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Mad Bean Pedals AQB_MOD 2019 Quick Start Manual

Fx type: delay modulation
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The AQB_MOD is an add-on board to enable modulation on the Aquaboy (DM-2) project. For the
2019 version, I've added an optional LED that displays the modulation rate and an additional resistor
to prevent the depth control from being too extreme.

Controls

•
RATE: Sets modulation rate from slow to fast.
•
DEPTH: Sets modulation depth from min to max.
•
SW: Switches the modulation on and off.
Terms of Use: You are free to use purchased AQB_MOD circuit boards for both DIY and small commercial operations. You may not
offer AQB_MOD PCBs for resale or as part of a "kit" in a commercial fashion. Peer to peer re-sale is fine, though.
AQB_MOD 2019
Layout &Traces
FX TYPE: delay modulation
© 2019
madbeanpedals

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Summary of Contents for Mad Bean Pedals AQB_MOD 2019

  • Page 1 AQB_MOD 2019 FX TYPE: delay modulation © 2019 madbeanpedals The AQB_MOD is an add-on board to enable modulation on the Aquaboy (DM-2) project. For the 2019 version, I’ve added an optional LED that displays the modulation rate and an additional resistor to prevent the depth control from being too extreme.
  • Page 2 B.O.M. B.O.M. Shopping List Resistors Value Type Rating 220k Carbon / Metal Film 1/8W 220k Carbon / Metal Film 1/8W 220k Carbon / Metal Film 1/8W 220k Carbon / Metal Film 1/8W 220k Carbon / Metal Film 1/8W Film / MLCC 16v min.
  • Page 3 Parts You can use either metal shaft 9mm pots or trimmers for the Rate and Depth control. Pots obviously give you the ability to dial in all kinds of different modulation. But, if you one just one type of modula- tion (say a slow, subtle modulation on longer delays) then trimmers allow you to just “set and forget”...
  • Page 4 Wiring1 This wiring shows external pots, SPDT switch to turn the modulation on and off and external LED that flashes in time with the Rate setting. Connect the wire from the SPDT to the “M” pad on the Aquaboy. Note 1: in this case, connect pads 2 and 1 of the Depth pot on the AQB_MOD PCB as shown. Note2: you can just leave the external LED off if you do not want the flasher.
  • Page 5 125B Drill Guide The AQB_MOD board has to fit under the Aquaboy PCB. Use some 3m foam tape to securely affix it to the enclosure. You could also use velcro!
  • Page 6 Schematic...

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