ARP 4072 LPF plug in board

JordanAceto·VCF_plug_in_boards·arp_4072_LPF_plug_in_board/kicad_docs/arp_4072_LPF.kicad_pcb

ARP 4072 LPF plug in board layout, top view — open source board by JordanAceto

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About the ARP 4072 LPF plug in board

ARP 4072 LPF plug in board is an open source PCB design by JordanAceto, published on GitHub under the CC-BY-4.0 license. It is a 2-layer board measuring 58.4 × 50.8 mm, with 80 components from 55 distinct parts.

Other key parts include the LM13700 and TL072. By type, the board carries 44 resistors, 15 capacitors, 10 transistors, 4 connectors, 3 ICs and 1 diode.

It belongs with the audio designs in this gallery.

From the project

Various small synthesizer Voltage Controlled Filter pcbs

Small ARP 4072 based low pass filter PCB, designed to plug into a larger motherboard.

ARP 4072 based LPF with Q compensation. This PCB includes the audio path and CV inputs for frequency and feedback, but does not include any modulation sources.

The intended use for this board is to plug in to a larger motherboard which contains slots for one or more of these plug-in boards, as well as modulation sources, panel controls, and input/output routing.

ARP 4072 LPF plug in board, from the project README — From the project README

Main components on the ARP 4072 LPF plug in board

ARP 4072 LPF plug in board bill of materials (BOM)

80 components, 55 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	LM13700 LM3900	SOIC-14_3.9x8.7mm_P1.27mm	U1
2	TL072	SOIC-8_3.9x4.9mm_P1.27mm	U2, U3
2	MMBT3906 BCM857DS	SOT457	Q1, Q2
4	BCM857DS	SOT457	Q3, Q4, Q5, Q6
1	BCM847DS135	SOT457	Q7
2	MMBT3904	SOT-23_Handsoldering	Q8, Q9
1	MMBT3906	SOT-23_Handsoldering	Q10
1	signal_in	PinHeader_1x04_P2.54mm_Vertical	J1
1	CV_in	PinHeader_1x04_P2.54mm_Vertical	J2
1	signal_out	PinHeader_1x04_P2.54mm_Vertical	J3
1	feedback_CV_and_power	PinHeader_1x08_P2.54mm_Vertical	J4
1	10k	Potentiometer_Bourns_3296W_Vertical	RV1
1	100k	Potentiometer_Bourns_3296W_Vertical	RV2
1	50k	Potentiometer_Bourns_3296W_Vertical	RV3
1	1N4148W MMSZ5225B	D_SOD-123	D1
2	100nF	C_0805_2012Metric_Pad1.15x1.40mm_HandSolder	C1, C7
2	470pF	C_0805_2012Metric_Pad1.15x1.40mm_HandSolder	C2, C5
1	470N 470pF	C_0805_2012Metric_Pad1.15x1.40mm_HandSolder	C3
1	100P 470pF	C_0805_2012Metric_Pad1.15x1.40mm_HandSolder	C4
1	10uF	CP_Radial_D6.3mm_P2.50mm	C6

Show 35 more

Qty	Part	Footprint	Refs
1	4N7 100pF	C_0805_2012Metric_Pad1.15x1.40mm_HandSolder	C8
2	10U 10uF	C_0805_2012Metric_Pad1.15x1.40mm_HandSolder	C9, C10
5	100N 100nF	C_0805_2012Metric_Pad1.15x1.40mm_HandSolder	C11, C12, C13, C14, C15
2	10K 10k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R1, R13
1	220 100k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R2
5	10K 220	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R3, R6, R7, R11, R24
1	220 10k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R4
1	10K 33k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R5
1	10K 68k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R8
1	220 1k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R9
2	1K8 10k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R10, R26
1	220	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R12
1	10K 100k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R14
1	150K 1k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R15
1	15K 2k2	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R16
3	4K7 10k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R17, R23, R28
1	270 220	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R18
1	15K 10k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R19
1	270K 220	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R20
1	270 10k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R21
1	51K 1k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R22
1	150K 220	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R25
1	470K 1k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R27
3	220	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R29, R38, R41
1	10k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R30
1	82k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R31
1	120k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R32
1	20k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R33
1	100k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R34
2	220k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R35, R36
1	39k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R37
2	47k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R39, R40
1	33k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R42
1	680k	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R43
1	7k5	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R44

ARP 4072 LPF plug in board design files

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

ARP 4072 LPF plug in board: common questions

How big is the ARP 4072 LPF plug in board?

The ARP 4072 LPF plug in board measures 58.4 × 50.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ARP 4072 LPF plug in board?

80 components, from 55 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the ARP 4072 LPF plug in board design files?

From the JordanAceto/VCF_plug_in_boards repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the ARP 4072 LPF plug in board design in my own project?

Yes, under the terms of its CC-BY-4.0 license, which JordanAceto chose for the repository.

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