2 layers40 × 96.1 mm
Cable bunny
HeyPCB/cable-bunny
Cable Bunny: Is it a charge-only cable? Ask the bunny. KiCad 10, heypcb.ai merch.
25 partsCERN-OHL-S-2.0
2 layers63.2 × 85 mm
Badge blob
HeyPCB/badge-blobBlob, the social battery badge: The name badge that tells people whether to come say hi. KiCad 10, heypcb.ai merch.
- Size
- 63.2 × 85 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 18
- Nets
- 13
- Pads
- 42
- Tracks, vias
- 123, 21
- Pours
- 11
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 5 Oct 2026
- Updated
- 5 Oct 2026
Overview
Badge blob is an open-source printed circuit board by HeyPCB, from the HeyPCB/badge-blob repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 2-layer board of 63.2 × 85 mm with 18 parts on 13 nets, routed with 123 tracks and 21 vias.
It is built around the ATTINY412-SSN, KT-0603R and CC0603KRX7R9BB104, with the CL21A106KAYNNNE, 3034TR and TS-1187A-B-A-B among its other parts. Its parts include 5 resistors, 5 diodes, 2 capacitors, 1 IC and 1 switch. It belongs with the lEDs and displays and power boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
7
ATTINY412-SSN
SOIC-8-40℃~+105℃ 1.8V~5.5V 10bit 128Byte 20MHz 256Byte 4KB 6 8 Bit 8bit AVR Built-in FLASH SOIC-8 Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
KT-0603R
0603-40℃~+85℃ 1.6mm x 0.8mm square LED 1.8V~2.4V 120° 20mA 300mcd 40mW 615nm~630nm 645nm Discrete Diode Red Water Clear 0603 LED Indication - Discrete ROHSHubei KENTO ElecLED Indication - Discrete
CC0603KRX7R9BB104
0603100nF 50V X7R ±10% 0603 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSYAGEOMultilayer Ceramic Capacitors MLCC - SMD/SMT
CL21A106KAYNNNE
080510uF 25V X5R ±10% 0805 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
3034TR
-- Battery Snap ROHSKeystone ElectronicsBatteryConnector
TS-1187A-B-A-B
SMD-4P,5.1x5.1mm-30℃~+85℃ 1.5mm 1.6N 100,000 cycles 12V 5.1mm 5.1mm 50mA Gold No Round Button SPST Surface Mount,Vertical Without Bracket SMD-4P,5.1x5.1mm Tactile Switches ROHSXKB ConnectionTactile SwitchesKT-0603Y
0603-40℃~+85℃ 120° 175mcd 2.4V 40mW 584nm~594nm 596nm Discrete Diode Water Clear Yellow 0603 LED Indication - Discrete ROHSHubei KENTO ElecLED Indication - Discrete
README
README.mdBlob, the social battery badge
The name badge that tells people whether to come say hi.
Blob is a blue blob-shaped name badge with a white panel for your name in marker and a gold "social battery" on its belly. Boop its mouth (the button) to set the battery: green says come say hi, yellow says happy to chat briefly, red says recharging. The chosen LED flashes every few seconds; hold the mouth and its red cheeks blush and the bars wave. An ATtiny412 sleeps in power-down between ticks, so a CR2032 lasts about 11 months of 40-hour weeks, and it switches itself off after 10 hours without a boop. A lanyard slot on top.
| Layers | Size | Parts | Nets | Connections routed | Vias | ERC errors | DRC errors / unconnected / parity | BOM @100 |
|---|---|---|---|---|---|---|---|---|
| 2 | 63.3 x 85.1 mm | 15 (+3 pads) | 13 | 29 -> 0 open | 21 | 0 | 0 / 0 / 0 | $1.15 |
Not fabricated, assembled or powered yet. Every number on this page is measured by KiCad 10.0.6 on
the files in this repository (report.json, measured.json) or read
from the live JLC/LCSC catalogue (bom_cost.json).
| Spec, power budget, BOM | SPEC.md |
| Store copy | STORE_COPY.md |
| KiCad 10 project | kicad/ |
| Gerbers, drill, BOM, CPL, STEP, schematic PDF | fab/ |
| Firmware | firmware/ |
| Renders | front, back, hero, Circuit World thumbnail |
| Brief and generator | design/ |
What's on it
- Name: a 50 x 14 mm white silk panel under "hello, I'm"; permanent marker on, isopropyl alcohol off.
- Social battery: three LEDs in a gold battery outline: green (an InGaN die on 47 ohm, so a 3 V cell drives it), yellow, red; a 40 ms flash every 2.5 s.
- Mouth: TS-1187A button on PA6 (wakes power-down): boop = next level, hold = blush and wave.
- Cheeks: two red LEDs in gold rings.
- Power: one CR2032 in a Keystone 3034 holder; about 90 uA with a level set, 1.5 uA off (see SPEC.md).
Finish
Blue solder mask, White silkscreen, ENIG copper finish, 1.6 mm FR4, top-side SMT assembly. The gold art is bare copper under a mask opening (ENIG), drawn with its own keep-out so no track runs under it. The QR code on the back opens https://heypcb.ai/world/b/c0d18f4323d0.
How it was made
Designed with the HeyPCB method on KiCad 10.0.6, headless, by the heypcb-kicad pipeline: a written
brief composed from reusable circuit blocks, every pin from KiCad's own symbol library, every part bound
to an LCSC number from a dated catalogue read, then ERC, a netlist round trip, locked placement,
Freerouting 2.4.1, pours, silkscreen and board art, DRC with schematic parity, DFM and a fab gate,
each stage gated by a measurement. design/make_brief.py regenerates the brief (outline, part
locks and art) from code.
Part of the heypcb.ai merch collection.
License
Hardware: CERN-OHL-S v2. Firmware: MIT (see firmware/LICENSE). KiCad's symbol, footprint and 3D
libraries used in the design are CC-BY-SA 4.0 with the KiCad library exception.
Parts
18| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | Red | LED_SMD:LED_0603_1608Metric | D1, D2, D3 |
| 2 | 220 | Resistor_SMD:R_0603_1608Metric | R3, R4 |
| 2 | 330 | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 1 | 100nF | Capacitor_SMD:C_0603_1608Metric | C2 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C1 |
| 1 | 47 | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | ATtiny412 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | CR2032 | Battery:BatteryHolder_Keystone_3034_1x20mm | BT1 |
| 1 | GND | TestPoint:TestPoint_Pad_1.0x1.0mm | TP3 |
| 1 | Green | LED_SMD:LED_0603_1608Metric | D5 |
| 1 | TS-1187A | Button_Switch_SMD:SW_Push_1P1T_XKB_TS-1187A | SW1 |
| 1 | UPDI | TestPoint:TestPoint_Pad_1.0x1.0mm | TP2 |
| 1 | VCC | TestPoint:TestPoint_Pad_1.0x1.0mm | TP1 |
| 1 | Yellow | LED_SMD:LED_0603_1608Metric | D4 |
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Questions
How big is the Badge blob PCB?
It measures 63.2 × 85 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Badge blob use?
18 parts, built around the ATTINY412-SSN, KT-0603R, CC0603KRX7R9BB104 and CL21A106KAYNNNE. 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 Badge blob KiCad files?
From the HeyPCB/badge-blob repository on GitHub, at the commit this page was made from: the board is kicad/badge_blob.kicad_pcb and its schematic kicad/badge_blob.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Badge blob design in my own project?
Its repository publishes it under the CERN-OHL-S-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).