for a 12v relay you'll want to get an external power supply to power the relay board with outgoing voltage https://www.sparkfun.com/products/15664 the arduino only has 3.3v or 5v out, so you'll use the GPIO from the arduino to tell the https://www.mouser.com/ProductDetail/Microchip-Technology/MCP23016-I-SP?qs=wJ05WdDZ4qSh1zpy%2FYO6vg%3D%3D io expander which one of the 16 relays to turn on. I'm actually building my own garden watering system... the arduino doesnt have enough pins for 16 relays, so thats what the io expander does. Basically something like 4 pins as 4 bits so you can count to 16.
badkangaroo 0 points 3.2 years ago
cool story bro
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badkangaroo 0 points 3.5 years ago
https://beagleboard.org/ ya these are pretty fun to work with.
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badkangaroo 0 points 3.5 years ago
ya, for levers a 45-70 is pretty fun, lotta options that will stop an intruder without taking out your neighbors too.
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badkangaroo 0 points 3.6 years ago
VSCode is pretty normie tier. Atom and Sublime are pretty hipster. i use sublime for simple text stuff since it's small and opens immediately...
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badkangaroo 1 point 3.8 years ago
https://www.instructables.com/Low-Cost-Automation-ESP32-and-16-Relays/
for a 12v relay you'll want to get an external power supply to power the relay board with outgoing voltage https://www.sparkfun.com/products/15664 the arduino only has 3.3v or 5v out, so you'll use the GPIO from the arduino to tell the https://www.mouser.com/ProductDetail/Microchip-Technology/MCP23016-I-SP?qs=wJ05WdDZ4qSh1zpy%2FYO6vg%3D%3D io expander which one of the 16 relays to turn on. I'm actually building my own garden watering system... the arduino doesnt have enough pins for 16 relays, so thats what the io expander does. Basically something like 4 pins as 4 bits so you can count to 16.
/v/AskVoat viewpost?postid=6104af40dbbb4