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Registered Member #3926
Joined: Fri Jun 03 2011, 08:32PM
Location: UK.
Posts: 525
at 19v input (10vdc into 555) the TVS I think, gets very very hot it's a perfect circuit, not even built by me, what's causing the zener to get steaming hot (after 10 seconds, it'll start to melt solder)...
Registered Member #3926
Joined: Fri Jun 03 2011, 08:32PM
Location: UK.
Posts: 525
MOSFET is OK, 555 is OK, I have spare 555 and MOSFET, TVS was very very hot, now the circuit outputs very low spark not even a mm, So I think TVS is dead, because it can't be a resistor or capacitor...
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Platinum wrote ...
MOSFET is OK, 555 is OK, I have spare 555 and MOSFET, TVS was very very hot, now the circuit outputs very low spark not even a mm, So I think TVS is dead, because it can't be a resistor or capacitor...
whats the voltage rating in the datasheet for Z1? Can you post the datasheet please...
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555 driver very hot
