Trouble starting PIC or internal clock on 12f683?

[ScaleRobotics]

The code does act funny if the input from the pulses exceeds the 1ms to 2ms range. Check your transmitter, and see if you have any channels above 100%. You might try changing them to 95% in both directions, just to make sure.

Walter

Edit:
Do you have the diodes on the three incomming receiver signals?

[PickyBiker]

Yes, the diodes are there and I get good 5v pulses just like on your web page. Current status:

all channels 85% with 0 offset and 0 subtrim.

No changes detected in output pulses.

Could the missing servo 1 pulse be because I have the WDT on? (Remember, it won't start if I set WDT off).

[ScaleRobotics]

Sorry to hear that.

Let me double check what I have when I get home tonight. I will let you know what I have, and double check my wiring to see if I differ from my schematic.

Thanks for the feedback.

Walter

[PickyBiker]

Thanks Walter.

In my circuit, I needed a pull-down resistor for pin 5. Without it the trailing edge of each pulse was badly sloped. It could be just a difference between our receivers, mine is a Spektrum AR6000.

Best,

Mike

[ScaleRobotics]

Mine were a little sloped as well. But when I tried to add a resistor, it dropped the voltage down too much for it to detect a pulse. I suppose they would all slope equally, so it should not change things too much. Or, a transistor could be added to boost the voltage.

I did notice that I had my MCLRE_ON on my circuit, but did not show it on the schematic. But you can sort of see it in the picture, with the red wire:


I used

@ __config _INTRC_OSC_NOCLKOUT  & _WDT_OFF & _MCLRE_ON & _CP_OFF

I will test with an extra receiver or two tonight, but you might try changing the osc setting, and MCLRE to what I have above, tying MCL to high, and using no resistors for the receiver in on pin5.

Walter