2 layers45.9 × 25.6 mm
2 layers45.9 × 25.6 mm
Sensor V1.0
Squantor/PPG_sensor_research4- Size
- 45.9 × 25.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 55
- Nets
- 57
- Pads
- 140
- Tracks, vias
- 268, 22
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 8 Jul 2020
- Updated
- 9 Oct 2022
Overview
Sensor V1.0 is an open-source printed circuit board by Squantor, from the Squantor/PPG_sensor_research repository on GitHub, published under the MIT licence. It is a 2-layer board of 45.9 × 25.6 mm with 55 parts on 57 nets, routed with 268 tracks and 22 vias.
It is built around the MCP6541R and BC846. Its parts include 12 resistors, 11 capacitors, 3 ICs, 3 connectors and 1 transistor. It belongs with the sensors and measurement boards of this library.
Main components
2README
electronics/Sensor_V1.0/README.mdPPG sensor hardware Version 1.0
After making a raw prototype where some tests have been done it is time to make a PCB version.
HSI (Hardware Software Interface)
This applies to a project that has a embedded software component. Describe what each pin/bus does, what it is connected to, what its function is and some "safe" behaviour when starting up.
TODO's
Still some things need to be done:
- Further filling in this project description.
- schematic entry
- PCB layout
- Review with one night in between
- Produce at OSHPARK
- Assemble
- Test & characterise
- update Readme.md with pictures and BOM
BOM
This is a list of hardware components. If just mentioned a generic component like a 1K 0402 resistor, just name it as such, free to substitute. If you need some special integrated IC's show some sources like Mouser, Digikey, Farnell, or LCSC
- SFH2440 Photodiode
- Shine through PCB mount LEDs
Pictures
Measurement results
Parts
55| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | R | SquantorRcl:R_0603_hand | R7, R12, R15, R16, R17, R18 |
| 5 | 1u | SquantorRcl:C_0603 | C1, C3, C5, C10, C11 |
| 4 | 600 | SquantorRcl:L_0603 | FB1, FB2, FB3, FB4 |
| 3 | 10u | SquantorRcl:C_0603 | C2, C4, C6 |
| 3 | 4n7 | SquantorRcl:C_0805+0603 | C7, C8, C9 |
| 2 | 100 | SquantorRcl:R_0603_hand | R1, R2 |
| 2 | 1K | SquantorRcl:R_0603_hand | R3, R4 |
| 2 | guard | SquantorTestPoints:TestPoint_pad_circle_D05 | TP5, TP6 |
| 1 | 100K | SquantorRcl:R_0603_hand | R8 |
| 1 | 20200812 | SquantorLabels:Label_Generic | N2 |
| 1 | 4K7 | SquantorRcl:R_0603_hand | R11 |
| 1 | AVDD divider | SquantorSpecial:solder_jumper_2way_noconn | JP4 |
| 1 | BC846 | SquantorIC:SOT23-3 | Q1 |
| 1 | Cmp Out | SquantorTestPoints:TestPoint_hole_H03R05 | TP13 |
| 1 | DevBoardUartInput | Connector_JST:JST_PH_B4B-PH-SM4-TB_1x04-1MP_P2.00mm_Vertical | J5 |
| 1 | Div out | SquantorTestPoints:TestPoint_hole_H03R05 | TP11 |
| 1 | I reset | SquantorTestPoints:TestPoint_hole_H03R05 | TP12 |
| 1 | JLCJLCJLCJLC | SquantorLabels:Label_Generic | N3 |
| 1 | LED1 | SquantorTestPoints:TestPoint_hole_H03R05 | TP3 |
| 1 | LED2 | SquantorTestPoints:TestPoint_hole_H03R05 | TP4 |
| 1 | MCP6541 | SquantorIC:SOT23-5-Microchip-OT | U3 |
| 1 | OHWLOGO | Symbol:OSHW-Symbol_6.7x6mm_SilkScreen | N1 |
| 1 | PD out | SquantorTestPoints:TestPoint_hole_H03R05 | TP10 |
| 1 | PPG_sensor | SquantorOpto:PPG_sensor_reverse_PD_antiparallel | U1 |
| 1 | RX | SquantorTestPoints:TestPoint_hole_H03R05 | TP1 |
| 1 | TX | SquantorTestPoints:TestPoint_hole_H03R05 | TP2 |
| 1 | VDDA | SquantorTestPoints:TestPoint_hole_H03R05 | TP7 |
| 1 | VREF divider | SquantorSpecial:solder_jumper_2way_noconn | JP5 |
| 1 | VSSA | SquantorTestPoints:TestPoint_hole_H03R05 | TP8 |
| 1 | bias REF | SquantorSpecial:solder_jumper_2way_noconn | JP3 |
| 1 | bias VBUS | SquantorSpecial:solder_jumper_2way_noconn | JP2 |
| 1 | bias VDD | SquantorSpecial:solder_jumper_2way_noconn | JP1 |
| 1 | guard | SquantorTestPoints:TestPoint_hole_H03R05 | TP9 |
| 1 | nuclone_small_left | SquantorConnectors:Header-0254-2X10-H010 | J1 |
| 1 | nuclone_small_right | SquantorConnectors:Header-0254-2X10-H010 | J2 |
| 1 | reference_sot23-3 | SquantorIC:SOT23-3 | U2 |
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Questions
How big is the Sensor V1.0 PCB?
It measures 45.9 × 25.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Sensor V1.0 use?
55 parts, built around the MCP6541R and BC846. 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 V1.0 KiCad files?
From the Squantor/PPG_sensor_research repository on GitHub, at the commit this page was made from: the board is electronics/Sensor_V1.0/Sensor_V1.0.kicad_pcb and its schematic electronics/LED_DET_cluster_V0.1/LED_DET_cluster_V0.1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sensor V1.0 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).