2 layers29 × 38.5 mm PPG Lab, the printed circuit board in 3D

PPG Lab

I made a design of a PCB for an PPG sensor using Kicad

Size: 29 × 38.5 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 14
Nets: 9
Pads: 36
Tracks, vias: 59, 1
Pours: 1
Routed: Yes
KiCad: KiCad 8.0 (file 20240108)
Created: 23 Sep 2026
Updated: 23 Sep 2026

Overview

PPG Lab is an open-source printed circuit board by ThrainnLeo, from the ThrainnLeo/PPG---Design repository on GitHub. It is a 2-layer board of 29 × 38.5 mm with 14 parts on 9 nets, routed with 59 tracks and 1 via.

It is built around the LPT 80A. Its parts include 6 resistors, 3 capacitors, 2 diodes, 1 IC and 1 transistor.

Main components

LPT 80A
插件-40℃~+100℃ 100mW 30V 50mA 50nA 850nm 插件 Phototransistors ROHSOSRAM Opto SemiconPhototransistors

Project files

Show this board on your page

https://pcbkit.io/boards/ThrainnLeo/PPG---Design

The board's own page, for a message or a post.

Source

Repository: ThrainnLeo/PPG---Design
Board file: PPG_Lab.kicad_pcb
Commit: 850fe5b
Licence: Not stated

Parts

Qty	Value	Footprint	References
2	100K	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R3, R4
1	100n	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C3
1	10K	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R2
1	150	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R1
1	22n	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C2
1	22u	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C1
1	33	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R6
1	390K	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R5
1	Conn_01x04_Pin	Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical	J1
1	IR LED	LED_THT:LED_D5.0mm	D1
1	LPT80A	OptoDevice:Osram_LPT80A	Q1
1	MCP6002-xP	Package_DIP:DIP-8_W7.62mm_LongPads	U1
1	RED LED	LED_THT:LED_D5.0mm	D2

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Questions

How big is the PPG Lab PCB?

It measures 29 × 38.5 mm and has 2 copper layers, 1.6 mm thick.

What parts does the PPG Lab use?

14 parts, built around the LPT 80A. 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 PPG Lab KiCad files?

From the ThrainnLeo/PPG---Design repository on GitHub, at the commit this page was made from: the board is PPG_Lab.kicad_pcb and its schematic PPG_Lab.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the PPG Lab design in my own project?

Its repository states no licence, so its author keeps all rights: ask ThrainnLeo before reusing the design.