Review on π GeeekPi Raspberry Pi Expansion Board 4 Channel Relay Board - Power Relay for Raspberry Pi 4B, 3B+, 3/2B (No Programming/Programmable) by David Romo
Nice built in HAT relay set
Fits snugly over the GPIO headers. I needed a relay to close the connection on command from my Pi clone and it works great. I have 3 more Relays to play with so I'm thinking of additional tasks for my SBC to do!
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