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Bike-Mini speedo

InfinityTech100·Bike-Mini-speedo·Hardware/Bike/Bike.kicad_pcb

Bike-Mini speedo PCB layout, top view — open source ESP32 board by InfinityTech100
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About the Bike-Mini speedo PCB

Bike-Mini speedo is an open source ESP32 PCB design by InfinityTech100, published on GitHub. It is a 4-layer board measuring 54 × 35 mm, with 67 components from 35 distinct parts.

Its main chip is the ESP32-WROOM-32, from the ESP32 family. Other key parts include the APTD3216SECK, AP2112K-3.3, MCP73831-2-OT, CP2104 and SN74HC164DR. By type, the board carries 30 resistors, 13 ICs, 11 capacitors, 5 connectors, 3 transistors and 2 LEDs.

Main components on the Bike-Mini speedo

APTD3216SECKAP2112K-3.3MCP73831-2-OTCP2104SN74HC164DRESP32-WROOM-32GT-USB-7010ASVUSBLC6-2P6

Bike-Mini speedo bill of materials (BOM)

67 components, 35 distinct parts — part numbers from the project's BOM.

QtyPartRefs
6
APTD3216SECK
U1, U7, U8, U9, U10, U11
1
AP2112K-3.3
U2
1
MCP73831-2-OT
U3
1
CP2104
U4
1
SN74HC164DR
U5
1
ESP32-WROOM-32
U6
1
GT-USB-7010ASV
U12
1
USBLC6-2P6
U13
1
DMG3415U
Q1
1
Q_NPN_BEC
Q2
1
LMUN5214DW1T1G
Q8
1
BAT
J1
1
SW1
J3
1
BUZ
J4
1
GPS
J5
1
ON
J7
1
RST
SW1
1
SLS0392FW2A1GD
LED2
1
19-037A/RSGHBHW1-S03/2T
LED3
1
MBR120
D1
Show 15 more
QtyPartRefs
1
3V3
D3
4
10UF
10uF
C1, C2, C4, C5
2
1UF
1uF
C3, C6
2
1u
C7, C9
2
100N
100n
C8, C10
1
100n
C11
5
100K
R1, R2, R6, R7, R8
2
1K
R3, R18
1
4.7K
R4
2
10K
10k
R5, R13
2
5K1
R9, R35
1
4K7
R10
13
330
R14, R20, R21, R22, R23, R24, R25, R28 +5
1
150
R15
3
100
R16, R17, R19

Bike-Mini speedo design files

The KiCad project lives in the InfinityTech100/Bike-Mini-speedo repository on GitHub; these links point at the commit this page was built from.

Bike-Mini speedo: common questions

What microcontroller does the Bike-Mini speedo use?

The Bike-Mini speedo is built around the ESP32-WROOM-32, from the ESP32 family.

How big is the Bike-Mini speedo PCB?

The Bike-Mini speedo measures 54 × 35 mm, has 4 copper layers and is 1.6458 mm thick.

How many components are on the Bike-Mini speedo?

67 components, from 35 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 Bike-Mini speedo design files?

From the InfinityTech100/Bike-Mini-speedo 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 Bike-Mini speedo design in my own project?

The repository has no license, so all rights stay with InfinityTech100. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Bike-Mini speedo without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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