Parallel Port Robot Control Pin-Out
This is very much a work in progress, just to keep me thinking about it.
I have used Parallel Port controllers as a very simple switch and sensor, this project is to develop a very low-cost simple computer controller for robot of a reasonable size.
The basic circuit above only shows one relay, but this chip will support up to 7 relatively large 12V relays.
Above are two examples of previous projects, one is made inside a D Connector, and the other is a test unit with LEDs and terminal block.
|
Output |
Pin |
State = 0 |
State = 1 |
|
D0 |
2 |
Left motor power off |
Left motor power on |
|
D1 |
3 |
Right motor power off |
Right motor power on |
|
D2 |
4 |
Left motor forward |
Left motor reverse |
|
D3 |
5 |
Right motor forward |
Right motor reverse |
|
D4 |
6 |
Left motor slow |
Left motor fast |
|
D5 |
7 |
Right motor slow |
Right motor fast |
|
D6 |
8 |
Light On - OK |
Sound Alarm - Not OK |
|
D7 |
9 |
Regenerative Brake Off |
Regenerative Brake On |
|
Input |
|
This is a very simple circuit. |
0V=State 0, +5V=State 1 |
|
Acknowledge |
10 |
Motor power is Off |
Motor power is On |
|
Busy |
11 |
No Obstruction |
Obstruction Rear |
|
Paper Out |
12 |
No Obstruction |
Obstruction Left Front |
|
Select |
13 |
No Obstruction |
Obstruction Right Front |
|
Error |
15 |
Distance Pulse Off |
Distance Pulse On |
Notes:
1. Main motor controls are not powered up until system in right state (so it does not matter if PC data pins change state at boot-up).
2. Start control software to sets parallel ports to the right state
3. Find someone to help write code ;-P