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Aquababy24
Aquababy24
F
Delay
X Type:
Build Level: Intermediate
Based On: Boss® DM-2™
The 2024 version of the Aquababy has no circuit changes and some minor layout adjustments.
The PCB has been converted from a 2-layer to 4-layer design for low noise operation and the
project now offers a PCB mounted pot option.
The Aquababy is a faithful clone of the Boss® DM-2™ analog delay. It offers up to 300ms of analog
delay in a 1590B enclosure. The Aquababy is designed to utilize different BBD types (MN3205 or
MN3005) and clocks depending on availability and price. Minimal modifications are required to set
the build up for these different BBDs, and this will be explained in detail later on in this document.
MIX: The ratio of delay vs. clean signal.
FDBK: The number of delay repeats. Maximum FDBK setting will induce self-oscillation.
DELAY: Delay time from slap-back to about 300ms.
BIAS: Used to set the proper bias on the input of the MN3x05 for it to produce clean delay.
CANCEL: Sets the mix of the two delay outputs on the MN3x05.
CLOCK: Sets the correct clock frequency range produced by the MN310x to drive the BBD
delay lines in the MN3x05.
Terms of Use:
You are free to use purchased Aquababy24 circuit boards for both DIY and small commercial operations. You may not offer Aquababy24 PCBs for
resale or as part of a "kit" in a commercial fashion. Peer to peer re-sale is fine, though.
Technical assistance
for is available via the
available to respond via email in a timely and continuous manner, and (2) posting technical problems and solutions in the forum creates a record from which other
members may benefit.
All copyrights and registered trademarks are property of their original owners. Any mention of trademarked or intellectual properties in this documents is purely for
comparative purposes.
Overview
Controls
madbeanpedals
forum. Please go there rather than emailing me for personal assistance. This is because (1) I'm not always
Last Updated:
November 22, 2024 1:58 PM
© 2024
madbeanpedals

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Summary of Contents for madbeanpedals Aquababy24

  • Page 1 Terms of Use: You are free to use purchased Aquababy24 circuit boards for both DIY and small commercial operations. You may not offer Aquababy24 PCBs for resale or as part of a “kit” in a commercial fashion. Peer to peer re-sale is fine, though.
  • Page 2: Parts Layout

    Parts Layout Aquababy24 pg. 2...
  • Page 3: Component Values

    Component Values Aquababy24 pg. 3...
  • Page 4 Trace Layout - Outer Layers Aquababy24 pg. 4...
  • Page 5 Trace Layout - Inner Layers Aquababy24 pg. 5...
  • Page 6 Wiring The Aquababy24 is compatible with the SSBP bypass board available at madbeanpedals. Aquababy24 pg. 6...
  • Page 7 MPSA18 MPSA18 10uF 10uF 4558 220n NE570 470R 100pF MN3005 100k 10uF MN3101 Trimmers BIAS 330pF CANCEL CLOCK Pots DELAY 100k FDBK 50kB 100k 50kB 100k 330pF 220n 100pF 100n 100pF 100uF 100n 10uF *see notes 22uF Aquababy24 pg. 7...
  • Page 8: Shopping List

    Bourns 3362p or 6mm Bourns 3362p or 6mm PCB Right Angle 16mm 50kB PCB Right Angle 16mm Additional Hardware (1) 1590B enclosure (2) 1/4” mono jacks (1) Slim 2.1mm DC jack (1) Standard 3PDT footswitch (1) 5mm LED Aquababy24 pg. 8...
  • Page 9 This is the maximum delay setting. The clock frequency should land somewhere between 6 and 7 kHz but in some cases you may be able to go lower (meaning longer delay). Unless you are using an oscilloscope to calibrate the delay, leave the Cancel trim in the center position. Aquababy24 pg. 9...
  • Page 10: Circuit Voltages

    1.84 8.81 1.83 4.42 IC3 pins 1 and 5 will swap values and pin8 will be around 0.6V 2.97 1.84 1.84 MPSA18 3.04 9.48 3.04 4.38 1.84 3.96 MPSA18 9.48 1.84 9.48 1.84 2.95 0.98 2.36 Aquababy24 pg. 10...
  • Page 11: Drill Template

    Drill Template Coordinates are denoted in (X,Y), drill size format starting from the center (0,0) location of the enclosure. Tayda drill link: https://drill.taydakits.com/box-designs/new?public_key=RG02RlNoeEN1R2NzWXcxQkpxcHZzQT09Cg== Aquababy24 pg. 11...
  • Page 12 Build Pic Aquababy24 pg. 12...
  • Page 13 Schematic Aquababy24 pg. 13...

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