2 layers20.3 × 40.5 mm
Lightbarriersync
TheTesla/lightbarriersync
Robust light barrier with snychronized carrierer wave receiver
53 parts
2 layers16.8 × 40.3 mm
Lightbarriersyncopamp
TheTesla/lightbarriersyncRobust light barrier with snychronized carrierer wave receiver
- Size
- 16.8 × 40.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 44
- Nets
- 33
- Pads
- 112
- Tracks, vias
- 216, 14
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 18 Apr 2026
- Updated
- 26 May 2026
Overview
Lightbarriersyncopamp is an open-source printed circuit board by TheTesla, from the TheTesla/lightbarriersync repository on GitHub. It is a 2-layer board of 16.8 × 40.3 mm with 44 parts on 33 nets, routed with 216 tracks and 14 vias.
It is built around the TLV9004IDR-MS, BSS123 and 1N4148W, with the BAT46W, BSS84 and BZV55B15 among its other parts. Its parts include 19 resistors, 7 capacitors, 7 diodes, 7 transistors and 2 ICs.
Main components
6
TLV9004IDR-MS
SOIC-14-2.75V~-900mV、900mV~2.75V -40℃~+85℃ 1.8V~5.5V 1.8uV/℃ 1MHz 1V/us 1mV 1pA 28uA 4 45mA 5pA 65nV/√Hz@1kHz 80dB Rail-to-Rail Input, Rail-to-Rail Output SOIC-14 Operational Amplifier ROHSMSKSEMIOperational Amplifier
BSS123
SOT-23-55℃~+150℃ 1 N-channel 1.4V 1.4nC@10V 100V 170mA 22pF 2pF 3.5pF 680mW 6Ω@10V、10Ω@4.5V N-Channel SOT-23 MOSFETs ROHShongjiachengMOSFETs
1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching Diodes
BAT46W
SOD-123-55℃~+125℃ 1 Independent 100V 150mA 2uA@75V 450mV@10mA 750mA SOD-123 Schottky Diodes ROHSDiodes IncorporatedSchottky DiodesBSS84
SOT-23-55℃~+150℃ 1 P-Channel 130mA 2.8pF 24.6pF 2V 3.2Ω@5V 300mW 4.7pF 50V 590pC@10V SOT-23 MOSFETs ROHSDiodes IncorporatedMOSFETs
BZV55B15
LL-341 Independent 100nA@11V 14.7V~15.29V 500mW LL-34 Zener Diodes ROHSYONGYUTAIZener Diodes
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
44| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | 10k | Resistor_SMD:R_0805_2012Metric | R1, R2, R5, R6, R7, R8, R12, R13, R14, R16, R18, R19, R21 |
| 4 | BSS123 | Package_TO_SOT_SMD:SOT-23 | Q2, Q4, Q5, Q7 |
| 3 | 2u2 | Capacitor_SMD:C_0805_2012Metric | C1, C2, C7 |
| 2 | 100 | Resistor_SMD:R_0805_2012Metric | R4, R22 |
| 2 | 100k | Resistor_SMD:R_0805_2012Metric | R3, R17 |
| 2 | 1N4148W | Diode_SMD:D_SOD-123 | D5, D7 |
| 2 | 1k | Resistor_SMD:R_0805_2012Metric | R11, R20 |
| 2 | 1n | Capacitor_SMD:C_0805_2012Metric | C4, C5 |
| 2 | BAT46W | Diode_SMD:D_SOD-123 | D2, D8 |
| 2 | BC850 | Package_TO_SOT_SMD:SOT-23 | Q3, Q6 |
| 1 | 100n | Capacitor_SMD:C_0805_2012Metric | C6 |
| 1 | 47p | Capacitor_SMD:C_0805_2012Metric | C3 |
| 1 | BSS84 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | BZV55B15 | Diode_SMD:D_MiniMELF | D1 |
| 1 | Conn_01x03_Pin | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J1 |
| 1 | LP2951-3.3_SOIC | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | TLV9004IDR | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U2 |
| 1 | WP7113F3BT | LED_THT:LED_D5.0mm_IRGrey | D3 |
| 1 | WP7113PD1BT | LED_THT:LED_D5.0mm_IRGrey | D6 |
The 43 most common of 44 parts.
Questions
How big is the Lightbarriersyncopamp PCB?
It measures 16.8 × 40.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Lightbarriersyncopamp use?
44 parts, built around the TLV9004IDR-MS, BSS123, 1N4148W and BAT46W. 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 Lightbarriersyncopamp KiCad files?
From the TheTesla/lightbarriersync repository on GitHub, at the commit this page was made from: the board is src/elec/lightbarriersyncopamp/lightbarriersyncopamp.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 Lightbarriersyncopamp design in my own project?
Its repository states no licence, so its author keeps all rights: ask TheTesla before reusing the design.
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