2 layers21.5 × 12 mm
2 layers48 × 72 mm
Tachometer
Numata-wasa/Tachometer- Size
- 48 × 72 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 22
- Nets
- 69
- Pads
- 131
- Tracks, vias
- 89, 82
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 11 Dec 2025
- Updated
- 20 Feb 2026
Overview
Tachometer is an open-source printed circuit board by Numata-wasa, from the Numata-wasa/Tachometer repository on GitHub, published under the MIT licence. It is a 2-layer board of 48 × 72 mm with 22 parts on 69 nets, routed with 89 tracks and 82 vias.
It is built around the LM393N. Its parts include 5 resistors, 5 connectors, 1 capacitor, 1 IC and 1 diode. It belongs with the RP2040 boards of this library.
Main components
1README
README.mdtachometer
Parts
22| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R101, R102, R103, R104 |
| 2 | R_Potentiometer | Potentiometer_THT:Potentiometer_Bourns_3296P_Horizontal | RV101, RV102 |
| 1 | 0.1u | Capacitor_THT:C_Axial_L5.1mm_D3.1mm_P10.00mm_Horizontal | C101 |
| 1 | 4.7k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R105 |
| 1 | Battery | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J102 |
| 1 | LM393N | Package_DIP:CERDIP-8_W7.62mm_SideBrazed | U101 |
| 1 | LOGO | Library:wasa_10mm | G*** |
| 1 | OUT_EX | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J101 |
| 1 | Power | LED_THT:LED_D5.0mm | D101 |
| 1 | Power_EX | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J105 |
| 1 | RaspberryPi_Pico | Module:RaspberryPi_Pico_Common_Unspecified | A101 |
| 1 | SW_SPST | Button_Switch_THT:SW_Slide-03_Wuerth-WS-SLTV_10x2.5x6.4_P2.54mm | SW101 |
| 1 | ch1 | Connector_JST:JST_PH_B3B-PH-K_1x03_P2.00mm_Vertical | J104 |
| 1 | ch2 | Connector_JST:JST_PH_B3B-PH-K_1x03_P2.00mm_Vertical | J103 |
The 18 most common of 22 parts.
Questions
How big is the Tachometer PCB?
It measures 48 × 72 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Tachometer use?
22 parts, built around the LM393N. 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 Tachometer KiCad files?
From the Numata-wasa/Tachometer repository on GitHub, at the commit this page was made from: the board is haradware/tachometer/tachometer.kicad_pcb and its schematic haradware/TachoSensor/TachoSensor/TachoSensor.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Tachometer design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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