Arduino Uno With Optocoupler Relay is a board based on ATmega328p which is an 8-bit microcontroller from ATMEL. The main purpose of building this board is to use it in COVID-19 and similar kinds of ...

In adding an alternative cutter drive motor (‘spindle’) to an existing cnc machine, an electrically isolated pwm to analogue converter is needed. The machine uses a ‘grbl’ controller, which has an ...

'Arduino' and '400VAC' generally should not be in the same project. Optocouplers are nice, but 400VAC with DOL motors nearby can be nasty - big spikes. Watt-wasting with resistors is also going to ...