2 layers16.8 × 40.3 mm
Lightbarriersyncopamp
TheTesla/lightbarriersync
Robust light barrier with snychronized carrierer wave receiver
44 parts
2 layers20.3 × 40.5 mm
Lightbarriersync
TheTesla/lightbarriersyncRobust light barrier with snychronized carrierer wave receiver
- Size
- 20.3 × 40.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 53
- Nets
- 31
- Pads
- 113
- Tracks, vias
- 225, 10
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 18 Apr 2026
- Updated
- 26 May 2026
Overview
Lightbarriersync is an open-source printed circuit board by TheTesla, from the TheTesla/lightbarriersync repository on GitHub. It is a 2-layer board of 20.3 × 40.5 mm with 53 parts on 31 nets, routed with 225 tracks and 10 vias.
It is built around the 1N4148W, BZV55B3V9 and MMBFJ113, with the SFH 203 and SFH 4546 among its other parts. Its parts include 18 resistors, 12 transistors, 11 capacitors, 8 diodes and 1 connector.
Main components
5
1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching Diodes
BZV55B3V9
-- Zener Diodes ROHSTaiwan SemiconductorZener Diodes
MMBFJ113
SOT-23-55℃~+150℃ 1 N-channel 100Ω 350mW 500mV、3V N-Channel SOT-23 JFETs ROHSonsemiMOSFETs
SFH 203
插件-40℃~+100℃ 150mW 1nA 20° 400nm~1100nm 50V 850nm Plugin Photodiodes ROHSOSRAM Opto SemiconPhotodiodes
SFH 4546
插件-40℃~+100℃ 1.5V 130mW/sr@IF=100mA 950nm 插件 Infrared LED Emitters ROHSOSRAM Opto SemiconInfrared LED Emitters
README
README.mdLight Barrier Synchronous
This is a robust continuous wave modulated light barrier with a synchronous detector. The sensitivity is very low against other modulated ligth sources. All electrical interfaces are protected against reverse polarity, over voltage and over current.
It contains only easily available discrete standard components and the board has only one solder side.
Technical Data
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Voltage | 3.3 | 5 | 35 | V |
| Current Consumption | 10 | mA | ||
| Output Sink Current | 800 | uA | ||
| Temperature Range | 0 | 70 | °C | |
| Carrier Frequency | 7 | kHz |
Pictures
Parts
53| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 10k | Resistor_SMD:R_0805_2012Metric | R2, R3, R8, R10, R11, R12, R13, R18 |
| 7 | 100 nF | Capacitor_SMD:C_0805_2012Metric | C1, C5, C6, C8, C9, C10, C11 |
| 7 | 100k | Resistor_SMD:R_0805_2012Metric | R4, R5, R6, R7, R14, R15, R16 |
| 6 | 2N7002 | Package_TO_SOT_SMD:SOT-23 | Q2, Q3, Q7, Q8, Q11, Q12 |
| 5 | 1N4148W | Diode_SMD:D_SOD-123 | D2, D3, D4, D6, D9 |
| 5 | BC850 | Package_TO_SOT_SMD:SOT-23 | Q4, Q5, Q6, Q9, Q10 |
| 2 | 1 nF | Capacitor_SMD:C_0805_2012Metric | C2, C3 |
| 2 | 10 nF | Capacitor_SMD:C_0805_2012Metric | C4, C7 |
| 2 | 100 | Resistor_SMD:R_0805_2012Metric | R1, R17 |
| 1 | 1k | Resistor_SMD:R_0805_2012Metric | R9 |
| 1 | BZV55B3V9 | Diode_SMD:D_MiniMELF | D1 |
| 1 | Conn_01x03_Pin | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J1 |
| 1 | MMBFJ113 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | SFH203 | LED_THT:LED_D5.0mm_IRGrey | D7 |
| 1 | SFH4546 | LED_THT:LED_D5.0mm_IRGrey | D5 |
The 50 most common of 53 parts.
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Questions
How big is the Lightbarriersync PCB?
It measures 20.3 × 40.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Lightbarriersync use?
53 parts, built around the 1N4148W, BZV55B3V9, MMBFJ113 and SFH 203. 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 Lightbarriersync KiCad files?
From the TheTesla/lightbarriersync repository on GitHub, at the commit this page was made from: the board is src/elec/lightbarriersync/lightbarriersync.kicad_pcb and its schematic src/elec/lightbarriersync/lightbarriersync.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Lightbarriersync design in my own project?
Its repository states no licence, so its author keeps all rights: ask TheTesla before reusing the design.