor controlled by an Arduino board to turn the scanned object by a fixed amount, before an LED triggers the camera’s wireless sensor, setting off the shutter. This process is repeated until photos have been collected from all angles, allowing one’s photogrammetry software to construct an accurate and high-resolution 3D image of the subject. There are just five key ingredients to the budget 3D scanner: Arduino, stepper motor driver, stepper motor, IR LED and LCD shield.

Hand cranked power generator, capable of generating 30 Watts of power

Featuring 60 3D printed parts, Even needed two 3D printers to complete the project: I used my Ultimaker 1 for the biggest parts, and a Makerbot Replicator (Dual) for the smaller ones. Taking about 250 hours to 3D print almost everything in PLA, you can imagine what this did to that month’s power bill.

Key differences between the DRV8825 and A4988

The DRV8825 carrier was designed to be as similar to A4988 stepper motor driver carriers as possible, and it can be used as a drop in replacement for the A4988 carrier in many applications because it shares the same size, pinout, and general control interface.

Mono vs. Poly solar panels explained

When you evaluate solar panels for your photovoltaic (PV) system, you will encounter two categories of panel options: monocrystalline (mono) and polycrystalline (poly).

RS485 Serial Communication Between Arduino Mega and Arduino Pro Mini

In this project, we will discuss about how to use Max485 for serial communication. How to effectively configure RS485 in Receive and Transmit mode. What are advantages of using RS485 protocol for serial communication and finally I will present a working model of RS485 serial communication between Arduino Mega and Arduino Pro Mini.

Tutorial 8×8 Dot Matrix MAX7219 with Arduino UNO + Pong Game

The dot matrix that we’re going to use in this guide is a 8×8 matrix which means that it has 8 columns and 8 rows, so it contains a total of 64 LEDs.

The MAX7219 chip makes it easier to control the dot matrix, by just using 3 digital pins of the Arduino board.

Use An Inverter

Many guys use an inverter to convert 12 VDC to 230 VAC. Since they change power from one form to another, inverters are power-gobbling monsters and should be avoided when possible. If you have a choice of a 12-volt, DC-powered device or 230-volt AC device, go with the 12-volt DC device.