Enclosure not stated · 4 knobs

BOSS CE-1

Based on the Boss CE-1· 3 other boards clone it

Category: Vibrato / Chorus· Chorus
Controls: Level · Chorus Intensity · Depth · Rate
Price: see vendor
Tags: Chorus

Open the schematic at Experimentalists Anonymous

Schematic

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Parts list 181 rows

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Check before you build · 6 values the reader of this schematic was not sure of

R88: printed like 1.9K, read 1.8K
R90: designator unclear
R99: could be R89
R76: 18K or 19K
C47: printed like 270/35V, read 220uF
C48 and D13 each printed twice

Ref	Value	Normalized	Type	Notes
Resistors 87
R01	4.7K	4.7k		read from the schematic by eye
R02	1.8K	1.8k		read from the schematic by eye
R03	56K	56k		read from the schematic by eye
R04	100K	100k		read from the schematic by eye
R05	680	680		read from the schematic by eye
R06	330K	330k		read from the schematic by eye
R07	10K	10k		read from the schematic by eye
R8	10K	10k		read from the schematic by eye
R10	470	470		read from the schematic by eye
R11	470K	470k		read from the schematic by eye
R12	10K	10k		read from the schematic by eye
R13	22K	22k		read from the schematic by eye
R14	10K	10k		read from the schematic by eye
R15	10K	10k		read from the schematic by eye
R16	10K	10k		read from the schematic by eye
R17	470	470		read from the schematic by eye
R18	10K	10k		read from the schematic by eye
R19	8.2K	8.2k		read from the schematic by eye
R20	10K	10k		read from the schematic by eye
R21	100K	100k		read from the schematic by eye
R22	10K	10k		read from the schematic by eye
R23	1K	1k		read from the schematic by eye
R24	100K	100k		read from the schematic by eye
R25	100K	100k		read from the schematic by eye
R26	6.8K	6.8k		read from the schematic by eye
R27	6.8K	6.8k		read from the schematic by eye
R28	47K	47k		read from the schematic by eye
R29	47K	47k		read from the schematic by eye
R30	2.2K	2.2k		read from the schematic by eye
R31	33K	33k		read from the schematic by eye
R32	33K	33k		read from the schematic by eye
R33	2.2K	2.2k		read from the schematic by eye
R34	33	33		read from the schematic by eye
R35	1K	1k		read from the schematic by eye
R36	100K	100k		read from the schematic by eye
R37	47K	47k		read from the schematic by eye
R38	470	470		read from the schematic by eye
R39	47K	47k		read from the schematic by eye
R40	10K	10k		read from the schematic by eye
R41	22K	22k		read from the schematic by eye
R42	6.8K	6.8k		read from the schematic by eye
R43	15K	15k		read from the schematic by eye
R44	15K	15k		read from the schematic by eye
R46	10K	10k		read from the schematic by eye
R47	12K	12k		read from the schematic by eye
R48	2.2K	2.2k		read from the schematic by eye
R49	1.5K	1.5k		read from the schematic by eye
R50	100K	100k		read from the schematic by eye
R51	4.7K	4.7k		could be R61 but R61 is used elsewhere; read from the schematic by eye
R52	3.3K	3.3k		could be R62 but R62 is used elsewhere; read from the schematic by eye
R53	3.3K	3.3k		read from the schematic by eye
R54	4.7K	4.7k		read from the schematic by eye
R55	1M	1M		read from the schematic by eye
R56	10K	10k		read from the schematic by eye
R57	100K	100k		read from the schematic by eye
R58	8.2K	8.2k		read from the schematic by eye
R59	1K	1k		read from the schematic by eye
R60	1M	1M		read from the schematic by eye
R61	10K	10k		read from the schematic by eye
R62	10K	10k		read from the schematic by eye
R63	4.7K	4.7k		read from the schematic by eye
R64	3.9K	3.9k		read from the schematic by eye
R65	1.5K	1.5k		read from the schematic by eye
R66	22K	22k		read from the schematic by eye
R67	4.7K	4.7k		read from the schematic by eye
R68	330K	330k		read from the schematic by eye
R69	10K	10k		read from the schematic by eye
R70	100K	100k		read from the schematic by eye
R71	10K	10k		read from the schematic by eye
R72	3.3K	3.3k		read from the schematic by eye
R73	470K	470k		read from the schematic by eye
R75	33K	33k		read from the schematic by eye
R76	18K	18k		could be 19K; read 18K; read from the schematic by eye
R77	2.2K	2.2k		read from the schematic by eye
R78	8.2K	8.2k		read from the schematic by eye
R79	4.7K	4.7k		read from the schematic by eye
R80	180K	180k		180K with CA1458G (120K with uPC1458), per the drawing's note; read from the schematic by eye
R81	220K	220k		220K with CA1458G (150K with uPC1458), per the drawing's note; read from the schematic by eye
R82	100K	100k		read from the schematic by eye
R83	1.8K	1.8k		read from the schematic by eye
R84	10K	10k		read from the schematic by eye
R85	10K	10k		read from the schematic by eye
R86	15K	15k		read from the schematic by eye
R87	2.2K	2.2k		read from the schematic by eye
R88	1.8K	1.8k		printed like 1.9K; 1.8K matches R83; read from the schematic by eye
R90	2.2K	2.2k		designator could be R50/R59-style misprint; read R90; read from the schematic by eye
R99	220K	220k		could be R89; read from the schematic by eye
Capacitors 43
C01	.001uF	1n		read from the schematic by eye
C02	1uF	1u		electrolytic; read from the schematic by eye
C03	1uF	1u		electrolytic; read from the schematic by eye
C06	100pF	100p		read from the schematic by eye
C07	.47uF	470n		non-polar; read from the schematic by eye
C09	.0068uF	6.8n		read from the schematic by eye
C4	47uF	47u		16V electrolytic (PSU); read from the schematic by eye
C10	47uF	47u		16V electrolytic (PSU); read from the schematic by eye
C11	.001uF	1n		read from the schematic by eye
C12	.0047uF	4.7n		read from the schematic by eye
C13	10uF	10u		16V; read from the schematic by eye
C14	.1uF	100n		read from the schematic by eye
C15	10uF	10u		16V; read from the schematic by eye
C16	10uF	10u		16V; read from the schematic by eye
C17	470uF	470u		16V; read from the schematic by eye
C18	250pF	250p		read from the schematic by eye
C19	250pF	250p		read from the schematic by eye
C20	47pF	47p		read from the schematic by eye
C21	47pF	47p		read from the schematic by eye
C22	1uF	1u		electrolytic; read from the schematic by eye
C23	.033uF	33n		read from the schematic by eye
C26	.0047uF	4.7n		read from the schematic by eye
C28	.001uF	1n		read from the schematic by eye
C29	.001uF	1n		read from the schematic by eye
C30	.47uF	470n		electrolytic; read from the schematic by eye
C31	0.47uF	470n		non-polar; read from the schematic by eye
C32	.022uF	22n		read from the schematic by eye
C33	.022uF	22n		read from the schematic by eye
C34	10uF	10u		16V; read from the schematic by eye
C35	4.7uF	4.7u		electrolytic; read from the schematic by eye
C37	470pF	470p		read from the schematic by eye
C38	.1uF	100n		read from the schematic by eye
C39	1uF	1u		electrolytic; read from the schematic by eye
C40	.1uF	100n		read from the schematic by eye
C41	.033uF	33n		read from the schematic by eye
C42	.047uF	47n		drawn with a + sign; read from the schematic by eye
C43	.082uF	82n		read from the schematic by eye
C44	220uF	220u		electrolytic (PSU); read from the schematic by eye
C46	220uF	220u		35V; read from the schematic by eye
C47	220uF	220u		35V; printed like 270/35V; read from the schematic by eye
C48	220uF	220u		16V (near Q16); read from the schematic by eye
C48	220uF	220u		second C48 printed in the PSU (beside C44); designator clash on the drawing; read from the schematic by eye
C49	220uF	220u		16V; read from the schematic by eye
Diodes 19
D01	1S1555	1S1555		read from the schematic by eye
D02	1S1555	1S1555		read from the schematic by eye
D03	1S1555	1S1555		read from the schematic by eye
D04	1S1555	1S1555		read from the schematic by eye
D05	1S1555	1S1555		read from the schematic by eye
D06	1S1555	1S1555		read from the schematic by eye
D07	1S1555	1S1555		read from the schematic by eye
D08	1S1555	1S1555		read from the schematic by eye
D09	1S1555	1S1555		by legend 'all diodes 1S1555 unless noted'; drawn like a zener; read from the schematic by eye
D11	1S1555	1S1555		read from the schematic by eye
D12	1S1555	1S1555		read from the schematic by eye
D13	1S1555	1S1555		LFO rectifier beside R68; read from the schematic by eye
D13	1S1555	1S1555		second D13 printed in the PSU (with D14); designator clash on the drawing; read from the schematic by eye
D14	1S1555	1S1555		read from the schematic by eye
D15	05Z15A	05Z15A		zener; read from the schematic by eye
D16	1N4003	1N4003		read from the schematic by eye
D17	1N4003	1N4003		read from the schematic by eye
D18	1N4003	1N4003		read from the schematic by eye
D19	1N4003	1N4003		read from the schematic by eye
Transistors 17
Q1	2SC900	2SC900		read from the schematic by eye
Q2	2SC900	2SC900		read from the schematic by eye
Q3	2SA493	2SA493		read from the schematic by eye
Q4	2SA493	2SA493		read from the schematic by eye
Q5	2SC536F	2SC536F		read from the schematic by eye
Q6	2SC536F	2SC536F		read from the schematic by eye
Q7	2SC900	2SC900		read from the schematic by eye
Q8	2SA733	2SA733		read from the schematic by eye
Q9	2SA733	2SA733		read from the schematic by eye
Q10	2SC900	2SC900		read from the schematic by eye
Q11	?	?		JFET; type not given in the legend; read from the schematic by eye
Q12	?	?		JFET; type not given in the legend; read from the schematic by eye
Q13	?	?		JFET; type not given in the legend; read from the schematic by eye
Q14	2SA733	2SA733		read from the schematic by eye
Q15	2SD234	2SD234		read from the schematic by eye
Q16	2SC900	2SC900		read from the schematic by eye
Q17	2SB434	2SB434		read from the schematic by eye
ICs 4
IC1	TA7504S	TA7504S		op amp; read from the schematic by eye
IC2	MN3002	MN3002		BBD; read from the schematic by eye
IC3	TA7504S	TA7504S		op amp; read from the schematic by eye
IC4	CA1458G	CA1458G		dual op amp; uPC1458 alternative; read from the schematic by eye
Potentiometers 4
Level	A50K	A50k	Potentiometer	VR11 (input level control); read from the schematic by eye
Chorus Intensity	B10K	B10k	Potentiometer	VR12; read from the schematic by eye
Depth	B50K	B50k	Potentiometer	VR13; read from the schematic by eye
Rate	C100K	C100k	Potentiometer	VR14, C taper; read from the schematic by eye
Trimmers 1
VR01	B5K	5k		5KB trimmer at the MN3002 output; read from the schematic by eye
Switches 4
S1	DPDT	DPDT		input High/Low; read from the schematic by eye
S2	DPST	DPST		power; read from the schematic by eye
S3	SPDT	SPDT		Effect/Normal; read from the schematic by eye
S4	?	?		Chorus/Vibrato, multi-pole (dashed linkage); read from the schematic by eye
LEDs 2
D101	SLP-24B	SLP-24B		peak level; read from the schematic by eye
D102	SLP-24B	SLP-24B		peak level; read from the schematic by eye

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