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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.

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.

Layout &Traces

Summary of Contents for AQB_MOD 2019

Page 1: ...sistor 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 p...

Page 2: ...l Film 1 8W R5 2k2 220k 5 Carbon Metal Film 1 8W R6 1k 10n 1 Film MLCC 16v min R7 1k 22uF 2 Electrolytic 16v min R8 220k LED 2 Red Diffused 3mm R9 47k 1N4001 1 R10 4k7 9203 1 Photocell Caps SW 1 SPDT On On C1 10n 100kC 1 9mm or 3362p Trimmer C2 22uF 100kB 1 9mm or 3362p Trimmer C3 22uF Diodes D1 LED D2 1N4001 LED LED Photocell LDR1 9203 IC IC1 TL062 Switch SW SPDT Pots RATE 100kC DEPTH 100kB ...

Page 3: ...a ones https www taydaelectronics com resistors photoresistors photo conductive cell resis tor ldr 650nm radial ke 10720 html SPDT Mini On On http smallbear electronics mybigcommerce com spdt on on mountain 10tc410 SPDT regular size On On http smallbear electronics mybigcommerce com spdt on on short lever Low profile Electrolytic cap 22uF http smallbear electronics mybigcommerce com electrolytic r...

Page 4: ...ot want the flasher Experimental It s possible to hook up the Mod board without the switch to turn modulation off To do so wire the Mod pad on the AQB_ MOD PCB directly to the M pad on the Aquaboy PCB Make R9 220k instead of 47k When you turn the Depth pot all the way down the modulation should go most of the way off You may still hear a very slight amount though Wiring2 This wiring shows the pots...

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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