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Parallel Port Robot Control Pin-Out

Thu, 02/19/2009 - 05:47 — admin

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.

Basic circuit
The basic circuit above only shows one relay, but this chip will support up to 7 relatively large 12V relays.

Previous Prototype
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