2 layers389 × 136.2 mm
2 layers100.3 × 60.3 mm
Input sel
schenkmi/electronic-projects6misc electronic projects
- Size
- 100.3 × 60.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 59
- Nets
- 44
- Pads
- 166
- Tracks, vias
- 204, 37
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 6 Oct 2020
- Updated
- 31 Oct 2026
Overview
Input sel 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 2-layer board of 100.3 × 60.3 mm with 59 parts on 44 nets, routed with 204 tracks and 37 vias.
It is built around the PIC16F18446-I/SO, L7805 and ULN2003A, with the 1N4148W and MB4S among its other parts. Its parts include 30 connectors, 7 capacitors, 7 resistors, 5 switches and 4 ICs. It belongs with the audio and music boards and the PIC boards of this library.
Main components
5
PIC16F18446-I/SO
SOIC-20-300mil-40℃~+125℃ 12bit 18 2.3V~5.5V 256Byte 28KB 2KB 32MHz 5bit 8 Bit Built-in FLASH PIC SOIC-20-300mil Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
L7805
TO-220ST0℃~+125℃@(Tj) 1 1.2A 20V 2V@(1A) 42uV 500uA 5V 73dB@(120Hz) Fixed Positive Short Circuit Protection TO-220ST Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSOSENVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
ULN2003A
SOP-16-40℃~+85℃ 0.93mA 100uA 15pF 20uA 30V 50V Seven channels SOP-16 Darlington Transistor Arrays ROHSUMWDarlington Transistor Arrays
1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching Diodes
MB4S
MBS-55℃~+150℃@(Tj) 1.1V@1A 35A 400V 5uA@400V 800mA Single-Phase Rectifier MBS Bridge Rectifiers ROHSYONGYUTAIBridge Rectifiers
README
README.mdelectronic-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
Parts
59| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | G6K-2 | Relay_SMD:Relay_DPDT_Omron_G6K-2F | K1, K2, K3, K4, K5 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 3 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3, C5, C6 |
| 3 | 4.7k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5, R6, R7 |
| 3 | GND | Connector_Pin:Pin_D1.0mm_L10.0mm | J2, J4, J6 |
| 2 | 330R | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2 |
| 2 | 47k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R4 |
| 2 | AC | Connector_Pin:Pin_D1.0mm_L10.0mm | J7, J8 |
| 1 | +5VIN | Connector_Pin:Pin_D1.0mm_L10.0mm | J5 |
| 1 | +5VOUT | Connector_Pin:Pin_D1.0mm_L10.0mm | J3 |
| 1 | 1000uF | Capacitor_THT:CP_Radial_D12.5mm_P5.00mm | C1 |
| 1 | 10nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C7 |
| 1 | 10uF | Capacitor_Tantalum_SMD:CP_EIA-3528-21_Kemet-B_Pad1.50x2.35mm_HandSolder | C4 |
| 1 | 1N4148W | Diode_SMD:D_SOD-123 | D2 |
| 1 | 330nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2 |
| 1 | Conn_01x06_Male | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J10 |
| 1 | IN_GNDL1 | Connector_Pin:Pin_D1.0mm_L10.0mm | J21 |
| 1 | IN_GNDL2 | Connector_Pin:Pin_D1.0mm_L10.0mm | J25 |
| 1 | IN_GNDL3 | Connector_Pin:Pin_D1.0mm_L10.0mm | J29 |
| 1 | IN_GNDL4 | Connector_Pin:Pin_D1.0mm_L10.0mm | J33 |
| 1 | IN_GNDR1 | Connector_Pin:Pin_D1.0mm_L10.0mm | J19 |
| 1 | IN_GNDR2 | Connector_Pin:Pin_D1.0mm_L10.0mm | J23 |
| 1 | IN_GNDR3 | Connector_Pin:Pin_D1.0mm_L10.0mm | J27 |
| 1 | IN_GNDR4 | Connector_Pin:Pin_D1.0mm_L10.0mm | J31 |
| 1 | IN_L1 | Connector_Pin:Pin_D1.0mm_L10.0mm | J20 |
| 1 | IN_L2 | Connector_Pin:Pin_D1.0mm_L10.0mm | J24 |
| 1 | IN_L3 | Connector_Pin:Pin_D1.0mm_L10.0mm | J28 |
| 1 | IN_L4 | Connector_Pin:Pin_D1.0mm_L10.0mm | J32 |
| 1 | IN_R1 | Connector_Pin:Pin_D1.0mm_L10.0mm | J18 |
| 1 | IN_R2 | Connector_Pin:Pin_D1.0mm_L10.0mm | J22 |
| 1 | IN_R3 | Connector_Pin:Pin_D1.0mm_L10.0mm | J26 |
| 1 | IN_R4 | Connector_Pin:Pin_D1.0mm_L10.0mm | J30 |
| 1 | L7805 | Package_TO_SOT_THT:TO-220-3_Vertical | U2 |
| 1 | LED | Connector_Pin:Pin_D1.0mm_L10.0mm | J1 |
| 1 | MB4S | Package_TO_SOT_SMD:TO-269AA | D1 |
| 1 | OUT_GNDL | Connector_Pin:Pin_D1.0mm_L10.0mm | J17 |
| 1 | OUT_GNDR | Connector_Pin:Pin_D1.0mm_L10.0mm | J15 |
| 1 | OUT_L | Connector_Pin:Pin_D1.0mm_L10.0mm | J16 |
| 1 | OUT_R | Connector_Pin:Pin_D1.0mm_L10.0mm | J14 |
| 1 | PIC16F18446-I/SO | Package_SO:SOP-20_7.5x12.8mm_P1.27mm | U3 |
| 1 | TE_CONN_RCPT_10POS_0.1_TIN_PCB | kicad-snk:TE_CONN_RCPT_10POS_0.1_TIN_PCB | J9 |
| 1 | TLV1117-50 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U1 |
| 1 | ULN2003A | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U4 |
Questions
How big is the Input sel PCB?
It measures 100.3 × 60.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Input sel use?
59 parts, built around the PIC16F18446-I/SO, L7805, ULN2003A and 1N4148W. 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 Input sel KiCad files?
From the schenkmi/electronic-projects repository on GitHub, at the commit this page was made from: the board is input-sel/kicad/v2b/input-sel.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Input sel 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).
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