Contribute to keyestudio/Arduino-board development by creating an ... When switched to 3.3V, level on serial communication port is 3.3V, voltage of pins is 3.3V. It also breaks out two ... Or used as ...

an Arduino board (this was developed on a Leonardo, but should work with any other Arduino board) one Arduino digital pin for each relay, by default pins 2 to 8 are used; 1 to 8 relays which can be ...

Wemos D1 board, a $9 ESP8266 board in Arduino UNO form factor, now has a little brother with Wemos D1 mini. The board looks somewhat similar to NodeMCU with breadboard friendly I/Os on the sides and a ...

ArduPico with Raspberry Pi Pico board. WisdPi ArduPico is an Arduino UNO-shaped baseboard designed for the Raspberry Pi Pico and compatible boards that enables makers to reuse most 3.3V Arduino ...

The reprogramming of the Lily main board was easily allowed by the USB to UART board that does not require the need for soldering. The Lily Pad main board is using the FT232RL integrated circuit from ...

The expansion board is claimed to be the world's first to enable the development of 3.3V Arduino compatible applications using a 32-bit high-performance MCU in a prototyping friendly package.

To drive a relay from the Pi, one needs to cobble up a fairly simple circuit where the 3.3V GPIO pin turns on a transistor that drives the relay. This is such a common requirement that I figured ...