Eurorack Dual LFO

Len42·Synth·modules/LFO-Analog/LFO-Analog.kicad_pcb

Eurorack Dual LFO is an open source PCB design by Len42: a 2-layer, 50.5 × 108.2 mm board with 79 components (30 distinct parts). It is built around the TL074. Filed under audio.

Eurorack synthesizer module designs

PCB layouts are provided in KiCad and gerber formats. A PCB layout for a drilled front panel (with no labels) is also included.

The PCBs that I used can be ordered from OSH Park. The designs are here: - Front panel - Controls board - Main board

There is a parts list in spreadsheet-friendly text format.

Please note that I am a hobbyist, not a trained electronics engineer. No guarantees!

Eurorack Dual LFO, from the project README — From the project README

Built around

TL074

Parts list

79 components, 30 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
2	TL074 Texas Instruments	DIP-14_W7.62mm	U1, U2
4	2N3904 Central Semiconductor	TO-92_Inline_Wide	Q1, Q2, Q3, Q4
4	WQP-PJ398 QingPu / Thonk	Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical	J1, J2, J3, J4
1	CONN_EURORACK_10 Conn_Eurorack_10 Wurth Elektronik	IDC-Header-Eurorack-10-TH	J5
1	Conn_Front	PinSocket_1x17_P2.54mm_Vertical	J6
1	Conn_Back	PinHeader_1x17_P2.54mm_Horizontal	J7
2	25K Bourns	Potentiometer_Bourns_3296W_Vertical	RV1, RV2
2	100K Alpha	Potentiometer_Alpha_RD901F-40-00D_Single_Vertical	RV3, RV4
2	SPDT_ON_ON Mountain Switch	SW_SPDT_THT_2.54	SW1, SW2
2	LED_3MM_BLUE LED_3mm_Blue Kingbright	LED_D3.0mm_Clear	D1, D2
2	10N KEMET	C_Rect_Kemet_L7.2mm_W2.5mm_P5mm	C1, C5
2	470N KEMET	C_Rect_L7.2mm_W4.5mm_P5.00mm	C2, C6
2	47P Vishay	C_Disc_D5.0mm_W2.5mm_P2.50mm	C3, C7
2	3N3 KEMET	C_Rect_Kemet_L7.2mm_W2.5mm_P5mm	C4, C8
2	10U Panasonic	CP_Radial_D5.0mm_P2.50mm	C9, C10
4	100N TDK	C_Disc_D5.0mm_W2.5mm_P2.50mm	C11, C12, C13, C14
2	300K YAGEO	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R1, R21
6	100K YAGEO	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R2, R7, R20, R22, R27, R40
2	4M7 YAGEO	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R3, R23
2	200K YAGEO	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R4, R24

Show 10 more

Qty	Part	Footprint	Refs
2	11K YAGEO	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R5, R25
6	10K YAGEO	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R6, R9, R12, R26, R29, R32
2	2K2 YAGEO	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R8, R28
4	220R YAGEO	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R10, R30, R41, R43
2	68K YAGEO	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R11, R31
2	470R YAGEO	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R13, R33
6	36K YAGEO	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R14, R15, R19, R34, R35, R39
2	51R YAGEO	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R16, R36
4	220K YAGEO	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R17, R18, R37, R38
2	1K YAGEO	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R42, R44

Eurorack Dual LFO

Built around

Parts list

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