In SX Microcontrollers, SX/B Compiler and SX-Key Tool, william wrote:

Beau,

The snubber circuit of Q3 and Q5 does not stay "on" because the 12v line is actually only 10v due to use of the 10v zener.  ( eagle don't have a 10v power symbol ).

I want to ask your opinion about the suggested "reverse biased diode across the C-E junction".
Wouldn't negative spikes like be eaten up by C5 470uf?  Is it possible for a spike to be much faster than the response of the capacitor? ( i doubt it )
If a spike is so powerful that it could reverse the charge of C5, a reverse biased diode would also be unable to stop a restart due to brown-out right?

Chris,  

I am not having "strange issues", meaning these problems are expected at design stage, that's why I added the snubber circuit.
Any micro placed next to a flourescent lamp will always experience "strange issues" in that sense.

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