Hello all,
I'm making a kind of timing project to time dogs in a relay race. I've writen software in VB6 using the MSComm control to handle the splits and total times, etc. The start/finish line is a Retro Reflective photoelectric sensor.
I have very, very, little experience with electronics :roll:
All I need to do is to be able to detect when 5V DC is present on a pin at the RS232 connection on the computer. In other words, the computer is connected to my circuit through a COM port (RS232), and listens for a state change on one of the pins (I don't care which one I guess).
So what I'm wondering is if I can do this. Can I just detect a voltage on a pin (rather than having to send data to it)?
I'll attach the circuit and you can rip it appart.
Thanks in advance for your help!!!
I'm making a kind of timing project to time dogs in a relay race. I've writen software in VB6 using the MSComm control to handle the splits and total times, etc. The start/finish line is a Retro Reflective photoelectric sensor.
I have very, very, little experience with electronics :roll:
All I need to do is to be able to detect when 5V DC is present on a pin at the RS232 connection on the computer. In other words, the computer is connected to my circuit through a COM port (RS232), and listens for a state change on one of the pins (I don't care which one I guess).
So what I'm wondering is if I can do this. Can I just detect a voltage on a pin (rather than having to send data to it)?
I'll attach the circuit and you can rip it appart.
Thanks in advance for your help!!!