Akashic Guitar effects circuit lookup
INPUT LEVELRATEDEPTHTONECHORUS LEVEL

Enclosure not stated · 5 knobs

Experimentalists Anonymous

BOSS CE-300

Based on the Boss CE-300

Category
Vibrato / Chorus· Chorus
Controls
Input Level · Rate · Depth · Tone · Chorus Level
Price
see vendor
Tags
Chorus
Open the schematic at Experimentalists Anonymous

Schematic

The schematic is the archived file. Open it at Experimentalists Anonymous, or browse its folder.

Parts list 291 rows

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Check before you build · 7 values the reader of this schematic was not sure of
  • R50: printed R60; read as R50 since R60 is the 10K by R59 and this font's 5 looks like 6
  • R51: printed R61
  • R55: printed R66 (15K)
  • R106: printed R108 (47K, IC13b feedback), clashing with R108 39K
  • R115: printed R116 (1M at Q18), clashing with R116 220K
  • C46: printed C48 (10/16), clashing with C48 0.0068
  • C54: printed C64 (0.001), clashing with C64 0.033
RefValueNormalizedTypeNotes
Resistors 127
R110K10kread from the schematic by eye
R21M1Mread from the schematic by eye
R3100K100kread from the schematic by eye
R447K47kread from the schematic by eye
R54.7K4.7kread from the schematic by eye
R6470K470k220K struck out, 470K from SN481100 up; read from the schematic by eye
R747K47kread from the schematic by eye
R822K22k10K struck out, 22K from SN481100 up; read from the schematic by eye
R922022056 struck out, 220 given; read from the schematic by eye
R1168K68kread from the schematic by eye
R12100K100kread from the schematic by eye
R1347K47kread from the schematic by eye
R1447K47kread from the schematic by eye
R1547K47kread from the schematic by eye
R1610K10kread from the schematic by eye
R173.3K3.3kread from the schematic by eye
R18100K100kread from the schematic by eye
R1947K47kread from the schematic by eye
R201M1Mread from the schematic by eye
R2110K10kread from the schematic by eye
R22220220read from the schematic by eye
R2310K10kread from the schematic by eye
R2410K10kread from the schematic by eye
R2510K10kread from the schematic by eye
R2610K10kread from the schematic by eye
R2710K10kread from the schematic by eye
R2810K10kread from the schematic by eye
R2910K10kread from the schematic by eye
R30100K100kread from the schematic by eye
R3110K10kread from the schematic by eye
R3210K10kread from the schematic by eye
R33100K100kread from the schematic by eye
R34100K100kread from the schematic by eye
R35100K100kread from the schematic by eye
R36220220read from the schematic by eye
R37330K330kread from the schematic by eye
R3810K10kread from the schematic by eye
R3910K10kread from the schematic by eye
R4010K10kread from the schematic by eye
R4110K10kread from the schematic by eye
R4210K10kread from the schematic by eye
R4310K10kread from the schematic by eye
R444.7K4.7kread from the schematic by eye
R45100K100kread from the schematic by eye
R46100K100kread from the schematic by eye
R472.7K2.7kread from the schematic by eye
R48330K330kread from the schematic by eye
R4910K10kread from the schematic by eye
R5010K10kprinted R60 (the font's 5 reads as 6); R60 is the 10K beside R59; read from the schematic by eye
R51100K100kprinted R61; R61 is the 2.7K at Q7; read from the schematic by eye
R52100K100kread from the schematic by eye
R53100K100kread from the schematic by eye
R5447K47kread from the schematic by eye
R5515K15kprinted R66; read from the schematic by eye
R5633K33kread from the schematic by eye
R57100K100kread from the schematic by eye
R58100K100kread from the schematic by eye
R5910K10kread from the schematic by eye
R6010K10kread from the schematic by eye
R612.7K2.7kread from the schematic by eye
R62100K100kread from the schematic by eye
R63150K150kread from the schematic by eye
R644.7K4.7kread from the schematic by eye
R654.7K4.7kread from the schematic by eye
R6610K10kread from the schematic by eye
R6710K10kread from the schematic by eye
R6810K10kread from the schematic by eye
R694.7K4.7kread from the schematic by eye
R7010K10kread from the schematic by eye
R7110K10kread from the schematic by eye
R7222K22kread from the schematic by eye
R7310K10kread from the schematic by eye
R7447K47kread from the schematic by eye
R7547K47kread from the schematic by eye
R7610K10kread from the schematic by eye
R77100K100kread from the schematic by eye
R7968K68kread from the schematic by eye
R8168K68kread from the schematic by eye
R82100K100kread from the schematic by eye
R8310K10kread from the schematic by eye
R8410K10kread from the schematic by eye
R85330K330kread from the schematic by eye
R86330K330kread from the schematic by eye
R871M1Mread from the schematic by eye
R8847K47kread from the schematic by eye
R893.3K3.3kread from the schematic by eye
R9018K18kread from the schematic by eye
R9118K18kread from the schematic by eye
R9210K10kread from the schematic by eye
R9310K10kread from the schematic by eye
R9410K10kread from the schematic by eye
R9510K10kread from the schematic by eye
R961M1Mread from the schematic by eye
R97100K100kread from the schematic by eye
R98100K100kread from the schematic by eye
R99100K100kread from the schematic by eye
R1001K1kread from the schematic by eye
R101100K100kread from the schematic by eye
R102100K100kread from the schematic by eye
R10347K47kread from the schematic by eye
R10447K47kread from the schematic by eye
R10547K47kread from the schematic by eye
R10647K47kprinted R108, clashing with the 39K R108; R106 otherwise missing; read from the schematic by eye
R1071M1Mread from the schematic by eye
R10839K39kread from the schematic by eye
R109220K220kread from the schematic by eye
R11033K33kread from the schematic by eye
R11147K47kread from the schematic by eye
R11247K47kread from the schematic by eye
R11347K47kread from the schematic by eye
R11447K47kread from the schematic by eye
R1151M1Mprinted R116, clashing with the 220K R116; R115 otherwise missing; read from the schematic by eye
R116220K220kread from the schematic by eye
R1171M1Mread from the schematic by eye
R1181M1Mread from the schematic by eye
R1191M1Mread from the schematic by eye
R12047K47kread from the schematic by eye
R12139K39kread from the schematic by eye
R122100K100kread from the schematic by eye
R123100K100kread from the schematic by eye
R124100K100kread from the schematic by eye
R125100K100kread from the schematic by eye
R1261K1kread from the schematic by eye
R1276.8K6.8kread from the schematic by eye
R1282.2K2.2kread from the schematic by eye
R12910K10kread from the schematic by eye
R130470470SN513900 up; read from the schematic by eye
Capacitors 81
C10.047uF47nread from the schematic by eye
C210pF10pread from the schematic by eye
C31uF1uelectrolytic, 50V; read from the schematic by eye
C410uF10uelectrolytic, 16V; read from the schematic by eye
C51uF1uelectrolytic, 50V; read from the schematic by eye
C610uF10uelectrolytic, 16V; read from the schematic by eye
C70.0068uF6.8nread from the schematic by eye
C810uF10uelectrolytic, 16V; read from the schematic by eye
C91uF1uelectrolytic, 50V; read from the schematic by eye
C101uF1uelectrolytic, 50V; read from the schematic by eye
C11100uF100uelectrolytic, 16V; read from the schematic by eye
C1247uF47uelectrolytic, 16V; read from the schematic by eye
C131uF1uelectrolytic, 50V; read from the schematic by eye
C141uF1uelectrolytic, 50V; read from the schematic by eye
C151uF1uelectrolytic, 50V; read from the schematic by eye
C160.0027uF2.7n0.0022 struck out, 0.0027 from SN492600 up; read from the schematic by eye
C170.68uF680nelectrolytic; read from the schematic by eye
C181uF1uelectrolytic, 50V; read from the schematic by eye
C1910uF10uelectrolytic, 16V; read from the schematic by eye
C20470pF470pread from the schematic by eye
C210.0047uF4.7nread from the schematic by eye
C2247uF47uelectrolytic, 16V; read from the schematic by eye
C231uF1uelectrolytic, 50V; read from the schematic by eye
C241uF1uelectrolytic, 50V; read from the schematic by eye
C250.0039uF3.9nread from the schematic by eye
C260.033uF33nread from the schematic by eye
C2747pF47pread from the schematic by eye
C280.033uF33nread from the schematic by eye
C290.0068uF6.8nread from the schematic by eye
C30220pF220pread from the schematic by eye
C3147pF47pread from the schematic by eye
C320.018uF18nread from the schematic by eye
C3310uF10uelectrolytic, 16V; read from the schematic by eye
C340.68uF680nelectrolytic; read from the schematic by eye
C350.68uF680nelectrolytic; read from the schematic by eye
C3610uF10uelectrolytic, 16V; read from the schematic by eye
C370.018uF18nread from the schematic by eye
C380.0068uF6.8nread from the schematic by eye
C39220pF220pread from the schematic by eye
C4047pF47pread from the schematic by eye
C4147pF47pread from the schematic by eye
C420.01uF10nread from the schematic by eye
C4310uF10uelectrolytic, 16V; read from the schematic by eye
C4410uF10uelectrolytic, 16V; read from the schematic by eye
C4547uF47uelectrolytic, 16V; read from the schematic by eye
C4610uF10uelectrolytic, 16V; printed C48 beside the 0.0068 C48; read from the schematic by eye
C4710uF10uelectrolytic, 16V; read from the schematic by eye
C480.0068uF6.8nread from the schematic by eye
C490.0068uF6.8nread from the schematic by eye
C5010uF10uelectrolytic, 16V; read from the schematic by eye
C5147uF47uelectrolytic, 16V; read from the schematic by eye
C520.047uF47nread from the schematic by eye
C530.047uF47nread from the schematic by eye
C540.001uF1nprinted C64 (the 0.033 C64 is by R108); read from the schematic by eye
C550.027uF27nread from the schematic by eye
C560.027uF27nread from the schematic by eye
C570.001uF1nread from the schematic by eye
C5810uF10uelectrolytic, 16V; read from the schematic by eye
C5910uF10uelectrolytic, 16V; read from the schematic by eye
C6010uF10uelectrolytic, 16V; read from the schematic by eye
C6110uF10uelectrolytic, 16V; read from the schematic by eye
C6210uF10uelectrolytic, 16V; read from the schematic by eye
C630.01uF10nread from the schematic by eye
C640.033uF33nread from the schematic by eye
C650.01uF10nread from the schematic by eye
C660.033uF33nread from the schematic by eye
C670.033uF33nread from the schematic by eye
C680.047uF47nread from the schematic by eye
C6910uF10uelectrolytic, 16V; read from the schematic by eye
C7022uF22uelectrolytic, 16V; read from the schematic by eye
C7110uF10u16V, non-polar; read from the schematic by eye
C7247pF47pread from the schematic by eye
C7347pF47pread from the schematic by eye
C7410uF10u16V, non-polar; read from the schematic by eye
C7510uF10uelectrolytic, 16V; read from the schematic by eye
C7610uF10uelectrolytic, 16V; read from the schematic by eye
C77470uF470uelectrolytic, 35V; read from the schematic by eye
C78470uF470uelectrolytic, 16V; read from the schematic by eye
C791000uF1melectrolytic, 16V; read from the schematic by eye
C8010uF10uelectrolytic, 16V; read from the schematic by eye
PS-C10.01uF10nmains capacitor across the power-switch primary; ECQ-U1A103MH (100/117V) or ECQ-U2A103MF (220/240V); read from the schematic by eye
Diodes 25
D11S24731S2473from legend D1-21; read from the schematic by eye
D21S24731S2473from legend D1-21; read from the schematic by eye
D31S24731S2473from legend D1-21; read from the schematic by eye
D41S24731S2473from legend D1-21; read from the schematic by eye
D51S24731S2473from legend D1-21; read from the schematic by eye
D61S24731S2473from legend D1-21; read from the schematic by eye
D71S24731S2473from legend D1-21; read from the schematic by eye
D81S24731S2473from legend D1-21; read from the schematic by eye
D91S24731S2473from legend D1-21; read from the schematic by eye
D101S24731S2473from legend D1-21; read from the schematic by eye
D111S24731S2473from legend D1-21; read from the schematic by eye
D121S24731S2473from legend D1-21; read from the schematic by eye
D131S24731S2473from legend D1-21; read from the schematic by eye
D141S24731S2473from legend D1-21; read from the schematic by eye
D151S24731S2473from legend D1-21; read from the schematic by eye
D161S24731S2473from legend D1-21; read from the schematic by eye
D171S24731S2473from legend D1-21; read from the schematic by eye
D181S24731S2473from legend D1-21; read from the schematic by eye
D191S24731S2473from legend D1-21; read from the schematic by eye
D201S24731S2473from legend D1-21; read from the schematic by eye
D211S24731S2473from legend D1-21; read from the schematic by eye
D22W02W02bridge rectifier; read from the schematic by eye
D23RD16EB2RD16EB2zener; read from the schematic by eye
D24S5500GS5500Gread from the schematic by eye
D25RD7.5EB3RD7.5EB3zener; read from the schematic by eye
Transistors 20
Q12SC945-P2SC945-PNPN; read from the schematic by eye
Q22SC732TM-GR2SC732TM-GRNPN; read from the schematic by eye
Q32SC732TM-GR2SC732TM-GRNPN; read from the schematic by eye
Q42SC732TM-GR2SC732TM-GRNPN; read from the schematic by eye
Q52SC732TM-GR2SC732TM-GRNPN; read from the schematic by eye
Q62SC732TM-GR2SC732TM-GRNPN; read from the schematic by eye
Q72SC945-P2SC945-PNPN; read from the schematic by eye
Q82SC732TM-GR2SC732TM-GRNPN; read from the schematic by eye
Q92SC945-P2SC945-PNPN; read from the schematic by eye
Q102SC732TM-GR2SC732TM-GRNPN; read from the schematic by eye
Q112SC732TM-GR2SC732TM-GRNPN; read from the schematic by eye
Q122SK30ATM-GR2SK30ATM-GRJFET switch; read from the schematic by eye
Q132SK30ATM-GR2SK30ATM-GRJFET switch; read from the schematic by eye
Q142SK30ATM-GR2SK30ATM-GRJFET switch; read from the schematic by eye
Q152SK30ATM-GR2SK30ATM-GRJFET switch; read from the schematic by eye
Q162SK30ATM-GR2SK30ATM-GRJFET switch; read from the schematic by eye
Q172SC945-P2SC945-PNPN; read from the schematic by eye
Q182SK30ATM-GR2SK30ATM-GRJFET switch; read from the schematic by eye
Q192SC945-P2SC945-PNPN; read from the schematic by eye
Q202SD880-O2SD880-ONPN regulator pass transistor, drawn 2SD880-0; read from the schematic by eye
ICs 13
IC1M5218LM5218Ldual op amp; read from the schematic by eye
IC2IR2E02IR2E02LED level-meter driver; read from the schematic by eye
IC3NE570NE570compressor; or uPC1571C; read from the schematic by eye
IC4MN3007MN3007BBD; read from the schematic by eye
IC5MN3101MN3101BBD clock; read from the schematic by eye
IC6M5218LM5218Ldual op amp; read from the schematic by eye
IC7MN3007MN3007BBD; read from the schematic by eye
IC8MN3101MN3101BBD clock; read from the schematic by eye
IC9M5218LM5218Ldual op amp; read from the schematic by eye
IC10NE570NE570expander; or uPC1571C; read from the schematic by eye
IC11M5218LM5218Ldual op amp; read from the schematic by eye
IC12M5218LM5218Ldual op amp; read from the schematic by eye
IC13M5218LM5218Ldual op amp; read from the schematic by eye
Potentiometers 5
Input LevelB10KB10kPotentiometerVR1, drawn 10KB; read from the schematic by eye
RateC250KC250kPotentiometerVR2, drawn 250KC; read from the schematic by eye
DepthB100KB100kPotentiometerVR3, drawn 100KB; read from the schematic by eye
ToneA50KA50kPotentiometerVR4, dual gang, drawn 50KAx2; read from the schematic by eye
Chorus LevelB10KB10kPotentiometerVR5, dual gang, drawn 10KBx2; read from the schematic by eye
Trimmers 10
RT1B22K22kLED Level; read from the schematic by eye
RT2B22K22kTHD; read from the schematic by eye
RT3B22K22kBias-A; read from the schematic by eye
RT4B10K10kCancel-A; read from the schematic by eye
RT5B100K100kClock; read from the schematic by eye
RT6B10K10kCancel-B; read from the schematic by eye
RT7B22K22kBias-B; read from the schematic by eye
RT8B22K22kVCO Level; read from the schematic by eye
RT9B22K22kTHD-B; read from the schematic by eye
RT10B22K22kTHD-A; read from the schematic by eye
Switches 2
S1SPDTSPDTEffect On/Off, with R130 across it; read from the schematic by eye
S2DPDTDPDTDirect Mute, on JK board 1; read from the schematic by eye
LEDs 8
LED1-D1GL9PR2GL9PR2LED board 1; red, Effect On/Off; read from the schematic by eye
LED1-D2GL9NG2GL9NG2LED board 1; green, -20 level; read from the schematic by eye
LED1-D3GL9NG2GL9NG2LED board 1; green, -10 level; read from the schematic by eye
LED1-D4GL9HY2GL9HY2LED board 1; yellow, 0 level; read from the schematic by eye
LED1-D5GL9PR2GL9PR2LED board 1; red, +3 level; read from the schematic by eye
LED1-D6GL9PR2GL9PR2LED board 1; red, +6 level; printed D8; read from the schematic by eye
LED2-D1GL9PR2GL9PR2LED board 2; red, Mute; read from the schematic by eye
LED3-D1GL9PR2GL9PR2LED board 3; red, Power LED; read from the schematic by eye