Trouble starting PIC or internal clock on 12f683?

[ScaleRobotics]

I compiled the program I had on the website, and it ran correctly for me. A couple things I notice that are different. The diodes you are using look to be different than the small diodes I used, the 1n914. The scope seems to show this difference on the input signal, as the channels never quite get back to zero voltage, although they do get pretty close. I would try the 1n914's if you have them. If not, try just inputting a single channel with and without the diode, and see what it looks like on the scope. It will still output a single channel (as servo 3). If this is the issue, a single channel without the diode should work.

I have also included a hex file, just in case there is a difference there. I used Darrels latest DT_INTS version 1.00 for mine, but it seems like the old version would have worked as well.

1.00 can be found here: http://darreltaylor.com/DT_INTS-14/intro2.html

I tried it on a FMA FS8 Co-Pilot, and a Hi-Tech Electron 6 receiver.

[PickyBiker]

Thanks for the information. I'll pick up some 1N914's and see if that's the problem.

Best,

Mike

[ScaleRobotics]

Also, another detail is I am getting 3.04 volts on my incoming peak to peak with the FS8, and 3.6 volts with the Electron 6. Not sure if that would make a difference or not. Both work here, but your voltage is a little lower.

[PickyBiker]

Okay, the 914's are in and there is no output pulses unless I touch the chip or input pin 5 with my finger. I am getting just about 3.0 volts input pulses and I guess that is the difference because just the slight capacitance of my finger, starts the output. It must be right on the edge.

[ScaleRobotics]

Bummer. How about putting a transistor in there to boost the voltage to 5v on the the input pin?

[PickyBiker]

All I can say is that great minds think alike. Working on a sig booster now.

Thanks for all your help.

[PickyBiker]

Status:
I used a pair of 2222 xistors to invert the pulses twice so that they are the correct polarity.
The pulses are now 5v and I am still getting fixed pw on all 4 outputs. I must have some bad karma or I ran out of mojo.