View Full Version : need help with HB-25 to propeller

01-29-2007, 08:04 AM
I am not able to get the HB-25 to work consistantly with the propeller.
I'm stumped! This is what I did...

1st day hooked up signal and signal gnd to a RC reciever.......... no results
then tried sending 1ms pulse from propeller ................ no results

2nd day tried sending a string of 1ms pulses from prop ............ runs but wont start every time

3rd day tried to convert bs1 sample program to prop .............. no results

The fact that it worked one day but not the others is what is confusing me.
Is the prop chip able to drive the HB-25 directly?

Chris Savage
01-29-2007, 10:53 PM
This thread is being moved from the Robotics Forum to the Propeller Forum.

Chris Savage
Parallax Tech Support

01-29-2007, 11:04 PM

Normally, the Propeller is TTL compatible for output and mus be able to drive the HB-25 directly. I suppose that the HB-25 need same signal as a servo ?
You can try object for drive servo from 'Propeller Object Exchange' like 'Servo32_Demo V1.2' or 'Servo-4'. Just for be sure that the code is right.

Best regards,

in medio virtus

Post Edited (inservi) : 1/29/2007 4:10:43 PM GMT

01-30-2007, 01:47 AM
Try this post.

01-30-2007, 09:06 AM
Thanks to Brian & Inservi for the response. That link was helpful.
I did get things working tonight by toggling the comunication time out mode.
Neither unit worked before, but now both do. Who knows why but I'll take it.