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8 bits transmissor/receiver

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TJ

New Member
Hello. Over time I've built a lot of electronic projects using the PC's parallel port. For instance, I've built a simple car, running with 2 stepping motors. There's a long cable that goes from the parallel port's 8 TTL outputs and to the car.

Right now it looks like this

8 outputs/inputs from the parallel port
|
| [wires]
|
\/
a 2803 chip on the car
|
|
|
\/
other stuff needed to make the car go



What I would want to do, is simply replace the wires. I'd need a transmissor, and a receiver capable of receiving the 8 outputs and giving the 2803 chip onboard the TTL levels it needs. Of course, I'd also need to power the car with a battery or something, thus replacing the power supply's wires also, but that's beyond the scope of this post.

What would be the simplest way of building this?
 

pike

Member
assuming you know how to program microcontrollers, you could use the micro to convert the parrallel data into serial data, from there you can output the serial data to a transmitter module.

At the reciever end, you can convert the serial data back into parallel (using a micro) and use the information from there...
 

tavib

Member
:?:
Why don't use serial port from PC?
of course you need a program for serial port.
A laser comunication system is good for short distance and is simple.
For long distance you need a more complex RF system.
 

TJ

New Member
Well, I'm looking for info on what ICs may be worth checking out, and that kind of stuff. And I'm looking for a RF solution (not infrared).

Isn't microcontrolles a bit overkill? Those cheap made-in china toy cars are apparently able to send 4 bits of data (4 servos) using a couple of ICs.
 

Russlk

New Member
The microcontroller is not really overkill because to send 8 bits of data in parallel, you need 8 or 9 subcarrier channels in the RF. That means 9 filters or phase lock loops in the receiver versus one micro.
 
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