I have a tv lift that I would like to automate, it currently is controlled by a rf remote. The controller on the lift has 2 relays that control up and down which stop when it reaches open and closed. Can somebody look at the relay layout and tell me which pin I need to send a signal to for up and down. Here is the data sheet. https://www.digikey.com/htmldatasheets/production/2071105/0/0/1/jqc-3ff.html
Thanks Michael
The two outer pins on the side with three pins are the ones that power the coil.
Non of them. You need to give a signal to the transistor that drives the relay.
There’s no way you can drive the relay directly from Esp32. Esp 3.3V 20mA signal is not able to power 5V relay coil that needs 70mA current to switch.
Edit:
Wouldn’t it be easier to get 2-ch relay module and connect it to the lift motor?
Either replacing the original driver or connecting it in parallel.
1 Like
So something like this and just jump into the wires coming off original controller? Thanks
I also have this wired controller that I don’t use but could plug back in. Could the esp 32 just use an output ran to one side of button, that would be easier right? One button is raise and the other is lower.
Possibly, but first you need to measure the voltage between board GND and both sides of the button.
Another option is to replace that board with 2-ch relay.