2 layers123.4 × 109.1 mm
2 layers123.4 × 109.1 mm
Hardware trrrs
dennisdebel/plan-b1- Size
- 123.4 × 109.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 87
- Nets
- 192
- Pads
- 507
- Tracks, vias
- 1,395, 170
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 30 May 2024
- Updated
- 26 Aug 2025
Overview
Hardware trrrs is an open-source printed circuit board by dennisdebel, from the dennisdebel/plan-b repository on GitHub. It is a 2-layer board of 123.4 × 109.1 mm with 87 parts on 192 nets, routed with 1,395 tracks and 170 vias.
It is built around the WEMOS D1 MINI, ULN2003A and CD4051BE. Its parts include 19 resistors, 19 ICs, 16 capacitors, 16 switches and 1 connector. It belongs with the ESP8266 boards of this library.
Main components
3
WEMOS D1 MINI
A mini wifi board with 4MB flash based on ESP-8266EX, hardware version 4.0.0.LolinUncategorised
ULN2003A
SOP-16-40℃~+85℃ 0.93mA 100uA 15pF 20uA 30V 50V Seven channels SOP-16 Darlington Transistor Arrays ROHSUMWDarlington Transistor Arrays
CD4051BE
PDIP-16-55℃~+125℃ 125Ω 20MHz 3V~20V 450ns 8 8:1 PDIP-16 Analog Switches, Multiplexers ROHSTexas InstrumentsAnalog Switches, Multiplexers
README
README.mdWemos Midi Roll Project
Parts
87| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | 10K | Resistor_SMD:R_0805_2012Metric | R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19 |
| 16 | 10pF | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C16 |
| 16 | SW_Push_SPDT | MS0850502F030P1A:SW_MS0850502F030P1A-fixed | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9, SW10, SW11, SW12, SW13, SW14, SW15, SW16 |
| 16 | Stepper_Motor_unipolar_5pin | Connector_Audio:AUDIO-SMD_STX-3542-5N-G-TR | M1, M2, M3, M4, M5, M6, M7, M8, M9, M10, M11, M12, M13, M14, M15, M16 |
| 16 | ULN2003A | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U4, U5, U6, U7, U8, U9, U10, U11, U12, U13, U14, U15, U16, U17, U18, U19 |
| 3 | 1K | Resistor_SMD:R_0805_2012Metric | R1, R2, R3 |
| 2 | CD4051B | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U2, U3 |
| 1 | Barrel_Jack | Connector_BarrelJack:BarrelJack_CUI_PJ-063AH_Horizontal | J2 |
| 1 | WeMos_D1_mini | Module:WEMOS_D1_mini_light | U1 |
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Questions
How big is the Hardware trrrs PCB?
It measures 123.4 × 109.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Hardware trrrs use?
87 parts, built around the WEMOS D1 MINI, ULN2003A and CD4051BE. 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 Hardware trrrs KiCad files?
From the dennisdebel/plan-b repository on GitHub, at the commit this page was made from: the board is hardware/hardware-trrrs/hardware.kicad_pcb and its schematic hardware/hardware-jst/hardware.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Hardware trrrs design in my own project?
Its repository states no licence, so its author keeps all rights: ask dennisdebel before reusing the design.