Electronic newbie here.
I'm trying to use a TLP222A as a remote switch for a small signal (3V and about 150-200mA at most).
It's super simple, but I can't understand why the following happens:
I'm powering the TLP222A connecting pin 1 and pin 2 (anode and catode) directly to a power supply that provides 5V and 40mA, connecting and disconnecting the anode with a momentary switch.
First, I have tried to turn on and off a led connecting it to the same 5V and ground through the TLP222A and it works perfectly. The led turns on when I connect pin 2(anode) to 5V and it turns off when I disconnect it.
(D1, D2, D3, M1 and M2 are part of the TLP222A)
Then, I have tried to connect two cables to pin 3 and pin 4 to check if I have conductivity when pin 1 and 2 are connected to the power supply. The tester never indicates conductivity.
I have also tried to connect the cables to the device that I want to control remotely and nothing happens.
Could someone help me to understand what is wrong in my approach?