2 layers100 × 100 mm UniBikes, the printed circuit board in 3D

UniBikes

An PCB showing bike sharing stations at TU Dortmund University.

Size: 100 × 100 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 29
Nets: 34
Pads: 128
Tracks, vias: 348, 19
Pours: 1
Routed: Yes
KiCad: KiCad 8.0 (file 20240108)
Created: 10 Nov 2024
Updated: 25 Dec 2024

Overview

UniBikes is an open-source printed circuit board by strifel, from the strifel/UniBikes repository on GitHub. It is a 2-layer board of 100 × 100 mm with 29 parts on 34 nets, routed with 348 tracks and 19 vias.

It is built around the ESP32-C3, TLV1117-33DCY and WS2812B. Its parts include 10 diodes, 6 resistors, 4 capacitors, 4 connectors and 3 switches. It belongs with the ESP32 and RISC-V boards of this library.

Main components

README

README.md

UniBikes

Inspired by traintrackr I wanted to create something similar for visualizing bikesharing bikes as my first ever PCB design.

An image of the finished PCB

Unibikes shows the 10 bike sharing locations at TU Dortmund University in germany with an RGB LED each. Each LED can therefore represent if there are none, some or a few bikes at that station.

Data

The micropython code directly receives the rgb values for each LED from a backend.

Components

Component name	Component
D1 to D10	WS2812B LED
J0	USB C Receptable
J1 and J2	4 Pin header
J3	2 Pin header
U1	ESP32 C3
U2	TLV1117 3.3V
SW1 to SW3	Push button
R1	1k Resistor
R2 to R4	10k Resistor
R5 and R6	5.1k Resistor
C1 and C4	10uF Capacitor
C2	1 uF Capacitor
C3	100nF Capacitor

Parts

Qty	Value	Footprint	References
10	WS2812B	LED_SMD:LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm	D1, D2, D3, D4, D5, D6, D7, D8, D9, D10
3	10k	Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R2, R3, R4
3	SW_Push	Button_Switch_SMD:SW_Push_SPST_NO_Alps_SKRK	SW1, SW2, SW3
2	10 uF	Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C1, C4
2	5.1k	Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R5, R6
2	Conn_01x04_Pin	Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical_SMD_Pin1Left	J1, J2
1	1 uF	Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C2
1	100nF	Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C3
1	1k	Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R1
1	Conn_01x02_Pin	Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical_SMD_Pin1Left	J3
1	ESP32-C3	RF_Module:ESP32-C3-WROOM-02	U1
1	TLV1117-33	Package_TO_SOT_SMD:SOT-223-3_TabPin2	U2
1	USB_C_Receptacle_USB2.0	Connector_USB:USB_C_Receptacle_GCT_USB4110	J0

Questions

How big is the UniBikes PCB?

It measures 100 × 100 mm and has 2 copper layers, 1.6 mm thick.

What parts does the UniBikes use?

29 parts, built around the ESP32-C3, TLV1117-33DCY and WS2812B. 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 UniBikes KiCad files?

From the strifel/UniBikes repository on GitHub, at the commit this page was made from: the board is UniBikes.kicad_pcb and its schematic UniBikes.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the UniBikes design in my own project?

Its repository states no licence, so its author keeps all rights: ask strifel before reusing the design.

Category and platform

ESP32 RISC-V

Topics

bike-sharing kicad-pcb micropython micropython-esp32 pcb

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/strifel-unibikes" title="UniBikes in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/strifel-unibikes.jpg" alt="UniBikes" width="1200" height="900">

A picture that opens the board, for a README

[![UniBikes](https://pcbkit.io/embed/boards/strifel-unibikes.jpg?size=s)](https://pcbkit.io/boards/strifel-unibikes)

Source

Repository: strifel/UniBikes
Board file: UniBikes.kicad_pcb
Commit: 7204f17
Licence: Not stated

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