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Ir spoke link

niklasdathe·IRBicycleWheelSpeedSensor·hardware/ir_spoke_link/ir_spoke_link.kicad_pcb

Ir spoke link PCB layout, top view — open source board by niklasdathe

About the Ir spoke link PCB

Ir spoke link is an open source PCB design by niklasdathe, published on GitHub. It is a 2-layer board measuring 21 × 37.9 mm, with 26 components from 22 distinct parts.

Other key parts include the TLV9062IDDFR and TLV7011DCKR. By type, the board carries 11 resistors, 6 capacitors, 4 connectors, 2 ICs, 2 diodes and 1 transistor.

It belongs with the sensors and iot & wireless designs in this gallery.

From the project

Configurable 940 nm IR spoke sensor with KiCad 10 hardware, linked Python/ngspice simulation, ESP-IDF RMT firmware, and JLCPCB exports.

Configurable 940 nm through-beam spoke sensor for a Seeed Studio XIAO ESP32-S3. A discrete analog front end restores a 25-50 kHz optical carrier; ESP-IDF RMT detects its interruption and learns the wheel's spoke pattern.

This repository is the wheel-speed-sensor subsystem of BicycleOBU. The online Interactive BOM is generated directly from the authoritative KiCad PCB.

Ir spoke link, from the project README
From the project README

Main components on the Ir spoke link

TLV9062IDDFRTLV7011DCKR

Ir spoke link bill of materials (BOM)

26 components, 22 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
TLV9062IDDFR
Texas Instruments
U1
1
TLV7011DCKR
Texas Instruments
U2
1
S8050 J3Y (hFE 200-350)
S8050
Jiangsu Changjing Electronics Technology
Q1
1
DNI
XIAO_LEFT
Generic / hand assembly
J1
1
DNI
XIAO_RIGHT
Generic / hand assembly
J2
1
SM02B-GHS-TB(LF)(SN)
TX CABLE
JST
J3
1
SM02B-GHS-TB(LF)(SN)
JST GH LED
JST
J4
1
VSMB1940X01
Vishay
D1
1
VEMD10940FX01
Vishay
D2
1
CL10A105KB8NNNC
1u
Samsung Electro-Mechanics
C1
1
CC0402JRNPO9BN121
120p
YAGEO
C2
1
0402B102K500NT
1n
Fenghua Advanced Technology
C3
1
0402CG4R7C500NT
4.7p
Fenghua Advanced Technology
C4
2
CL05B104KO5NNNC
100n
Samsung Electro-Mechanics
C5, C6
1
0603WAF390JT5E
39R
UNI-ROYAL
R1
1
0402WGF1001TCE
1k
UNI-ROYAL
R2
4
0603WAF1002T5E
10k
UNI-ROYAL
R3, R4, R7, R9
1
0402WGF3302TCE
33k
UNI-ROYAL
R5
1
0603WAF1602T5E
16k
UNI-ROYAL
R6
1
0402WGF5603TCE
560k
UNI-ROYAL
R8
Show 2 more
QtyPartRefs
1
0402WGF1004TCE
1M
UNI-ROYAL
R10
1
0402WGF1000TCE
100R
UNI-ROYAL
R11

Ir spoke link design files

The KiCad project lives in the niklasdathe/IRBicycleWheelSpeedSensor repository on GitHub; these links point at the commit this page was built from.

Ir spoke link: common questions

How big is the Ir spoke link PCB?

The Ir spoke link measures 21 × 37.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Ir spoke link?

26 components, from 22 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 Ir spoke link design files?

From the niklasdathe/IRBicycleWheelSpeedSensor 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 Ir spoke link design in my own project?

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

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