DC-DC Bipolar Power Supply for Effect Pedals
Certain circuits require a bipolar power supply. In a portable unit like an effect pedal, that can sometimes be troublesome, since it is likely that we want to power our effects with a standard 9V or 12V wall-wart or batteries and really don’t like the idea of putting an AC mains transformer plus rectifiers and filtering into our boxes.
A good way getting around this problem is by using a step-up converter, also called DC-DC converter. A DC-DC converter converts a voltage level into another voltage level by temporarily storing the energy in a capacitor or an inductor and then releasing the energy to the output thus multiplying the output voltage.
I have used the LT3467 converter in a 9V input to +-15V output configuration. The schematic is similar to the one in the LT 3467 datasheet, which you can refer to, would you require to calculate a different voltage output level. Which by the way, is set with only two resistors (R1 and R2).
Read More...http://obsoletetechnology.wordpress.com/projects/studio-electronics/dc-dc-bipolar-power-supply-for-effect-pedals/
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