2 layers327.9 × 139 mm
Coco2
baldengineer/bit-preserve
Project for capturing vintage, classic, aka old computer schematics in KiCad.
147 parts446
2 layers
Blinky
Sadrita404/Blinky-LedI built a simple LED Blinker device that makes a light flash on and off automatically. While many people start these projects on a plastic plug-in board, I took mine a step further by designing and making a custom Printed Circuit Board (PCB). This makes the project much more durable, compact, and professional-looking. It’s a great example of a basi
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 22
- Nets
- 18
- Pads
- 61
- Tracks, vias
- 137, 0
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 18 Apr 2026
- Updated
- 19 Apr 2026
Overview
Blinky is an open-source printed circuit board by Sadrita404, from the Sadrita404/Blinky-Led repository on GitHub. It is a 2-layer board with 22 parts on 18 nets, routed with 137 tracks and 0 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.md| Title | Blinky |
|---|---|
| Author | Sadrita Neogi |
| Description | An LED chaser circuit using ICs only. |
| Created at | 2026-04-18 |
Blinky-Led
I built a simple LED Blinker device that makes a light flash on and off automatically. While many people start these projects on a plastic plug-in board, I took mine a step further by designing and making a custom Printed Circuit Board (PCB). This makes the project much more durable, compact, and professional-looking. It’s a great example of a basic timing circuit put into a permanent, finished form.
| Serial No. | Part Name | Purpose |
|---|---|---|
| 1 | NE555P | It acts as a clock. |
| 2 | CD4017BE | It acts as a counter. |
Hours spent on this project - 1.5 hr
Components Required :
Bill of Materials (BOM)
| Item | Description | Quantity | Unit Price (Rs) | Vendor | Purpose |
|---|---|---|---|---|---|
| 1k Ohm Resistor | Pack of 10 | 1 | 12 | Robocraze | Blinky Parts |
| 470 Ohm Resistor | Pack of 10 | 1 | 12 | Robocraze | Blinky Parts |
| 100K Trimpot | Pack of 5 | 1 | 45 | Robocraze | Blinky Parts |
| Male Berg Strip | 40x1 Pin 2.54mm | 2 | 6 | Robocraze | Blinky Parts |
| 5mm Green LED | Pack of 10 | 1 | 15 | Robocraze | Blinky Parts |
| 5mm Blue LED | Pack of 10 | 1 | 11 | Robocraze | Blinky Parts |
| 5mm Red LED | Pack of 10 (Diffused) | 1 | 11 | Robocraze | Blinky Parts |
| LM7805 IC | Voltage Regulator | 2 | 16 | Robocraze | Blinky Parts |
| 0.1uF Capacitor | 50V Ceramic (Pack of 10) | 1 | 17 | Robocraze | Blinky Parts |
| 100uF Capacitor | 25V Electrolytic (Pack of 5) | 1 | 23 | Robocraze | Blinky Parts |
| 555 Timer IC | Single | 2 | 8 | Robocraze | Blinky Parts |
| CD4017 IC | Decade Counter | 2 | 13 | Robocraze | Blinky Parts |
Screenshot, I took in between the process
Under Hack Club
Parts
22| 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_D4.7mm_W2.5mm_P5.00mm | C2 |
| 1 | 100uF | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C1 |
| 1 | 4017 | Package_DIP:DIP-16_W7.62mm_LongPads | U1 |
| 1 | 470 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2 |
| 1 | Conn_01x02_Pin | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | J1 |
| 1 | NE555P | Package_DIP:DIP-8_W7.62mm_LongPads | U2 |
| 1 | R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
| 1 | R_Potentiometer | Potentiometer_THT:Potentiometer_Vishay_T93YA_Vertical | RV1 |
The 18 most common of 22 parts.
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Questions
What parts does the Blinky use?
22 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 Sadrita404/Blinky-Led repository on GitHub, at the commit this page was made from: the board is Blinky/Blinky.kicad_pcb and its schematic Blinky/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 Sadrita404 before reusing the design.