2 layers110 × 50 mm
2 layers41 × 29.5 mm
Clap Switch
SodiumMan13/Clap_SwitchA PCB that has an LED turn on when someone claps.
- Size
- 41 × 29.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 10
- Nets
- 8
- Pads
- 27
- Tracks, vias
- 72, 0
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 2 Oct 2026
- Updated
- 2 Nov 2026
Overview
Clap Switch is an open-source printed circuit board by SodiumMan13, from the SodiumMan13/Clap_Switch repository on GitHub. It is a 2-layer board of 41 × 29.5 mm with 10 parts on 8 nets, routed with 72 tracks and 0 vias.
It is built around the NE555D and BC547. Its parts include 4 resistors, 1 capacitor, 1 IC, 1 diode and 1 transistor.
Main components
2README
README.mdClap_Switch
A PCB that has an LED turn on when someone claps. I chose this because I am a beginner and wanted to learn the process of how PCB design works.
The clap switch is powered by a 9v battery, which is connected by a battery snap. A condenser microphone senses loud noises like a clap, and with a transistor, turns on an LED with a NE555 timer to control how long it stays on. This is a good project for beginners as it is simple, but still teaches the basics of PCB design.
These are the schematics:
This is the final PCB:
This is my first hardware project.
Parts
10| Qty | Value | Footprint | References |
|---|---|---|---|
| 1 | 100k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
| 1 | 10uF | Capacitor_THT:CP_Axial_L18.0mm_D10.0mm_P25.00mm_Horizontal | C1 |
| 1 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3 |
| 1 | 220 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2 |
| 1 | 47K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R4 |
| 1 | BC547 | Package_TO_SOT_THT:TO-92_HandSolder | Q1 |
| 1 | Battery Cell | Connector_PinHeader_2.00mm:PinHeader_1x02_P2.00mm_Vertical | BT1 |
| 1 | LED | LED_THT:LED_D3.0mm_Clear | D1 |
| 1 | Microphone_Condenser | Myfootprints:Condenser_Mic | MK1 |
| 1 | NE555D | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U2 |
Questions
How big is the Clap Switch PCB?
It measures 41 × 29.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Clap Switch use?
10 parts, built around the NE555D and BC547. 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 Clap Switch KiCad files?
From the SodiumMan13/Clap_Switch repository on GitHub, at the commit this page was made from: the board is PCB/Clap_Switch.kicad_pcb and its schematic PCB/Clap_Switch.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Clap Switch design in my own project?
Its repository states no licence, so its author keeps all rights: ask SodiumMan13 before reusing the design.
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