Mosfet Cap Dump schematic with 555 timing... also has mistakes check description! 

MY EXHAUSTED DUMBASS FORGOT TO CONNECT THE GROUND PIN ON THE VOLTAGE REGULATOR TO THE GROUND OF THE 555 PLEASE MAKE THAT CONNECTION, ALSO THE MOSFET NEEDS A RESISTOR ON THE GATE AND SOURCE PINS A 10K SHOULD BE FINE FOR VOLTAGES UNDER 80V BUT IF YOU ARE DUMPING HIGHER VOLTAGE TRY USING A 15 TO 30K RESISTOR
Here's the Mosfet Cap dump circuit schematic. This circuit can also be used to switch on SSRs .
Note that if you want to charge just from A 30v cap bank or less it's not necessary to use the bridge rectifier part of the circuit going into the voltage regulator. just use a 2k minimum resistor
and adjust it accordingly
if the resistor gets warm then raise the resistance slightly and if it's cool you can lower the resistance.
you can just short the bridge rectifier leads out together and that will eliminate it from the circuit without removing it.

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