I made this Arduino project that allows to turn ON and OFF LEDs using a cheap IR remote control as a ... You must check the datasheet before use the IR module to see which pins connect to the power ...

Did you know that you can use Arduino to turn on an LED when ... but you won’t be able to turn it OFF without using the third sketch. Actually you can disconnect the board from the power supply or USB ...

Comparing the Arduino Uno and the Nano ... It's also a great idea to connect a switch for the battery, so you can turn the power on and off as needed without unplugging the wires.