RC servo on the parallel port

You can try a

For one RC servo, you could use a microcontroller that has 8 digital input lines, with one RC servo signal output line. Then if you set the 8 inputs to a bnary 127 you have a center position on the servo, 0 gives full throw one way, 255 gives you a full throw the other way. Anything in between move the servo that amount proportionally.

Hi....

I have a pic programmer (PicStart plus)...but don't know how to write a program .... just start with it....

I was thinking of using a pic controller..... I want control the servo in 256 steps..(8 bits)

how many servos?.... i need 8 inputs for the Parallel data....so i don't know how many is possible.... ...

is this difficult to make?

bye....

"Earl Bollinger" schreef in bericht news: snipped-for-privacy@comcast.com...

hmm I think it not easy becauss still have no answers

How long have you been waiting for an answer ???

Arjan Swets wrote:

It is easier to hand the pulse timing issues off to a PIC or maybe a 555 chip.

"Si Ballenger" schreef in bericht news: snipped-for-privacy@news.comporium.net...

i have build this one:

but i'm not that good with electronics....

There are web sites that have info on programming your own PIC to control servos, but I have not been successful in doing this yet. You can control 3 more of these 555 based controllers by using the parallel port control pins 1, 16, and 17 (15 is already used) to clock/latch the 3 new controllers. The data pins to the 4 controllers would be in parallel from the parallel port. You could also use two 74HCT259 chips controlled from the 4 control pins to individually clock up to 15 of the 555 controllers (I use this as a webcam switcher). You might also be able to just to use transistors to switch on/off the +5V power to the individual servos if they don't have sufficent load to rotate them off position when power is removed. Haven't tried that yet. Some links below.