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Mad Bean Pedals 3PRR Quick Start Manual

Fx type: utility
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3PRR
FX TYPE: Utility
© 2015 madbeanpedals
1.815"W x 1.11"H
2015 change-log: Removed 10R current limiting resistor.
This PCB is designed for the typical BLUE 3PDT footswitch. Other
footswitches may or may not fit into the pad spacing allotted.
Terms of Use: You are free to use purchased 3PRR circuit boards for both DIY and
small commercial operations. You may not offer 3PRR boards for resale or as part of a
"kit" in a commercial fashion. Peer to peer re-sale is, of course, okay.

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Summary of Contents for Mad Bean Pedals 3PRR

  • Page 1 Terms of Use: You are free to use purchased 3PRR circuit boards for both DIY and small commercial operations. You may not offer 3PRR boards for resale or as part of a...
  • Page 2 Resistors Value Type Rating Carbon / Metal Film 1/4W Caps 100n Film / MLCC 47uF 10uF Electrolytic 100n 47uF Electrolytic 10uF 1N5817 10uF Zener 9.1/12/15v 10uF LM78L15 T0-92 10uF Charge Pump *see notes 10uF 3mm or 5mm Diodes 3PDT Solder Lug Footswitch 1N5817 Zener 1N5817...
  • Page 3 1590B 4.43”W x 6.47”H This is the top down view looking at the front face of the 1590B enclosure.
  • Page 4 The 3PRR is a combination of two utility circuits onto a single PCB: a charge pump / voltage inverter and bypass switcher. The switching mechanism is true bypass with effect input grounded, and the charge pump section can provide + or – 9v, +18v (unregulated) and/or +15v (or +12v) regulated. All outputs can be used simultaneously, if needed, so long as the circuit load does not exceed the current supply available through the charge pump.
  • Page 5 (like an analog delay or Univibe) will have higher current consumption. In those cases, the LT1054 is necessary. Zener Diode: This diode will protect your IC from an over-voltage supply. This is optional (the 3PRR work without it) but if you need to protect the circuit from using a wrong power supply, then use this list to determine what value Zener to use.
  • Page 6 How to use the Road Rage: I need -9v output to power a fuzz circuit Solder D1, D2, C1, C2, C5 and C6 to the PCB. Omit D3, D4, C4, C7, and REG . Connect your DC jack to the “DC” pads and take your output from the -9/G pins (-9v and ground). BTW: ground is ground.

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