2 layers49.5 × 49.5 mm
2 layers39.4 × 20.3 mm
Psense
noahp/psense3🔌 Basic USB interfaced power sensor
- Size
- 39.4 × 20.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 25
- Nets
- 27
- Pads
- 70
- Tracks, vias
- 113, 4
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 8 Feb 2017
- Updated
- 6 Apr 2019
Overview
Psense is an open-source printed circuit board by noahp, from the noahp/psense repository on GitHub. It is a 2-layer board of 39.4 × 20.3 mm with 25 parts on 27 nets, routed with 113 tracks and 4 vias.
It is built around the MCP2221A-I/P. Its parts include 8 resistors, 3 capacitors, 2 ICs, 1 diode and 1 connector.
Main components
1README
README.mdpsense
USB interfaced, 2-channel current + voltage meter.
Schematic
Parts
USB
- USB to I2C interface
- bus powered, no external crystal needed
http://www.mouser.com/ProductDetail/Microchip-Technology/MCP2221A-I-SL
Meter
- 2 channel current + bus voltage (0-40V)
- I2C interface
- adjustable range +/-10mV, 20mV, 40mV, 80mV
http://www.mouser.com/ProductDetail/Microchip/PAC1720-1-AIA-TR
Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 0.1R | kicadlib:SMD_0603_R | R1, R3 |
| 2 | 1.0R | kicadlib:SMD_0603_R | R2, R4 |
| 2 | 4.7K | kicadlib:SMD_0603_R | R7, R8 |
| 1 | 0.1µF | kicadlib:SMD_0603_C | C1 |
| 1 | 0.22-0.47µF | kicadlib:SMD_0603_C | C3 |
| 1 | 10K | kicadlib:SMD_0603_R | R5 |
| 1 | 10µF | kicadlib:SMD_0603_C | C2 |
| 1 | 1K | kicadlib:SMD_0603_R | R6 |
| 1 | I2C ACTIVE LED | kicadlib:SMD_0603_LED_REVERSED | D1 |
| 1 | MCP2221A | kicadlib:SMD_14-SOIC | U2 |
| 1 | PAC1720 | kicadlib:SMD_10-DFN | U1 |
| 1 | S1_IN | kicadlib:TEST_0.100 | TP5 |
| 1 | S1_OUT | kicadlib:TEST_0.100 | TP1 |
| 1 | S1_SEL_C | kicadlib:TEST_0.100 | TP4 |
| 1 | S1_SEL_H | kicadlib:TEST_0.100 | TP2 |
| 1 | S1_SEL_L | kicadlib:TEST_0.100 | TP3 |
| 1 | S2_IN | kicadlib:TEST_0.100 | TP10 |
| 1 | S2_OUT | kicadlib:TEST_0.100 | TP6 |
| 1 | S2_SEL_C | kicadlib:TEST_0.100 | TP9 |
| 1 | S2_SEL_H | kicadlib:TEST_0.100 | TP7 |
| 1 | S2_SEL_L | kicadlib:TEST_0.100 | TP8 |
| 1 | USB-micro-b | kicadlib:SMD_MICRO_USB_B_WPEGS | J1 |
Questions
How big is the Psense PCB?
It measures 39.4 × 20.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Psense use?
25 parts, built around the MCP2221A-I/P. 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 Psense KiCad files?
From the noahp/psense repository on GitHub, at the commit this page was made from: the board is psense.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Psense design in my own project?
Its repository states no licence, so its author keeps all rights: ask noahp before reusing the design.
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