4 layers94 × 72.4 mm Dac, the printed circuit board in 3D

Dac

misc electronic projects

Size: 94 × 72.4 mm
Copper layers: 4
Thickness: 1.6 mm
Parts: 89
Nets: 53
Pads: 287
Tracks, vias: 422, 86
Pours: 2
Routed: Yes
KiCad: KiCad 5 (file 20171130)
Created: 6 Oct 2020
Updated: 31 Oct 2026

Overview

Dac is an open-source printed circuit board by schenkmi, from the schenkmi/electronic-projects repository on GitHub, published under the CERN-OHL-W-2.0 licence. It is a 4-layer board of 94 × 72.4 mm with 89 parts on 53 nets, routed with 422 tracks and 86 vias.

It is built around the TLV1117-33DCY and MB4S. Its parts include 29 resistors, 23 capacitors, 17 connectors, 8 ICs and 3 diodes. It belongs with the audio and music boards and the PIC boards of this library.

Main components

README

README.md

electronic-projects

misc electronic projects

History

2026.09.19

pre-amp-ECC86/kicad/psu-v6

Large PCB PSU for ECC86 with high side switch. Support LT3080 and LM317. Fix Drain/Source.

2026.09.02

pre-amp-ECC86/kicad/psu-v5

Large PCB PSU for ECC86 with high side switch. Support LT3080 and LM317

2026.08.26

pre-amp-ECC86/kicad/psu-v4

Large PCB PSU for ECC86 without relais. Support LT3080 and LM317

2026.08.23

input-sel-attenuator/software/v9

Power up timer to 64ms wait till voltage is stabilized

2026.08.10

pre-amp-ECC86/kicad/psu-v3

Large PCB PSU for ECC86

2026.08.01

pre-amp-ECC86/kicad/psu-v2

Shrinked and optimized PSU for ECC86

2026.07.22

pre-amp-ECC86/kicad/psu-v1

First version of PSU for ECC86

2026.07.12

pre-amp-ECC86/kicad/v1

First version of ECC86 based pre-amplifier

spdif-recv-ak4118-ak4137/software/spdif-recv-ak4118-ak4137-v4.X

Updated software for V4 PCB

2026.06.05

dac-pcm1702-v1/kicad-psu-v8/

DC/DC for +5V digital path

dac-pcm1702-v1/kicad-asrc-v14

PCB LED fix External LED support

spdif-recv-ak4118-ak4137/kicad/v4

External LED support Change one LDO to TLV1117-3.3 due to power dissipation

2026.05.28

dac-pcm1702-v1/kicad-asrc-v13

PCB re-design with fixed LED ordering

2026.05.27

pre-amp-26A7/ltspice/v2/

New CCS simulation with smaller FETs

2026.05.26

dac-pcm1702-v1/software/spdif-recv-asrc-4392-v12.X

New software for SPDIF ASRC receiver including UART and IR

2026.05.16

dac-pcm1702-v1/kicad-asrc-v12

PSU re-design, UART for debugging, I2C debugging, IR

spdif-recv-ak4118-ak4137/kicad/v3

Add IR support

2026.05.10

spdif-recv-cs8416-ak4137/kicad/v7

Improved power supply, I2S debug, Serial console

spdif-recv-ak4118-ak4137/kicad/v2

Small redesign

2026.04.25

spdif-recv-ak4118-ak4137/kicad/v1

Finalize and ordered

pre-amp-26A7/kicad/v2

Finalize and ordered

2026.03.29

pre-amp-26A7/kicad/v1

Finalize and ordered v1

2026.03.28

lv-psu-dcdc/kicad/fixed-v3

Better thermal management for DC/DC

lv-lownoise-psu/kicad/v7-dcdc-large-cap

Better thermal handling on DC/DC

input-sel-attenuator/kicad/v9-10k-47k

Changed footprint for L1 and C1

2026.03.11

lv-psu-dcdc/kicad/fixed-v2

Eval board with different inductors

hv-psu-discrete/kicad/maida-lt3080-v5

HV PSU with DC/DC for +5V output

2026.03.05

lv-lownoise-psu/kicad/v6-dcdc-large-cap

Finalize v6 with large reservoir cap

2026.02.25

hv-psu-discrete/kicad/maida-lt3080-v5-26A7GT

HV PSU for 26A7 pre-amp

2026.01.13

input-sel-attenuator/software/ir-debug-v3

Update MCC generated code

dac-pcm1792a/software/asrc-pcm1792a-v4.X

Update MCC generated code

dac-pcm1702-v1/software/v8

Update MCC generated code

spdif-recv-cs8416-ak4137/software/spdif-recv-cs8416-ak4137-v5.X

Update MCC generated code

input-sel-attenuator/software/v9

Update MCC generated code

rpi-hat-spdif/kicad/V9

RPI HAT SPDIF Output increase hole diameter to 3.2mm

rpi-hat-spdif/kicad/V9-min

RPI HAT SPDIF Output minized PCB increase hole diameter to 3.2mm

2026.01.01

adapter/spdif/kicad/v2

LVDS SPDIF XMIT with rotated connector

adapter/spdif/kicad/v2b

LVDS SPDIF XMIT with standard connector

rpi-hat-spdif/kicad/V7-min

RPI HAT SPDIF Output minized PCB

rpi-hat-spdif/kicad/V8

RPI HAT SPDIF Output new PCB

2025.12.20

adapter/spdif/kicad/v1

Finalize v1 LVDS SPDIF XMIT

rpi-hat-spdif/kicad/v6

RPI HAT SPDIF Output

rpi-hat-spdif/kicad/v6-min

RPI HAT SPDIF Output minimized

2025.12.08

pre-amp-ECC88/kicad/v9

Finalize and ordered v9

2025.09.29

retro/c64-user-port-led

Finalize v1 of C64 user port LED

2025.09.28

dac-pcm1704/kicad/dac-df1706-pcm1704-v2

Finalize and ordered v2

2025.09.21

dac-pcm1704/kicad/dac-pcm1704-v5

Finalize and ordered v5

dac-pcm1702-v1/kicad-i2s-nos-v7

Finalize and ordered v7

dac-pcm1792a/kicad/v6/

Finalize and ordered v6

2025.09.13

input-sel-attenuator/software/ir-debug-v2

input-sel-attenuator/software/v8

V2.5 2025.09.12 Shiny new push button and saving handling Use volume when doing channel switch.

2025.09.07

lv-lownoise-psu/kicad/v5-dcdc

Finalize and ordered v5

lv-lownoise-psu/kicad/v5-dcdc-large-cap

Finalize and ordered v5 with large reservoir cap

2025.08.25

lt1115-phono-mm-mc/kicad/v6

Finalize and ordered v6

2025.08.23

dac-pcm1702-v1/kicad-psu-v7

Finalize and ordered v7

Category and platform

Audio and music PIC

Topics

amplifier audio diy electronics hifi kicad microchip-pic tube

Project files

Show this board on your page

https://pcbkit.io/boards/schenkmi/electronic-projects/dac-pcm1702-v1/kicad-asrc/dac.kicad_pcb

The board's own page, for a message or a post.

Source

Repository: schenkmi/electronic-projects
Board file: dac-pcm1702-v1/kicad-asrc/dac.kicad_pcb
Commit: 8d54cdf
Licence: CERN-OHL-W-2.0
Copies: 4 copies in 1 repository

Parts

Qty	Value	Footprint	References
18	33R	Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R1, R4, R5, R11, R14, R15, R16, R17, R18, R21, R24, R25, R26, R27, R28, R29 +2
9	100nF	Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C1, C2, C3, C4, C5, C13, C14, C15, C16
5	10uF	Capacitor_Tantalum_SMD:CP_EIA-3528-21_Kemet-B_Pad1.50x2.35mm_HandSolder	C10, C11, C12, C23, C24
4	4K99	Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R7, R8, R22, R23
4	MountingHole	MountingHole:MountingHole_3.2mm_M3	H1, H2, H3, H4
3	100nF	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C17, C21, C22
3	330nF	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C7, C19, C20
3	GND	Connector_Pin:Pin_D1.0mm_L10.0mm	J3, J5, J17
2	0R	Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R19, R20
2	330R	Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R2, R3
2	AC	Connector_Pin:Pin_D1.0mm_L10.0mm	J8, J9
2	LED	LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder	D1, D2
2	PLR135-T10	kicad-snk:PLR135-T10_PLT133-T10W	U1, U2
1	+5VIN	Connector_Pin:Pin_D1.0mm_L10.0mm	J16
1	+5VOUT	Connector_Pin:Pin_D1.0mm_L10.0mm	J4
1	1.8V	TestPoint:TestPoint_Pad_D1.0mm	TP7
1	1000uF	Capacitor_THT:CP_Radial_D12.5mm_P5.00mm	C6
1	100uF	Capacitor_THT:CP_Radial_D8.0mm_P3.50mm	C18
1	10nF	Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C8
1	1k	Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R12
1	3.3V	TestPoint:TestPoint_Pad_D1.0mm	TP6
1	330R	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R10
1	4k99	Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R13
1	A	kicad-snk:TE_CONN_RCPT_10POS_0.1_TIN_PCB	J15
1	ASDMB-xxxMHz	Oscillator:Oscillator_SMD_EuroQuartz_XO91-4Pin_7.0x5.0mm_HandSoldering	U8
1	B	kicad-snk:TE_CONN_RCPT_10POS_0.1_TIN_PCB	J10
1	CLK	Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical	J13
1	Conn_01x06_Male	Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical	J1
1	I2C	Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical	J7
1	IN	Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical	J11
1	IN	kicad-snk:TE_CONN_RCPT_10POS_0.1_TIN_PCB	J6
1	LED	Connector_Pin:Pin_D1.0mm_L10.0mm	J2
1	MB4S	Package_TO_SOT_SMD:TO-269AA	D3
1	PIC16F1829-IP	Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm	U5
1	PORTA	Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical	J14
1	PORTB	Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical	J12
1	RESET	TestPoint:TestPoint_Pad_D1.0mm	TP4
1	RX1+	TestPoint:TestPoint_Pad_D1.0mm	TP3
1	RX2+	TestPoint:TestPoint_Pad_D1.0mm	TP1
1	SRC4392	Package_QFP:TQFP-48_7x7mm_P0.5mm	U3
1	TLV1117-18	Package_TO_SOT_SMD:SOT-223-3_TabPin2	U11
1	TLV1117-33	Package_TO_SOT_SMD:SOT-223-3_TabPin2	U10
1	TLV1117-50	Package_TO_SOT_SMD:SOT-223-3_TabPin2	U9

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Questions

How big is the Dac PCB?

It measures 94 × 72.4 mm and has 4 copper layers, 1.6 mm thick.

What parts does the Dac use?

89 parts, built around the TLV1117-33DCY and MB4S. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Dac KiCad files?

From the schenkmi/electronic-projects repository on GitHub, at the commit this page was made from: the board is dac-pcm1702-v1/kicad-asrc/dac.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the Dac design in my own project?

Its repository publishes it under the CERN-OHL-W-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).