I managed to get the microcontroller to work quite well, so I don't have a problem with it.
The question is this: The ULN2803 does not have a V+ pin, so does that mean it does not require power? It only has a GND pin, which I believe should be connected to a GND (probably the GND of the microcontroller?)
Now, I think I have to connect an output of the PICAXE 20x2 to an input of ULN2803. After this, where should I connect the respective output of the ULN2803 on the relay?
Also do I have to use a 12 VDC power for my relay? Or maybe I can use the same 5 V power of my microcontroller? If not, where should I connect this 12 V on the relay?
Sorry for total noob questions, I hope you can guide me.
I can not still make this circuit to work properly. Here is the work I have done so far, please have a look. The problem is, if I connect ULN2803 pin 10 to +12 V or GND, the relays either dont work or just lock the current state. Where should I connect ULN2803 pin 10?