4 layers17.8 × 19 mm
2 layers17.5 × 19.1 mm
Ring pcb IR
whatnick/lantern_ring3Lantern Corps Style Ring, SW/HW/Jewellery Design
- Size
- 17.5 × 19.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 22
- Nets
- 27
- Pads
- 67
- Tracks, vias
- 119, 17
- Pours
- 9
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 14 Nov 2021
- Updated
- 7 Nov 2026
Overview
Ring pcb IR is an open-source printed circuit board by whatnick, from the whatnick/lantern_ring repository on GitHub. It is a 2-layer board of 17.5 × 19.1 mm with 22 parts on 27 nets, routed with 119 tracks and 17 vias.
It is built around the ATTINY85-20MU, 15406094BA500 and BC847BS,115, with the RT0603FRE101KL and RT0603BRD07210RL among its other parts. Its parts include 5 diodes, 3 transistors, 2 capacitors, 2 resistors and 1 IC. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
5
ATTINY85-20MU
QFN-20-EP(4x4)-40℃~+85℃ 10bit 2.7V~5.5V 20MHz 512Byte 512Byte 6 8 Bit 8KB AVR Built-in FLASH QFN-20-EP(4x4) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
15406094BA500
0603-40℃~+85℃ 0.4mW/sr@IF=20mA 1.2V 940nm 0603 Infrared LED Emitters ROHSWürth ElektronikInfrared LED Emitters
BC847BS,115
TSSOP-6(SOT-363)-65℃~+150℃ 100MHz 100mA 15nA 2 NPN 200 300mV 300mW 45V 5V NPN TSSOP-6(SOT-363) Bipolar (BJT) ROHSNexperiaBipolar (BJT)
RT0603FRE101KL
0603-55℃~+155℃ 100mW 1kΩ Thin Film Resistor ±1% ±50ppm/℃ 0603 Chip Resistor - Surface Mount ROHSYAGEOChip Resistor - Surface MountRT0603BRD07210RL
0603-55℃~+155℃ 100mW 210Ω 75V Thin Film Resistor ±0.1% ±25ppm/℃ 0603 Chip Resistor - Surface Mount ROHSYAGEOChip Resistor - Surface Mount
README
hardware/v2.0/ring_mono/README.mdLantern Ring Mono PCB
Production boards use 0.8 mm FR-4, 1 oz copper, and lead-free HASL. Each assembled variant fits the same LED MPN at D1-D6; TP1 and TP2 are copper contacts and are not fitted components.
| Variant | LED MPN | Solder mask | Silkscreen |
|---|---|---|---|
| White / Life | IN-S126ASUW | White | Black |
| UV / Death | SM1206UV-400-IL | Black | White |
| Red / Rage | APTL3216SURCK | Red | White |
| Orange / Avarice | APTL3216SECK-01 | Yellow | Black |
| Yellow / Fear | APTL3216SYCK | Yellow | Black |
| Green / Will | APTD3216MGC | Green | White |
| Blue / Hope | APT3216QBC/D | Blue | White |
| Indigo / Compassion | APTR3216-VFX | Purple | White |
| Pink / Love | APT3216PBC/RV | Purple | White |
| Invisible / Infrared | AP3216F3C | Black | White |
Orange, indigo, pink, and infrared use the closest available PCB colors. Confirm exact LED substitutions and fabrication colors before production.
Parts
22| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | TestPoint | TestPoint:TestPoint_Pad_1.0x1.0mm | TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8, TP9 |
| 5 | LED | LED_SMD:LED_0603_1608Metric | D1, D2, D3, D4, D5 |
| 2 | Q_Dual_NPN_NPN_E1B1C2E2B2C1 | Package_TO_SOT_SMD:SOT-363_SC-70-6 | Q2, Q3 |
| 1 | 100n | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 10u | Capacitor_SMD:C_0603_1608Metric | C2 |
| 1 | 1k | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 200 | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | ATtiny85-20M | Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.6x2.6mm | U2 |
| 1 | Q_PNP_BEC | Package_TO_SOT_SMD:SOT-23 | Q1 |
Questions
How big is the Ring pcb IR PCB?
It measures 17.5 × 19.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Ring pcb IR use?
22 parts, built around the ATTINY85-20MU, 15406094BA500, BC847BS,115 and RT0603FRE101KL. 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 Ring pcb IR KiCad files?
From the whatnick/lantern_ring repository on GitHub, at the commit this page was made from: the board is hardware/v2.0/ring_pcb_IR/ring_pcb_IR.kicad_pcb and its schematic hardware/v1.0/ring_pcb/ring_pcb.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Ring pcb IR design in my own project?
Its repository states no licence, so its author keeps all rights: ask whatnick before reusing the design.
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