a little troulbe with a negative voltage inverter

[mordechai]

I'm wiring up a double fuzz pedal...Fuzz 1 is PNP, and Fuzz 2 is NPN.  In the past, I've used THIS little daughterboard to allow my PNP effects to run off of a 9V external power supply:

http://tagboardeffects.blogspot.com/2012/05/negative-voltage-inverter.html


I have this wired up as usual to the 9V DC jack, and it's working for the PNP circuit.  But I'm not sure what to do to allow the NPN circuit to get power from the same jack and bypass the daughterboard.  I gave it a shot, and as soon as I turn on the NPN ciruit, the power cuts out on the 9V supply (a Dunlop DC Power Brick).

Any tips on how I should wire this thing up so that both circuits can get power?

[bluebunny]

You just power the NPN circuit directly from the DC jack?   

[Phoenix]

Or, just arrange the circuit to operate from a negative ground power supply.

[mordechai]

Well, I've tried doing that, but the problem seems to be the common ground. when the NPN circuit is engaged, everything shorts out. 

[mth5044]

Picture of your wiring?

[slacker]

You must have something wired up wrong, that circuit is negative ground so you should be able to connect another negative ground circuit across 9V and ground. How are you connecting the PNP circuit?