2 layers271.8 × 114.3 mm
Ardumower mega shield svn
Ardumower/ardumower
Develop an open source robotic lawn mower (HW+SW reference platform)
426 parts282
2 layers115.7 × 41.3 mm
7-segment led
prashantbhandary/7-segment-ledA 4-digit multiplexed 7-segment LED display PCB designed in KiCad.
- Size
- 115.7 × 41.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 85
- Nets
- 30
- Pads
- 172
- Tracks, vias
- 406, 51
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 4 Jun 2026
- Updated
- 6 Jun 2026
Overview
7-segment led is an open-source printed circuit board by prashantbhandary, from the prashantbhandary/7-segment-led repository on GitHub. It is a 2-layer board of 115.7 × 41.3 mm with 85 parts on 30 nets, routed with 406 tracks and 51 vias.
It is built around the RS-05K2200FT, KTR10EZPF1001 and BC847. Its parts include 60 diodes, 12 resistors, 4 transistors and 3 connectors.
Main components
3
RS-05K2200FT
0805-55℃~+155℃ 125mW 150V 220Ω Thick Film Resistor ±1% ±100ppm/℃ 0805 Chip Resistor - Surface Mount ROHSGuangdong Fenghua Advanced Tech (FH)Chip Resistor - Surface MountKTR10EZPF1001
0805-55℃~+155℃ 125mW 1kΩ 400V Thick Film Resistor ±1% ±100ppm/℃ 0805 Chip Resistor - Surface Mount ROHSROHM SemiconductorChip Resistor - Surface Mount
BC847
SOT-231 NPN 100MHz 100mA 100nA 110 200mW 45V 500mV 6V NPN SOT-23 Bipolar (BJT) ROHSShikuesBipolar (BJT)
README
README.md7-Segment LED Display
A 4-digit multiplexed 7-segment LED display PCB designed in KiCad.
Preview
| Schematic | PCB Layout | 3D View |
|---|---|---|
 |  |  |
How It Works
4 digits are driven via multiplexing — each digit's common cathode is switched by a BC847 NPN transistor. Segment lines are shared across all digits with 220Ω current-limiting resistors.
Bill of Materials
| Component | Qty | Part |
|---|---|---|
| LEDs (0805) | 60 | LS R976-NR-1 |
| NPN Transistors | 4 | BC847 (SOT-23) |
| Resistors 220Ω (0805) | 8 | RS-05K2200FT |
| Resistors 1KΩ (0805) | 4 | KTR10EZPF1001 |
| Pin Headers | 3 | 10-pin, 4-pin, 2-pin (2.54mm) |
Connectors
| Connector | Pins | Function |
|---|---|---|
| J1 | 10 | Segment lines (SEG_A–H + VCC + GND) |
| J3 | 4 | Digit select (DIG_0–3) |
| J2 | 2 | Power |
Files
*.kicad_sch— schematic*.kicad_pcb— PCB layoutfb1/— Gerber files for fabricationbom/ibom.html— interactive BOM (open in browser)7-segment-led.csv— component list
Tools
- KiCad 7+
Parts
85| Qty | Value | Footprint | References |
|---|---|---|---|
| 60 | LED | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +44 |
| 8 | 220 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5, R6, R7, R8, R9, R10, R11, R12 |
| 4 | 1K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R3, R4 |
| 4 | BC847 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4 |
| 2 | LOGO | electro.preety:prashantbhandari | G***, G*** |
| 1 | Conn_01x02_Pin | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J2 |
| 1 | Conn_01x04_Pin | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J3 |
| 1 | Conn_01x10_Pin | Connector_PinHeader_2.54mm:PinHeader_1x10_P2.54mm_Vertical | J1 |
| 1 | LOGO | electro.preety:electrologov1 | G*** |
| 1 | LOGO | electro.preety:website | G*** |
| 1 | LOGO | electro.preety:electrophobia.tech | G*** |
| 1 | LOGO | electro.preety:electro-phobia | G*** |
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Questions
How big is the 7-segment led PCB?
It measures 115.7 × 41.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the 7-segment led use?
85 parts, built around the RS-05K2200FT, KTR10EZPF1001 and BC847. 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 7-segment led KiCad files?
From the prashantbhandary/7-segment-led repository on GitHub, at the commit this page was made from: the board is 7-segment-led.kicad_pcb and its schematic 7-segment-led.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the 7-segment led design in my own project?
Its repository states no licence, so its author keeps all rights: ask prashantbhandary before reusing the design.