Join Date: Aug 2006
Location: Christchurch, New Zealand
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Well i built a second probe today....another dead duck, man I took hours going slowly and surely, the sensors I was twice as careful, not to overheat them. The first probe did seem to work at first, then failed, but the probe still runs the led and I can programme the IR led. The second probe just fails to work all together.
I checked the PICs and they are fine, even reflashed them verifyed the programming, checked the curcuits...fine, eveything is in the right place, resistors correct values, the only thing i can think the issue is, is different brand of capacitors. Slightly different voltage ratings, but they are meant to be voltage and value independant, ie voltage doesnt really matter.
The electro is a is a 16v 100uf, polar orientated as per the photographs and drawings.
The 100nf i have, on the bag, Cap Cer y5u 100n 50v 20%
The 33pf I have, on the bag, Cap Cer NPO 33p 50v 10%
I couldn't find anything that remotely looked the same as the ones in the photos, only the rating values. I checked these with electronics ppl and they thought they would be fine.
sigh. so frustrating. I moded PC boards with voltage mods which were more daunting, but worked fine. Really puzzled whats going wrong here as everything appears straight forward??
ANy ideas? Laric, George?
Masterpiece Calibration Ltd