G
graffy76
- Jan 1, 1970
- 0
Hello,
I'm trying to get a device with 64 outputs (24 VDC) to communicate with
PC through it's serial port. I realize I need to use parallel-i
serial-out shift registers to accomplish this, but there's a coupl
problems.
First, the output side of the circuit is borrowed from Bill Bowden's pag
for his (PC Serial Port Reciever) circuit. It runs fixed at 9600 baud an
uses two stop bits. As far as I can tell, that means I'll need to us
11-bit hift registers.
Second, once the data's been clocked out of the registers to the port, th
zero-voltages need to be converted to -10 volts and the +5 volts need to b
amplified to +10 volts. Does anyone have any circuits or examples that ca
do this?
Thanks.
Joel
I'm trying to get a device with 64 outputs (24 VDC) to communicate with
PC through it's serial port. I realize I need to use parallel-i
serial-out shift registers to accomplish this, but there's a coupl
problems.
First, the output side of the circuit is borrowed from Bill Bowden's pag
for his (PC Serial Port Reciever) circuit. It runs fixed at 9600 baud an
uses two stop bits. As far as I can tell, that means I'll need to us
11-bit hift registers.
Second, once the data's been clocked out of the registers to the port, th
zero-voltages need to be converted to -10 volts and the +5 volts need to b
amplified to +10 volts. Does anyone have any circuits or examples that ca
do this?
Thanks.
Joel