2 layers18.5 × 11.1 mm
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byrantech/laptop
anyon_e, a highly integrated, high end, open source laptop. Attempt the impossible.
6 parts4.3kMIT
2 layers41.7 × 59.3 mm
Lightsensing
dave9123/lightsensingA board that turns an LED on if no light is detected!
- Size
- 41.7 × 59.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 6
- Nets
- 5
- Pads
- 14
- Tracks, vias
- 35, 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 27 Apr 2025
- Updated
- 7 Jun 2025
Overview
Lightsensing is an open-source printed circuit board by dave9123, from the dave9123/lightsensing repository on GitHub. It is a 2-layer board of 41.7 × 59.3 mm with 6 parts on 5 nets, routed with 35 tracks and 1 via.
Its parts include 3 resistors, 1 diode and 1 transistor.
README
README.mdLightsensing
A board that turns an LED on if no light is detected. Gerbers can be found at pcb/gerber_to_order
Features
- Customizable photoresistor resistance using a potentiometer
- Small design
BOM
- 1x Keystone 3034 CR2032 Battery Holder
- 1x 3362P-1-103 Potentiometer
- 1x 2N3906 PNP Transistor
- 1x THT LED
- 220 Ohm THT Resistor
- 47k Ohm THT Resistor
| Schematics | PCB | 3D View |
|---|---|---|
 |  |  |
Parts
6| Qty | Value | Footprint | References |
|---|---|---|---|
| 1 | 220 | PCM_Resistor_THT_AKL:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R1 |
| 1 | 47k | PCM_Resistor_THT_AKL:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R3 |
| 1 | Battery | Battery:BatteryHolder_Keystone_3034_1x20mm | BT1 |
| 1 | LED | LED_THT:LED_D5.0mm_Clear | D1 |
| 1 | PNP | Package_TO_SOT_THT:TO-92_Inline | Q1 |
| 1 | R_Photo | OptoDevice:R_LDR_5.0x4.1mm_P3mm_Vertical | R2 |
Questions
How big is the Lightsensing PCB?
It measures 41.7 × 59.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Lightsensing use?
6 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 Lightsensing KiCad files?
From the dave9123/lightsensing repository on GitHub, at the commit this page was made from: the board is pcb/lightsensing.kicad_pcb and its schematic pcb/lightsensing.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Lightsensing design in my own project?
Its repository states no licence, so its author keeps all rights: ask dave9123 before reusing the design.
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