A charge pump power supply
Lots of capacitors, This circuit generates approimately +/-24V from a 9-volt battery. The 24 volts will be fed into an op-amp controlled regulator to generate a steady +/-12v with enough headroom to allow a decent amount of current without sagging.
The capacitors are pumped using a simple 555 timer configured to generate a 15kHz signal. This would not be appropriate to power anything audio, but would work fine for experimentation. Partially this is due to the slow switching of the diodes; I don't have the appropriate shottky diodes to allow for a higher pump frequency, and this is on a breadboard, which has much higher parasitic capacitance than other circuit wiring methods.
A charge pump power supply
Lots of capacitors, This circuit generates approimately +/-24V from a 9-volt battery. The 24 volts will be fed into an op-amp controlled regulator to generate a steady +/-12v with enough headroom to allow a decent amount of current without sagging.
The capacitors are pumped using a simple 555 timer configured to generate a 15kHz signal. This would not be appropriate to power anything audio, but would work fine for experimentation. Partially this is due to the slow switching of the diodes; I don't have the appropriate shottky diodes to allow for a higher pump frequency, and this is on a breadboard, which has much higher parasitic capacitance than other circuit wiring methods.