Hello,
I'm trying to get a device with 64 outputs (24 VDC) to communicate with a PC through it's serial port. I realize I need to use parallel-in serial-out shift registers to accomplish this, but there's a couple problems.
First, the output side of the circuit is borrowed from Bill Bowden's page for his (PC Serial Port Reciever) circuit. It runs fixed at 9600 baud and uses two stop bits. As far as I can tell, that means I'll need to use
11-bit hift registers.Second, once the data's been clocked out of the registers to the port, the zero-voltages need to be converted to -10 volts and the +5 volts need to be amplified to +10 volts. Does anyone have any circuits or examples that can do this?
Thanks.
Joel