Hi, I am trying to replace RF remote switches with transistors and want to control them using raspberry pi GPIO pins.
- Here as you can see, the grounds are different, so the circuit is not working. If I try to connect the raspberry pi ground to emitter of transistor it works fine. But my problem is, if i connect emitters of 2 transistor 2 same raspberry pi ground, it would short those 2 pins. I am not sure about the circuit on the remote, so can't short those 2 pins. Can I use another transistor to connect the ground to the emitter, for which base is connected to the same raspberry pi GPIO pin? What is the best way to do this? I know optoisolators are better way, but i don't have them presently. Please suggest if i can achieve using trasnsistors.