BlinkingHeart
About the BlinkingHeart PCB
BlinkingHeart is an open source PCB design by AboKafta, published on GitHub. It is a 2-layer board measuring 115.3 × 91 mm, with 34 components from 8 distinct parts.
Other key parts include the ICM7555xP. By type, the board carries 16 resistors, 14 diodes, 1 IC, 1 battery holder, 1 switch and 1 capacitor.
From the project
A simple prototype was first made during the summer of 2025 as a gift for my girlfriend. After looking up some tutorials and many hours, I got a simple prototype. I tumbled into some problems such as putting footprints, design errors, and generating a BoM. After using JLCPCB, thi
A simple prototype was first made during the summer of 2025 as a gift for my girlfriend. After looking up some tutorials and many hours, I got a simple prototype. I tumbled into some problems such as putting footprints, design errors, and generating a BoM. After using JLCPCB, this is how it was supposed to look. However, after seeing how much it would cost and if it would even work, I didn't continue to manufacture it. A lot of steps were missed in the process (correct factory specifications, wrong gerber file, etc…) and contained a variety of through-hole and SMD parts.
Main components on the BlinkingHeart
BlinkingHeart bill of materials (BOM)
34 components, 8 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ICM7555xP | DIP254P762X533-8 | U1 |
| 1 | BS-3 | BAT_BS-3 | BT3 |
| 1 | SW_SPDT | SW_100SP1T1B4M2QE | SW1 |
| 14 | LED | LED_D5.0mm_Clear | D1, D2, D3, D4, D5, D6, D7, D8 +6 |
| 1 | 1 uF | CAP_FG28_TDK | C1 |
| 1 | 1k | STA_CF14_STP | R1 |
| 1 | PDB12-H4301-105BF | POT_PDB12-H_301_BRN | R2 |
| 14 | 100 | RESAD730W45L370D210 | R3, R4, R5, R6, R7, R8, R9, R10 +6 |
BlinkingHeart design files
The KiCad project lives in the AboKafta/BlinkingHeartPCB repository on GitHub; these links point at the commit this page was built from.
- LayoutblinkingHeart.kicad_pcb
- SchematicblinkingHeart.kicad_sch
BlinkingHeart: common questions
How big is the BlinkingHeart PCB?
The BlinkingHeart measures 115.3 × 91 mm, has 2 copper layers and is 1.600198 mm thick.
How many components are on the BlinkingHeart?
34 components, from 8 distinct parts. The full bill of materials is listed on this page.
Where can I download the BlinkingHeart design files?
From the AboKafta/BlinkingHeartPCB repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the BlinkingHeart design in my own project?
The repository has no license, so all rights stay with AboKafta. Use it as a reference, and ask the author before reusing the design.