If you are designing your own intelligent “Graden Computer” with an optional digital plant moisture sensor/water pump controller that lights an LED to alert the user when it is time to water a potted ...

This Arduino Uno setup can be powered by a 6F22 9V battery or other suitable power source, but it is up to you. The next piece of hardware is a dual-channel, low-trigger, 5V relay module. This relay ...

For that reason, [Hulk] designed a simple relay module in order to cut the amount of time he spends implementing this solution in his various other projects. While driving a relay with a ...

Instead, he drew up a simple schematic that used an Arduino Nano, an FM radio module based on the TEA5767, and an audio amplifier based on the LM386. A single button on the Arduino helps cycle ...