DMH Output PCB Controls

DeMarco·DMH-Output·DMH_Output_PCB_Controls/DMH_Output_PCB_Controls.kicad_pcb

DMH Output PCB Controls layout, top view — open source board by DeMarco

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About the DMH Output PCB Controls

DMH Output PCB Controls is an open source PCB design by DeMarco, published on GitHub under the CC0-1.0 license. It is a 2-layer board measuring 48 × 121 mm, with 85 components from 29 distinct parts.

Other key parts include the LM339 and LM4040LP-10. By type, the board carries 26 diodes, 26 resistors, 14 capacitors, 8 ICs, 6 connectors and 2 transistors.

It belongs with the audio designs in this gallery.

From the project

Kosmo format output module

The L and R inputs accept the usual (Eurorack) modular synth audio amplitude of 10 V peak-to-peak. The line level L and R outputs accept both balanced TRS and unbalanced TS cables. The main volume control affects both L and R channels. The reduction factor can be set from from -infinite (silence) to -3 dB (max). Since the usual 10 Vpp amplitude corresponds to around +13 dBu, this means the module can output from -infinite up to +10 dBu. The precision dBu meter will max out at +6 dBu (red LED). Most professional audio equipment like mixers and audio interfaces expect a nominal input line level…

DMH Output PCB Controls, from the project README — From the project README

Main components on the DMH Output PCB Controls

LM339 LM4040LP-10

DMH Output PCB Controls bill of materials (BOM)

85 components, 29 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
7	LM339	DIP-14_W7.62mm_Socket	U2, U3, U4, U5, U6, U24, U25
1	LM4040LP-10	TO-92L_Inline_Wide	U21
2	BC558	TO-92L_Inline_Wide	Q1, Q2
2	CONN_01X06 Conn_01x06	PinSocket_1x06_P2.54mm_Vertical	J10, J13
2	CONN_01X06_PINHEADER Conn_01x06_PinHeader	PinSocket_1x06_P2.54mm_Vertical	J11, J12
2	CONN_01X02 Conn_01x02	PinSocket_1x02_P2.54mm_Vertical	J21, J22
3	B10K B10k	Potentiometer_Alpha_RD902F-40-00D_Dual_Vertical	RV1, RV2, RV3
14	LED_G	LED_Rectangular_W5.0mm_H2.0mm	D7, D8, D9, D10, D11, D12, D13, D20 +6
4	LED_Y	LED_Rectangular_W5.0mm_H2.0mm	D14, D15, D18, D19
2	LED_R	LED_Rectangular_W5.0mm_H2.0mm	D16, D17
4	1N4148	D_DO-35_SOD27_P7.62mm_Horizontal	D27, D28, D29, D30
2	LED_Dual_AKA	LED_Rectangular_W5.0mm_H2.0mm-3Pins	D31, D32
14	100NF 100nF	C_Disc_D4.3mm_W1.9mm_P5.00mm	C41, C42, C43, C44, C58, C60, C65, C66 +6
6	3K3 3k3	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R4, R12, R88, R90, R109, R110
1	82K 82k	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R9
1	6K8 6k8	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R10
1	4K7 4k7	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R11
1	2K37 2k37	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R13
1	1K69 1k69	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R14
1	1K2 1k2	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R15

Show 9 more

Qty	Part	Footprint	Refs
1	1K43 1k43	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R16
1	715R	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R17
2	361R	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R18, R19
2	22K 22k	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R20, R24
2	47R	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R21, R23
2	100K 100k	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R85, R91
2	47K 47k	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R99, R105
1	10K 10k	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R102
1	1k	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R108

DMH Output PCB Controls design files

The KiCad project lives in the DeMarco/DMH-Output repository on GitHub; these links point at the commit this page was built from.

DMH Output PCB Controls: common questions

How big is the DMH Output PCB Controls?

The DMH Output PCB Controls measures 48 × 121 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the DMH Output PCB Controls?

85 components, from 29 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 DMH Output PCB Controls design files?

From the DeMarco/DMH-Output repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the DMH Output PCB Controls design in my own project?

Yes, under the terms of its CC0-1.0 license, which DeMarco chose for the repository.

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