What voltage does the equipment use? What is the voltage across each of the open switches?
It uses 220V and it has some AC-DC converters 12V for motors and 5V (tested with multimeter) for the pic. Im a little scary handling the PCB on and multimeter with 220V working on some wires there.
Hi Aruen (or is it Auren ?).
You can't simply connect an Arduino pin to some external unit and hope it will work, without knowing what signals are normally there.
The buttons have a lot of solder pads, each button visible in your 2nd picture has at least 1 solder pad to each end.
You could use those to solder the outputs of some relays to.
These relays can be very small ones as there will not be large currents running through the contacts.
So now you have to find out how to connect relays to an Arduino (because you shouldn't connect them just like that), it has been discussed a lot over here.
You could also find out more details about the normal signals in this device of yours, maybe something simpler can be used.
Hi Its Aruen.
I know i cant connect and hope it works hehe. I isolated a short in between the pads who activate the button (i tested with a wire, making short it works like pushing the button). Seems very hard to sold there a wire and obtain reliability.
Are relays for 220V? Never worked with them before. Will a simple 0V/5V signal works? Also i will need to get 5V and GND from the PCB (corrects me if im wrong). Seems little hard to get the wires from there.
What i was thinking is simulate the rubber button so arduino will make as it is pushed or not but maybe its not possible. This will avoid to use internal PCB electronics.
Thanks for your reply.