Hi everyone,
I have a university assignment due after tomorrow, so this is very last minute. The intentions of my assignment was to get a garage door to open by using the GPIO pins on an RPi2. I know this has been covered plenty of times on the internet, but most of them are using relay switches or independent power supplies and things I don’t understand.
I have Jaycar Electronics (Australia) about 20 minutes drive away. If cell button remote control, and the contacts of the open switch soldered with a wire either side, what parts do I need to get this to work from a command line?
Optocouplers, relays and transistors are about as far as I got, but I don’t have enough electronics knowledge to know what I need to wire.
Most sources online seem to include an independent power supply, but I really can’t understand what use that serves when I thought I was only joining a circuit by supplying an optocoupler with the Pi’s GPIO 3.3v output.
Please help! I’ll try my best to understand wiring diagrams.