Akashic Guitar effects circuit lookup
OUTPUTRELEASEDYNAMICSRAR

1590BBS · 4 knobs

Dead End FX

Sparsh V.2

Based on the Guyatone PS-025 Touch Overdrive· 1 other board clones it

Category
Overdrive· Overdrive, Compressor
Controls
Output · Release · Dynamics · Rar
Price
$15.00in stock

From the vendor

Clone of the Guyatone PS-025 Touch Overdrive. Another jewel from the Guyatone PS stable. We converted the original flip-flop type bypass to soft touch silent relay switching. Built in compressor, and Dynamics control, allows for a very nuanced overdrive. Does everything from mellow dirt, to all out screaming leads. One of the nicest overdrives ever produced. The lack of a tone control made us skeptical as to how well it would cover the ground between single coils and humbuckers, but it convinced us that it isn't necessary. If you want to spice up your tone, or just need to wake up a sleepy amp, this will do it. Boy... we sure do miss Guyatone.

The v.2 version supersedes the original board, which used the MV-57B chip for the bypass. This new board uses the Coda bypass scheme. The preprogrammed PIC chip is available here; http://www.deadendfx.com/product/coda-bypass-pic

Schematic

The schematic is in the vendor's build document, page 6. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 113 rows

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ocr read from an image · sch paired from the schematic · fixed corrected by hand. Check marked values against the build document.

RefValueNormalizedTypeNotes
Resistors 54
R2047ksch47k
R2122ksch22k
R22100ksch100k
R2310ksch10k
R24470rsch470
R252k2sch2.2k
R26470rsch470
R271msch1M
R2810ksch10k
R2910ksch10k
R30100ksch100k
R3110ksch10k
R3210ksch10k
R33220ksch220k
R3447ksch47k
R4110ksch10k
R4210ksch10k
R431msch1M
R44100ksch100k
R45470ksch470k
R461msch1M
R4715ksch15k
R4847ksch47k
R493k6sch3.6k
R50100ksch100k
R5110ksch10k
R521ksch1k
R53100ksch100k
R110ksch10k
R21ksch1k
R310ksch10k
R71msch1M
R810ksch10k
R947ksch47k
R1010ksch10k
R1147ksch47k
R122k7sch2.7k
R1310ksch10k
R141ksch1k
R1510ksch10k
R1647ksch47k
R17100ksch100k
R184k7sch4.7k
R1910ksch10k
R3510ksch10k
R3647ksch47k
R37100ksch100k
R3862rsch62
R3910ksch10k
R4010ksch10k
R561ksch1k
R571k5sch1.5k
R5810ksch10k
R5910ksch10k
Capacitors 31
C133u3sch3.3u
C141usch1u
C221usch1u
C231usch1u
C2433nsch33n
C2515nsch15n
C261usch1u
C2718nsch18n
C2847nsch47n
C291usch1u
C301usch1u
C122nsch22n
C2100usch100u
C347usch47u
C4100nsch100n
C5100nsch100n
C610usch10u
C822nsch22n
C91usch1u
C1022nsch22n
C1147nsch47n
C12220nsch220n
C1522nsch22n
C1622nsch22n
C172n2sch2.2n
C181usch1u
C191n5sch1.5n
C201usch1u
C212n7sch2.7n
C31100psch100p
C32100psch100p
Diodes 11
D51n4148sch1N4148
D71n4148sch1N4148
D81n4148sch1N4148
D101n4148sch1N4148
D111n4148sch1N4148
D121n4148sch1N4148
D131n4148sch1N4148
D11n4148sch1N4148
D21n4001sch1N4001
D61n4148sch1N4148
D141N4148ocr1N4148
Transistors 4
Q1BC549BocrBC549B
Q22N5089ocr2N5089
Q3BC549BocrBC549B
Q4BC549BocrBC549B
ICs 5
IC11TLP222GocrTLP222G
IC34558ocr4558
IC44558ocr4558
IC54558ocr4558
IC6CA3080ocrCA3080
Potentiometers 4
OutputB50KschB50kPotentiometer
ReleaseB1MschB1MPotentiometer
DynamicsB100KschB100kPotentiometer
RARA7KocrA7kPotentiometer
Trimmers 3
TRIM1100ksch100k
TRIM2100ksch100k
TRIM32k2sch2.2k
Switches 1
MomentarySPSTocrSPST

Other boards based on the Guyatone PS-025 Touch Overdrive