Diode ladder filter

gridbugs·modular2·diode-ladder-filter/diode-ladder-filter.kicad_pcb

Diode ladder filter PCB layout, top view — open source board by gridbugs

About the Diode ladder filter PCB

Diode ladder filter is an open source PCB design by gridbugs, published on GitHub under the MIT license. It is a 2-layer board measuring 64.5 × 128.8 mm, with 72 components from 32 distinct parts.

Other key parts include the TL074. By type, the board carries 23 resistors, 12 connectors, 12 diodes, 12 capacitors, 4 switches and 2 ICs.

From the project

A modular synthesizer, where modules are designed as close to bare PCBs as is practical/safe. This is the spiritual successor to the briefcase modular synthesizer.

Main components on the Diode ladder filter

Diode ladder filter bill of materials (BOM)

72 components, 32 distinct parts.

Qty	Part	Footprint	Refs
2	TL074	DIP-14_W7.62mm_Socket	U1, U2
2	Power	IDC-Header_2x03_P2.54mm_Vertical	J1, J2
2	CV1	banana-jack	J3, J8
2	CV2	banana-jack	J4, J9
2	Input	banana-jack	J5, J10
2	Output	banana-jack	J6, J11
1	Conn_01x04_Socket	PinSocket_1x04_P2.54mm_Vertical	J7
1	Conn_01x04_Pin	PinHeader_1x04_P2.54mm_Vertical	J12
1	100K - Cutoff	Potentiometer_Alps_RK09K_Single_Vertical	RV1
1	100K - CV1 Scale	Potentiometer_Alps_RK09K_Single_Vertical	RV2
1	100K - Resonance	Potentiometer_Alps_RK09K_Single_Vertical	RV3
1	100K - CV2 Scale	Potentiometer_Alps_RK09K_Single_Vertical	RV4
1	100K - Envelope Soften	Potentiometer_Alps_RK09K_Single_Vertical	RV5
1	100K - Input Scale	Potentiometer_Alps_RK09K_Single_Vertical	RV6
1	100K - Output Scale	Potentiometer_Alps_RK09K_Single_Vertical	RV7
1	Resonance_safety	switch1	SW1
1	LPF	switch1	SW2
1	HPF	switch1	SW3
1	BPF	switch1	SW4
12	D	D_A-405_P7.62mm_Horizontal	D1, D2, D3, D4, D5, D6, D7, D8 +4

Show 12 more

Qty	Part	Footprint	Refs
5	1nF	C_Disc_D4.3mm_W1.9mm_P5.00mm	C1, C2, C6, C7, C8
4	100nF	C_Disc_D4.3mm_W1.9mm_P5.00mm	C3, C4, C9, C11
1	10uF	C_Disc_D4.3mm_W1.9mm_P5.00mm	C5
2	1uF	C_Disc_D4.3mm_W1.9mm_P5.00mm	C10, C12
1	24K	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R1
1	47K	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R2
3	10K	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R3, R4, R8
5	1k	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R5, R7, R14, R19, R21
1	3k3	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R6
8	33K	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R9, R10, R12, R15, R16, R17, R18, R23
2	2K	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R11, R13
2	220K	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R20, R22

Diode ladder filter design files

The KiCad project lives in the gridbugs/modular2 repository on GitHub; these links point at the commit this page was built from.

Diode ladder filter: common questions

How big is the Diode ladder filter PCB?

The Diode ladder filter measures 64.5 × 128.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Diode ladder filter?

72 components, from 32 distinct parts. The full bill of materials is listed on this page.

Where can I download the Diode ladder filter design files?

From the gridbugs/modular2 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Diode ladder filter design in my own project?

Yes, under the terms of its MIT license, which gridbugs chose for the repository.

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