Hey everybody,
I have a circuit mounted with relays, four channels. It´s connected to the computer by an RS-232 port, female on the circuit and on the computer. But when I connect it, all the four relays are activated at once and I don´t know how to change it.
I´d like to do it with visual basic.
If anyone knows how to do it please tell me. If someone needs a schematic or a picture just say it.
Thanks

 

So far, you have all the information about the circuit. If there is a manufacturer's name and number on the PCB, you may be able to get some information about it.

 

What is the point of a post like this. Did you think we'd lay our hands on our monitors and perform a Vulcan Mind Meld? Of course you should post all available information regarding your relay board.