this is a simple schematic for a remote reset/power on/off device
to use for controlling up to 4 lines via the parallel port.
depending on the number of lines you require, the opto coupler
will be PC817, PC827 or PC847.
or you could use the following schematic to drive up to 8 lines,
with the drawback that a reboot of the controlling machine will
probably reboot all your attached devices ...
the software part is pretty simple, but sufficient. parport.tar.gz
ECP = Extended Capabilities Port
(at the PC)
25 PIN D-SUB FEMALE at the PC.
Pin | Name | Dir | Description |
---|---|---|---|
1 | nStrobe | Strobe | |
2 | data0 | Address, Data or RLE Data Bit 0 | |
3 | data1 | Address, Data or RLE Data Bit 1 | |
4 | data2 | Address, Data or RLE Data Bit 2 | |
5 | data3 | Address, Data or RLE Data Bit 3 | |
6 | data4 | Address, Data or RLE Data Bit 4 | |
7 | data5 | Address, Data or RLE Data Bit 5 | |
8 | data6 | Address, Data or RLE Data Bit 6 | |
9 | data7 | Address, Data or RLE Data Bit 7 | |
10 | /nAck | Acknowledge | |
11 | Busy | Busy | |
12 | PError | Paper End | |
13 | Select | Select | |
14 | /nAutoFd | Autofeed | |
15 | /nFault | Error | |
16 | /nInit | Initialize | |
17 | /nSelectIn | Select In | |
18 | GND | Signal Ground | |
19 | GND | Signal Ground | |
20 | GND | Signal Ground | |
21 | GND | Signal Ground | |
22 | GND | Signal Ground | |
23 | GND | Signal Ground | |
24 | GND | Signal Ground | |
25 | GND | Signal Ground |
Note: Direction is Computer relative Device.