Charge Pumps


Here are some board layouts for practical application of the nice little charge pump circuits from the GEOFEX site.  Both PCBs take a typical 9 volt input.  The first one gives three stages of higher voltages from the 9v input, great for lots of effects. The second one gives bipolar 9v output (9v+, 9v- and ground ref from  9v, ground input).  This is great for the Anderton projects and others.


Higher Voltage Output


Bipolar Power Output


Positive Ground Power (Some PNP Transistors Circuits)

Another good use of the Bipolar charge pump is to deliver positive ground power from a negative ground power input. If you daisy chain power to your pedal board, this will allow you to add your PNP pedals with no special power supplies. Here are some examples of this use.


Buy A Bipolar CP Kit

Buy a Charge Pump (Bipolar) Complete Kit. Includes all the parts and materials you need to build one, including the PCB.


Buy A Bipolar CP PCB

Would you like a Ready to Solder Circuit Board for this project (9volt Bipolar Power Charge Pump)?


Buy A Volatge UP CP PCB

Would you like a Ready to Solder Circuit Board for this project (17, 25 or 33 volt Charge Pump)?