Charge Pumps
Charge Pumps are an easy way to get dual power (bi-polar power) supply from a single 9 volt source or to get higher voltages out of 9 volts. Here are practical applications 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 9 volt input. The second one gives bipolar 9 volt output. That is 9v+, 9v- and ground reference from a single 9 volt source or a single 9 volt battery. This is great for some of the Craig Anderton projects and any others that use bipolar power supplies.
Higher Voltage Output
- 17, 25 or 33 volt power board schematic
- 17, 25 or 33 volt power board layout
- 17, 25 or 33 volt power Ready-For-Transfer Printed Circuit Board mask
Bipolar Power Output
- Bipolar power board schematic
- Bipolar power board layout
- Bipolar power board layout with no power switching
- Bipolar power Ready-For-Transfer Printed Circuit Board mask
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.
- Negative ground power to a positive ground PNP Dallas Aribier Fuzz Face circuit.
- Negative ground power to a positive ground PNP Dallas Aribiter Rangemaster Replica circuit.
- Negative ground power to a positive ground PNP ColorSound ToneBender Mark II Pro Replica circuit.
- Negative ground power to a positive ground PNP ColorSound ToneBender (3-knob) Replica circuit.
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 Voltage UP CP PCB
Would you like a Ready to Solder Circuit Board for this project (17, 25 or 33 volt Charge Pump)?
