2 layers100 × 130.1 mm
BerlinUhr
designer2k2/BerlinUhr
Berlin Uhr or Mengenlehreuhr, a fancy retro style clock
62 parts7GPL-3.0
2 layers51 × 65.5 mm
This repo contains my first PCB design, a smiley face board with LEDs controlled by a TLC5947 driver chip.
- Size
- 51 × 65.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 28
- Nets
- 33
- Pads
- 101
- Tracks, vias
- 526, 45
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 3 Jan 2026
- Updated
- 8 May 2026
Overview
Smiley is an open-source printed circuit board by Rob-Sligter, from the Rob-Sligter/Smiley-LED-PCB repository on GitHub. It is a 2-layer board of 51 × 65.5 mm with 28 parts on 33 nets, routed with 526 tracks and 45 vias.
It is built around the TLC5947DAP. Its parts include 24 diodes, 1 capacitor, 1 resistor, 1 IC and 1 connector.
Main components
1README
README.mdSmiley LED PCB
My first PCB design! A smiley face board with LEDs that light up the outline, eyes, and mouth using the TLC5947 LED driver.
Features
- Smiley face design with LED-lit features
- TLC5947 LED driver chip for individual LED control
- 12-bit PWM control per LED channel
- Chainable design (via serial data)
Hardware
- LED Driver: TLC5947
- Datasheet: TLC5947 on TI website
Files
Smiley.kicad_pcb- PCB layoutSmiley.kicad_sch- Schematicproduction/- Production files (BOM, positions, netlist)mfr/- Gerber files for manufacturing
Manufacturing
Gerber files and drill files are ready in the mfr/ directory. BOM and position files are in production/.
PCBWay Recommendation: I highly recommend PCBWay for manufacturing. They offer great service, quick turnaround times, and are very helpful. I especially appreciate the human contact through their message center—they personally confirm placements and part selections with you, ensuring everything is perfect before production.
License
Open source hardware - feel free to modify and share!
Parts
28| Qty | Value | Footprint | References |
|---|---|---|---|
| 24 | LED | LED_SMD:LED_0805_2012Metric | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +8 |
| 1 | 0.1NF | Capacitor_SMD:C_0805_2012Metric | C1 |
| 1 | 2.4 Kohm | Resistor_SMD:R_0805_2012Metric | R1 |
| 1 | Conn_01x06 | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Horizontal | J1 |
| 1 | TLC5947DAP | Package_SO:HTSSOP-32-1EP_6.1x11mm_P0.65mm_EP5.2x11mm_Mask4.11x4.36mm | U1 |
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Questions
How big is the Smiley PCB?
It measures 51 × 65.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Smiley use?
28 parts, built around the TLC5947DAP. 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 Smiley KiCad files?
From the Rob-Sligter/Smiley-LED-PCB repository on GitHub, at the commit this page was made from: the board is Smiley.kicad_pcb and its schematic Smiley.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Smiley design in my own project?
Its repository states no licence, so its author keeps all rights: ask Rob-Sligter before reusing the design.