2 layers327.9 × 139 mm
Coco2
baldengineer/bit-preserve
Project for capturing vintage, classic, aka old computer schematics in KiCad.
147 parts446
2 layers58 × 43.5 mm
Blinky
hitenpanda/blinkyA led chaser circuit using NE555P and CD4017BE ICs which have a configurable speed using a 100K Ohm variable Trim Pot.
- Size
- 58 × 43.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 18
- Nets
- 18
- Pads
- 57
- Tracks, vias
- 254, 40
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 18 Apr 2026
- Updated
- 18 Apr 2026
Overview
Blinky is an open-source printed circuit board by hitenpanda, from the hitenpanda/blinky repository on GitHub. It is a 2-layer board of 58 × 43.5 mm with 18 parts on 18 nets, routed with 254 tracks and 40 vias.
It is built around the NE555P. Its parts include 10 diodes, 2 capacitors, 2 resistors, 2 ICs and 1 connector.
Main components
1README
README.mdTitle: Blinky Author: Hiten Panda Description: An LED chaser circuit using ICs only. Created at: 2026-04-18
Blinky - An LED chaser circuit using ICs only.
The ICs used are:
| Serial No. | Part Name | Purpose |
|---|---|---|
| 1 | NE555P | It acts as a clock. |
| 2 | CD4017BE | It acts as a counter. |
I was curious to learn about how some ICs work, thought of learning by making one.
Took some screenshot while making the project. It was a fun project to work with ICs and help me understand how do they work.
Parts List:
These are the parts I used for making it:
| Serial No. | Part Name | Quantity |
|---|---|---|
| 1 | 100uF 25V Cap | 1 |
| 2 | NE555P | 1 |
| 3 | CD4017BE | 1 |
| 4 | W104 Trim Pot 100k Ohm | 1 |
| 5 | 1k Ohm Resistor | 1 |
| 6 | 470 Ohm Resistor | 1 |
| 7 | 0.1uF Disc Cap | 1 |
| 8 | Header Pin | 2 |
| 9 | Through-Hole LED | 10 |
Screenshots I took:
In between the schematics process: !between-schematics
After completing schematics: !after-schematics
After completing the PCB: !after-pcb
3D-Render of the PCB: !render
Parts
18| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | LED | LED_THT:LED_D5.0mm | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10 |
| 1 | 0.1uF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C2 |
| 1 | 100k Ohm | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | RV1 |
| 1 | 100uF 25V | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C1 |
| 1 | 1k Ohm | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2 |
| 1 | 4017 | Package_DIP:DIP-16_W7.62mm | U2 |
| 1 | 470 Ohm | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
| 1 | Conn_01x02_Pin | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | NE555P | Package_DIP:DIP-8_W7.62mm | U1 |
Questions
How big is the Blinky PCB?
It measures 58 × 43.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Blinky use?
18 parts, built around the NE555P. 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 Blinky KiCad files?
From the hitenpanda/blinky repository on GitHub, at the commit this page was made from: the board is Hardware/Blinky.kicad_pcb and its schematic Hardware/Blinky.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Blinky design in my own project?
Its repository states no licence, so its author keeps all rights: ask hitenpanda before reusing the design.
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