DMH Output PCB Main

DeMarco·DMH-Output·DMH_Output_PCB_Main/DMH_Output_PCB_Main.kicad_pcb

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

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About the DMH Output PCB Main

DMH Output PCB Main is an open source PCB design by DeMarco, published on GitHub under the CC0-1.0 license. It is a 2-layer board measuring 49 × 175 mm, with 91 components from 23 distinct parts.

Other key parts include the TL072, TL074 and NE5532. By type, the board carries 32 resistors, 22 capacitors, 21 connectors, 10 diodes and 6 ICs.

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 Main, from the project README — From the project README

Main components on the DMH Output PCB Main

TL072 TL074 NE5532

DMH Output PCB Main bill of materials (BOM)

91 components, 23 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
2	TL072	DIP-8_W7.62mm_Socket	U1, U20
2	TL074	DIP-14_W7.62mm_Socket	U8, U11
2	NE5532	DIP-8_W7.62mm_Socket	U13, U15
9	TRS_JACK_6.35MM_SW TRS_Jack_6.35mm_Sw	CUI_SJ-63083D	J1, J2, J3, J4, J5, J6, J7, J8 +1
2	CONN_01X06 Conn_01x06	PinSocket_1x06_P2.54mm_Vertical	J23, J28
2	CONN_01X02 Conn_01x02	PinHeader_1x02_P2.54mm_Vertical	J24, J25
3	CONN_01X06_PINHEADER Conn_01x06_PinHeader	PinSocket_1x06_P2.54mm_Vertical	J26, J27, J31
1	CONN_01X04_PINHEADER Conn_01x04_PinHeader	PinSocket_1x04_P2.54mm_Vertical	J29
2	CONN_01X02_PINHEADER Conn_01x02_PinHeader	PinSocket_1x02_P2.54mm_Vertical	J35, J36
1	IDC_02X05 IDC_02x05	IDC-Header_2x05_P2.54mm_Vertical_Eurorack	J100
1	IDC_02X05 IDC_02x05	IDC-Header_2x05_P2.54mm_Vertical_BackBone	J200
2	SB140	D_DO-41_SOD81_P10.16mm_Horizontal	D1, D2
8	1N4148	D_DO-35_SOD27_P7.62mm_Horizontal	D3, D4, D5, D6, D33, D34, D43, D44
2	47UF 47uF	CP_Radial_D5.0mm_P2.00mm	C1, C2
4	10UF 10uF	CP_Radial_D5.0mm_P2.00mm	C5, C6, C23, C24
4	100PF 100pF	C_Disc_D3.0mm_W2.0mm_P2.50mm	C11, C12, C13, C14
12	100NF 100nF	C_Disc_D4.3mm_W1.9mm_P5.00mm	C47, C48, C50, C52, C54, C56, C57, C59 +4
8	22K 22k	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R1, R2, R5, R8, R84, R89, R92, R97
4	470R	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R3, R6, R86, R94
10	1k	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R30, R31, R32, R33, R44, R46, R48, R49 +2

Show 3 more

Qty	Part	Footprint	Refs
2	10K 10k	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R45, R47
4	10R	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R52, R53, R58, R59
4	68K	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R80, R81, R87, R95

DMH Output PCB Main 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 Main: common questions

How big is the DMH Output PCB Main?

The DMH Output PCB Main measures 49 × 175 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the DMH Output PCB Main?

91 components, from 23 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 Main 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 Main 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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