4 layers57.3 × 41.4 mm
Panel sensor
xjjak/LapCal
Building gloves that enable typing on a 34-key keyboard without an actual physical keyboard using IMUs and machine learning.
168 parts3
4 layers12.4 × 19.7 mm
Sensor
xjjak/LapCal3Building gloves that enable typing on a 34-key keyboard without an actual physical keyboard using IMUs and machine learning.
- Size
- 12.4 × 19.7 mm
- Copper layers
- 4
- Thickness
- 1 mm
- Parts
- 13
- Nets
- 12
- Pads
- 48
- Tracks, vias
- 59, 17
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 2 Nov 2023
- Updated
- 22 Jul 2025
Overview
Sensor is an open-source printed circuit board by xjjak, from the xjjak/LapCal repository on GitHub. It is a 4-layer board of 12.4 × 19.7 mm with 13 parts on 12 nets, routed with 59 tracks and 17 vias.
It is built around the MPU-6050 and SM04B-SRSS-TB(LF)(SN). Its parts include 4 capacitors, 3 resistors, 1 IC, 1 diode and 1 connector. It belongs with the sensors and measurement boards of this library.
Main components
2
MPU-6050
QFN-24-EP(4x4)-40℃~+85℃ 16bit 1KB 2.375V~3.46V 5uA Accelerometer Gyroscope I2C X,Y,Z X,Y,Z ±16g ±2000dps QFN-24-EP(4x4) Accelerometers ROHSTDK InvenSenseAccelerometers
SM04B-SRSS-TB(LF)(SN)
SMD,P=1mm,卧贴-25℃~+85℃ 1 1A 1mm 1x4P 2.9mm 4 4.32mm 4P 50V 6mm Auxiliary Solder Pin Copper alloy PA SH Surface Mount, Right Angle Tin UL94V-0 White SMD,P=1mm,卧贴 Wire To Board Connector ROHSJSTWire To Board Connector
Parts
13| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 2 | 4k7 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2, R3 |
| 2 | MountingHole | MountingHole:MountingHole_2.1mm | H1, H2 |
| 1 | 10nF | Capacitor_SMD:C_0603_1608Metric | C4 |
| 1 | 2.2nF | Capacitor_SMD:C_0603_1608Metric | C3 |
| 1 | 2k | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | Blue | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | LOGO | xi-logo:xi-logo | G*** |
| 1 | MPU-6050 | Sensor_Motion:InvenSense_QFN-24_4x4mm_P0.5mm | U1 |
| 1 | SM04B-SRSS-TB(LF)(SN) | Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J1 |
Questions
How big is the Sensor PCB?
It measures 12.4 × 19.7 mm and has 4 copper layers, 1 mm thick.
What parts does the Sensor use?
13 parts, built around the MPU-6050 and SM04B-SRSS-TB(LF)(SN). 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 Sensor KiCad files?
From the xjjak/LapCal repository on GitHub, at the commit this page was made from: the board is Hardware/Electronics/SensorUnit/sensor/sensor.kicad_pcb and its schematic Hardware/Electronics/SensorUnit/sensor/sensor.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sensor design in my own project?
Its repository states no licence, so its author keeps all rights: ask xjjak before reusing the design.
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