2 layers68.6 × 53.3 mm
2 layers43.2 × 154.3 mm
Ckt axle bar array
IowaScaledEngineering/ckt-axleAxle Counter / Speed Sensor
- Size
- 43.2 × 154.3 mm
- Copper layers
- 2
- Thickness
- 0.61 mm
- Parts
- 84
- Nets
- 48
- Pads
- 186
- Tracks, vias
- 228, 66
- Pours
- 19
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 1 Jul 2024
- Updated
- 7 Sep 2026
Overview
Ckt axle bar array is an open-source printed circuit board by IowaScaledEngineering, from the IowaScaledEngineering/ckt-axle repository on GitHub. It is a 2-layer board of 43.2 × 154.3 mm with 84 parts on 48 nets, routed with 228 tracks and 66 vias.
It is built around the SM04B-SRSS-TB and SSM6N357R,LF. Its parts include 24 resistors, 12 transistors, 6 capacitors, 6 diodes and 6 connectors.
Main components
2Parts
84| Qty | Value | Footprint | References |
|---|---|---|---|
| 24 | NPTH | NPTH | KiKit_MB_1_1, KiKit_MB_1_2, KiKit_MB_1_3, KiKit_MB_1_4, KiKit_MB_2_1, KiKit_MB_2_2, KiKit_MB_2_3, KiKit_MB_2_4, KiKit_MB_3_1, KiKit_MB_3_2, KiKit_MB_3_3, KiKit_MB_3_4, KiKit_MB_4_1, KiKit_MB_4_2, KiKit_MB_4_3, KiKit_MB_4_4 +8 |
| 12 | 10k | Resistor_SMD:R_0805_2012Metric | R3, R3, R3, R3, R3, R3, R4, R4, R4, R4, R4, R4 |
| 6 | 0.1uF | Capacitor_SMD:C_0805_2012Metric | C1, C1, C1, C1, C1, C1 |
| 6 | 150 | Resistor_SMD:R_0805_2012Metric | R1, R1, R1, R1, R1, R1 |
| 6 | 1k | Resistor_SMD:R_0805_2012Metric | R2, R2, R2, R2, R2, R2 |
| 6 | Fiducial | Fiducial | KiKit_FID_B_1, KiKit_FID_B_2, KiKit_FID_B_3, KiKit_FID_T_1, KiKit_FID_T_2, KiKit_FID_T_3 |
| 6 | IR LED | LED_SMD:LED_1206_3216Metric | D1, D1, D1, D1, D1, D1 |
| 6 | Q_Photo_NPN_EC | LED_SMD:LED_1206_3216Metric | Q1, Q1, Q1, Q1, Q1, Q1 |
| 6 | SM04B-SRSS | Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J1, J1, J1, J1, J1, J1 |
| 6 | SSM6N357R | ISE_Generic:TSOP6F | Q2, Q2, Q2, Q2, Q2, Q2 |
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Questions
How big is the Ckt axle bar array PCB?
It measures 43.2 × 154.3 mm and has 2 copper layers, 0.61 mm thick.
What parts does the Ckt axle bar array use?
84 parts, built around the SM04B-SRSS-TB and SSM6N357R,LF. 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 Ckt axle bar array KiCad files?
From the IowaScaledEngineering/ckt-axle repository on GitHub, at the commit this page was made from: the board is kicad/ckt-axle-bar/ckt-axle-bar-array.kicad_pcb and its schematic kicad/ard-axlesim/ard-axlesim.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Ckt axle bar array design in my own project?
Its repository states no licence, so its author keeps all rights: ask IowaScaledEngineering before reusing the design.