2 layers
Nrf bga
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12 parts14kMIT
2 layers70 × 33 mm
Kelvin
voltlog/kelvin-leads14Source files for the 4 wire Kelvin test leads
- Size
- 70 × 33 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 12
- Nets
- 5
- Pads
- 11
- Tracks, vias
- 9, 19
- Pours
- 7
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 20 Aug 2020
- Updated
- 6 Feb 2021
Overview
Kelvin is an open-source printed circuit board by voltlog, from the voltlog/kelvin-leads repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 70 × 33 mm with 12 parts on 5 nets, routed with 9 tracks and 19 vias.
README
README.mdkelvin-leads
By default the Hantek TO11 (1832C) LCR meter only comes with a pair of short standard aligator clips. In order to perform more accurate measurements I built this 4 wire Kelvin connection test lead set with the proper clips where the top and bottom jaw are not electrically connected. The repository includes the source files for making the PCB that is used as the connection with the LCR meter as well as step files for 3d printing the enclosure of the connector.
Here is a list of supplies that you will need to complete the project:
- Kelvin 4Wire Alligator Clips
- Aliexpress http://voltlog.com/y/pjwy5
- Ebay http://voltlog.com/y/kvx4w
- 28AWG Shielded 2 Wire Cable
- Aliexpress http://voltlog.com/y/ktmr1
- Ebay http://voltlog.com/y/s3x4w
- PCB Connector Kicad/Gerber (in this repository)
- Connector casing (step files in this repository)
Alternatively you can order the PCB + enclosure from my Tindie store.
More info about this project in Voltlog #326.
Parts
12| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 3mm | MountingHole:MountingHole_3.2mm_M3 | M4, M5 |
| 2 | 5mm | MountingHole:MountingHole_5.3mm_M5 | M1, M3 |
| 2 | GUARD | TestPoint:TestPoint_Pad_4.0x4.0mm | TP5, TP6 |
| 1 | HCUR | TestPoint:TestPoint_Pad_4.0x4.0mm | TP2 |
| 1 | HPOT | TestPoint:TestPoint_Pad_4.0x4.0mm | TP1 |
| 1 | LCUR | TestPoint:TestPoint_Pad_4.0x4.0mm | TP4 |
| 1 | LOGO | voltlog_battery:voltlog_logo | G*** |
| 1 | LPOT | TestPoint:TestPoint_Pad_4.0x4.0mm | TP3 |
| 1 | M2 | MountingHole:MountingHole_2.1mm | M2 |
Questions
How big is the Kelvin PCB?
It measures 70 × 33 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Kelvin use?
12 parts. 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 Kelvin KiCad files?
From the voltlog/kelvin-leads repository on GitHub, at the commit this page was made from: the board is PCB/kicad/kelvin.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Kelvin 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).
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