What I'm trying to do is set up a web interface on the ESP8266 to control my Automatic Gate
My automatic gate is controlled via a 330MHz RF Remote which is specific to my country and overall is uncommon/rare in other countries.
After opening the remote and a quick test with my Multimeter I found that each button connects the 12v+ lead from the battery to a diff part of the circuit which inturn opens/closes either 1 gate or both gates.
My initial plan was to control trigger the remote buttons with 2 independant small 3v coil-relays. However after hooking everything up to the esp8266 it became clear that it does not have the required current to drive the relay (SRD-03VDC-SL-C), so my revised plan was to buy a couple of EL817 Photocouplers to drive the relays.
It then occured to me that it might be possible to directly drive the RF Remote with EL817, is this a good idea?
I have also been reading about the 4N25 series Photocoupler and now I am really not sure which one to use? the main diff with mine vs the example circuits is that my RF Remote will be connected to the emitter of the coupler and not the collector.