Electronics > Electronics

Why did my capacitor in my transmitter blow

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Mastermime:
When building this boosting regulator, I was just following the schematic on this website http://www.zen22142.zen.co.uk/Circuits/Power/boosti.htm

waltr:

--- Quote from: Mastermime on November 11, 2012, 02:50:57 PM ---When building this boosting regulator, I was just following the schematic on this website http://www.zen22142.zen.co.uk/Circuits/Power/boosti.htm

--- End quote ---

This circuit is correct. It uses an PNP transistor with the Emitter on the higher (input) voltage side.
The circuit you posted above is not. The transistor is backwards (Emitter arrow should point to the low voltage side (output).

Mastermime:
Ahh sorry about that.  When I was soldering, I was following the correct circuit.  I just made that schematic so you guys would be better informed.

So the conclusion I'm coming to i that accidentally shorted that power line by touching the two probes of my multimeter together.  Waltr, can you confirm this?

ebrady:
Other than the transistor, is the schematic correct?   If so, I am not seeing how a short circuit across your probes should result in a capacitor blowing up.   

It could have been a bad cap.

Mastermime:

--- Quote ---Other than the transistor, is the schematic correct?
--- End quote ---
Yes everything else is correct.

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