Mad Bean Pedals Promenade User manual

PromenadePromenade
FX TYPE: Filter
Based on the EHX® Bass Balls™
Enclosure Size: 125B
“Softie” compatibility: Softie 3
© 2022 madbeanpedals
Overview
The Promenade is an envelope lter based on the EHX® Bass Balls™. I’ve included some of the
mods suggested by Mark Hammer on the DIYSB forum. These mods give the builder more control
over how the envelope behaves as well as the bass and treble frequency response.
This should be an easy project for most builders. There’s nothing tricky, nothing to be tweaked to
taste or in need of further modication, IMO. It sounds great on bass, baritone and guitar.
Controls
• BASS, TREB - Sets the frequency range of the swept lter for the low and high end.
• SENSE - The sensitivity of the envelope lter. This controls how much signal is used to trigger
the envelope. There will be a couple of “sweet spots” depending on the instrument used (passive/
active bass, etc).
• ATTACK, DECAY - These controls determine the overall shape of the envelope note. Turning
them up will increase the attack of the envelope and make the decay of the envelope much
longer. Attack, Decay and Sense all work together to o󰀨er a wide range of envelope control.
• CLEAN/DIST - Left position is clean signal out. Right position adds two silicon diodes to ground
for some hard clipped distortion.
Terms of Use: You are free to use purchased Promenade circuit boards for both DIY and small commercial operations. You may not
oer Promenade PCBs for resale or as part of a “kit” in a commercial fashion. Peer to peer re-sale is ne, though.
Technical assistance for your build(s) is available via the madbeanpedals forum. Please go there rather than emailing me for
assistance on builds. This is because (1) I’m not always 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 benet.

Parts Promenade
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Values Promenade
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Traces Promenade
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B.O.M. Promenade
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Resistors Caps Diodes
R1 2M2 C1 47n D1 1n914
R2 220k C2 10uF D2 1n4001
R3 2k7 C3 470n D3 1n4001
R4 4k7 C4 4u7 D4 1n4001
R5 2M2 C5 220n Transistors
R6 220k C6 47n Q1 2N5088
R7 100R C7 560pF Q2 2N5088
R8 47k C8 220n Q3 2N5088
R9 3k3 C9 22n ICs
R10 100k C10 22n IC1 LM1458
R11 470k C11 4n7 IC2 4558
R12 470k C12 4n7 Switches
R13 2k7 C13 560pF DIST On/On
R14 220k C14 100uF Pots
R15 2k7 C15 100n ATTACK 1kB
R16 4k7 C16 100n BASS 5kB
R17 22k C17 100uF TREB 5kB
R18 47k SENSE 10kB
R19 4k7 DECAY 1MB
R20 22k
R21 47k
R22 470k
R23 27k
R24 470k
R25 4k7
R26 22R
R27 47k
R28 47k

Shopping List Promenade
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Value QTY Type Rating
22R 1Carbon / Metal Film 1/4W
100R 1Carbon / Metal Film 1/4W
2k7 3 Carbon / Metal Film 1/4W
3k3 1 Carbon / Metal Film 1/4W
4k7 4 Carbon / Metal Film 1/4W
22k 2 Carbon / Metal Film 1/4W
27k 1 Carbon / Metal Film 1/4W
47k 5 Carbon / Metal Film 1/4W
100k 1 Carbon / Metal Film 1/4W
220k 3 Carbon / Metal Film 1/4W
470k 4 Carbon / Metal Film 1/4W
2M2 2 Carbon / Metal Film 1/4W
560pF 2Ceramic / MLCC 16v min.
4n7 2 Film 16v min.
22n 2 Film 16v min.
47n 2 Film 16v min.
100n 2 Film 16v min.
220n 2 Film 16v min.
470n 1 Film 16v min.
4u7 1 Electrolytic 16v min.
10uF 1 Electrolytic 16v min.
100uF 2 Electrolytic 16v min.
1n914 1
1n4001 3
2N5088 3
LM1458 1
4558 1
SPDT 1On/On, Solder Lug or Pin Mount
1kB 1 PCB Right Angle 16mm
5kB 2 PCB Right Angle 16mm
10kB 1 PCB Right Angle 16mm
1MB 1 PCB Right Angle 16mm

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Parts Guide Promenade
LM1458:
https://stompboxparts.com/semiconductors/lm1458n-dual-op-amp-ic/
https://www.mouser.com/ProductDetail/595-MC1458P
SPDT (On/On):
https://smallbear-electronics.mybigcommerce.com/spdt-on-on-short-lever/
https://stompboxparts.com/switches/spdt-toggle-switch-on-on-solder-lug-short-bat/
https://lovemyswitches.com/spdt-on-on-switch-solder-lug-short-shaft/
16mm pots:
https://smallbear-electronics.mybigcommerce.com/alpha-single-gang-16mm-right-angle-pc-mount/
https://stompboxparts.com/pots/16mm-potentiometer-short-pcb-leg/
https://lovemyswitches.com/16mm-potentiometers-1-4-smooth-shaft-right-angle-pcb-mount/
DC Jacks:
https://smallbear-electronics.mybigcommerce.com/2-1-mm-all-plastic-round/
https://stompboxparts.com/power-connections/dc-power-jack-2-1mm-low-prole/
https://lovemyswitches.com/thinline-lumberg-dc-power-jack-2-1mm/
1/4” jacks:
https://smallbear-electronics.mybigcommerce.com/1-4-in-mono-nys229/
https://smallbear-electronics.mybigcommerce.com/1-4-in-mono-switchcraft-11/
https://lovemyswitches.com/1-4-mono-jack-lumberg-klbm-3/
https://lovemyswitches.com/1-4-mono-jack-neutrik-rean-nys229/
My preferred 3PDT switch:
https://lovemyswitches.com/pro-3pdt-latched-foot-switch-solder-lugs-feather-soft-click/

Notes Promenade
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- None.

Wiring Diagram Promenade
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The LED is soldered directly to the PCB. You should do this as a “last
step” after the PCB is mounted to your enclosure.

125B Drill Guide Promenade
Note: Drill Guides are approximate and may require tweaking depending on the types of jacks, switches and pots you use.
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With 3PDT bypass. LED soldered directly to the Promenade PCB.

125B Drill Guide Promenade
Note: Drill Guides are approximate and may require tweaking depending on the types of jacks, switches and pots you use.
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With Softie3 bypass. LED soldered to the Softie3 PCB.
NOTE: You can move the footswitch location further up if you prefer.

Voltages Promenade
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• 9.42vDC One Spot
• Current Draw: 4mA
• Testing Conditions: All knobs about
1/2 up
IC1 LM1458 Q1 2n5088
14.69 C9.4
24.69 B1.71
34.59 E1.14
4 0 Q2 2n5088
5 0 C 4mV
6 1.89 B 425mV
7 2 E 0
89.4 Q3 2n5088
IC2 4558 C 4mV
14.69 B 475mV
24.7 E 0
34.69
4 0
54.69
6 4.69
74.68
89.4

Build Pic Promenade
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Schematic
Promenade
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