Led star
About the Led star PCB
Led star is an open source PCB design by skiselev, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 91.4 × 101.6 mm, with 110 components from 11 distinct parts.
Other key parts include the 74*175. By type, the board carries 53 resistors, 49 diodes, 4 capacitors, 2 transistors, 1 IC and 1 connector.
From the project
Minimalist Computing - Holiday174 Design Contest - Blinking Star
This project is my submission for the Facebook's Minimalist Computing group Holiday Design Contest.
My design is an eight pointed star with animated LEDs. The shape is inspired by the Vintage Computing Christmas Challenge 2022.
The design includes: A multivibrator, implemented using two transistors - Q1 and Q2, four resistors - R50-R53, and two capacitors - C2 and C3. The multivibrator provides the clock for the rest of the circuit. The choosen values of the R52, R53 - 62 k, C2 and C3 - 2.2 uF result in approximately 5.3 Hz frequency. The formula to calculate the frequency is f = 1 /…
Main components on the Led star
Led star bill of materials (BOM)
110 components, 11 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74*175 | DIP-16_W7.62mm | U1 |
| 2 | 2N3904 | TO-92_Inline_Wide | Q1, Q2 |
| 1 | 5V | PinHeader_1x02_P2.54mm_Horizontal | J1 |
| 20 | Blue | LED_D3.0mm_Clear | D1, D2, D3, D6, D7, D8, D9, D13 +12 |
| 20 | Green | LED_D3.0mm_Clear | D4, D5, D10, D12, D16, D17, D18, D20 +12 |
| 9 | Red | LED_D3.0mm_Clear | D11, D19, D23, D24, D25, D26, D27, D31 +1 |
| 1 | 0.1uF | C_Rect_L7.0mm_W2.0mm_P5.00mm | C1 |
| 2 | 2.2uF | C_Rect_L7.0mm_W2.0mm_P5.00mm | C2, C3 |
| 1 | 47uF | CP_Radial_D5.0mm_P2.50mm | C4 |
| 51 | 4.7k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2, R3, R4, R5, R6, R7, R8 +43 |
| 2 | 62k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R52, R53 |
Led star design files
The KiCad project lives in the skiselev/led-star repository on GitHub; these links point at the commit this page was built from.
- LayoutKiCad/star.kicad_pcb
- SchematicKiCad/star.kicad_sch
Led star: common questions
How big is the Led star PCB?
The Led star measures 91.4 × 101.6 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Led star?
110 components, from 11 distinct parts. The full bill of materials is listed on this page.
Where can I download the Led star design files?
From the skiselev/led-star repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Led star design in my own project?
Yes, under the terms of its CERN-OHL-S-2.0 license, which skiselev chose for the repository.