2 layers250 × 56 mm
Klock pcb
adriansalamon/clock-clock-24
Moved to https://git.salamon.xyz/adrian/clock-clock-24
45 parts1GPL-3.0
2 layers14 × 10 mm
TFPROBE01
ThunderFly-aerospace/TFPROBE011Omnipolar magnetic and reflective optical probe.
- Size
- 14 × 10 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 8
- Nets
- 4
- Pads
- 18
- Tracks, vias
- 38, 10
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 26 Oct 2020
- Updated
- 5 Mar 2025
Overview
TFPROBE01 is an open-source printed circuit board by ThunderFly-aerospace, from the ThunderFly-aerospace/TFPROBE01 repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 14 × 10 mm with 8 parts on 4 nets, routed with 38 tracks and 10 vias.
It is built around the AH3572-P-B and VCNT2020. Its parts include 2 resistors, 2 ICs, 1 capacitor and 1 connector. It belongs with the sensors and measurement and robots and motor control boards of this library.
Main components
2
AH3572-P-B
SIP-3-40℃~+125℃ 3V~28V 3mA 800kHz Omnipolar Open-drain ±2Gs ±3mT SIP-3 Hall Switches ROHSDiodes IncorporatedHall Switches
VCNT2020
SMD-4P0.5mm 1.25V 10us@0.8mA,100Ω、70us@0.8mA,100Ω 15us@0.8mA,100Ω、70us@0.8mA,100Ω 20V 20mA 940nm Phototransistor SMD-4P Reflective Optical Interrupters ROHSVishay IntertechnologyReflective Optical Interrupters
README
README.mdTFPROBE01A - Omnipolar magnetic and reflective optical sensor probe
The sensor is designed for RPM measurement with TFRPM01 sensor board. The probe consists dual sensing technique - optical or magnetic. Therefore the user should select the one most suitable for the application.
This device was developed by ThunderFly s.r.o. and is published as OpenSource hardware with a GPLv3 license. It is commercially available, for a quote contact us by email at info@thunderfly.cz. Or buy it directly together with a TFRPM01 sensor at Tindie store.
Magnetic Sensing
The magnetic Hall-effect sensor mounted on the probe board can sense both directions of the magnetic field. The strength of the magnetic field is a decisive parameter for the probe's correct function. The magnetic flux is expected to be perpendicular to the sensor PCB surface. The detailed requirements of magnetic flux density are described in AH3572 datasheet page 4.
In magnetic sensing, it is recommended to cover the probe in a black shrinking tube. The covering blocks function of a reflective sensor.
Optical Sensing
An optical sensor is sensitive to the infrared reflectance of material (usually a rotating disc with marks). To details see the VCNT2020 datasheet page 2
Hardware
TFPROBE01A is designed as Open-Hardware (GPL v3). All documentation is located in this repository.
The TFPROBE01 is sold and shipped without a soldered header, because its orientation may depend on the customer's use. Connecting cable and two headers (one straight and one right-angled) are included.
PCB
PCB dimensions
Optical and magnetic probe positions on PCB
Electronic schema
Full schema is available in PDF
Parts
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Questions
How big is the TFPROBE01 PCB?
It measures 14 × 10 mm and has 2 copper layers, 1.6 mm thick.
What parts does the TFPROBE01 use?
8 parts, built around the AH3572-P-B and VCNT2020. 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 TFPROBE01 KiCad files?
From the ThunderFly-aerospace/TFPROBE01 repository on GitHub, at the commit this page was made from: the board is hw/sch_pcb/TFPROBE01.kicad_pcb and its schematic hw/sch_pcb/TFPROBE01.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the TFPROBE01 design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).