2 layers100 × 90 mm
2 layers24 × 49 mm
- Size
- 24 × 49 mm
- Copper layers
- 2
- Thickness
- 0.8 mm
- Parts
- 18
- Nets
- 9
- Pads
- 37
- Tracks, vias
- 46, 66
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 5 Jul 2023
- Updated
- 27 Oct 2026
Overview
4btn is an open-source printed circuit board by McbeEringi, from the McbeEringi/pcb-stuff repository on GitHub, published under the MIT licence. It is a 2-layer board of 24 × 49 mm with 18 parts on 9 nets, routed with 46 tracks and 66 vias.
It is built around the ATTINY202-SSN, BSS138 and CR2032. Its parts include 5 switches, 3 capacitors, 1 IC, 1 diode and 1 transistor. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
3
ATTINY202-SSN
SOIC-8-40℃~+105℃ 1.8V~5.5V 10bit 128Byte 20MHz 2KB 6 64Byte 8 Bit AVR Built-in FLASH SOIC-8 Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
BSS138
SOT-23-55℃~+150℃ 1 N-channel 1.1Ω@10V、1.2Ω@4.5V 1.2V 1.7nC@10V 17.5pF 340mA 350mW 50V 6.5pF N-Channel SOT-23 MOSFETs ROHShongjiachengMOSFETs
CR2032
-- Unclassified goods ROHSMaxellUncategorised
Parts
18| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 4u7 | Capacitor_SMD:C_0603_1608Metric | C1, C3 |
| 2 | M3 | MountingHole:MountingHole_3.2mm_M3_Pad | H1, H2 |
| 1 | 100u | Capacitor_SMD:C_1206_3216Metric | C2 |
| 1 | ATtiny202-SS | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | BSS138 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | BTN1 | Library:alps-skrg | SW1 |
| 1 | BTN2 | Library:alps-skrg | SW2 |
| 1 | BTN6 | Library:alps-skrg | SW3 |
| 1 | BTN7 | Library:alps-skrg | SW4 |
| 1 | CR2032 | Battery:BatteryHolder_Multicomp_BC-2001_1x2032 | BT1 |
| 1 | GND | TestPoint:TestPoint_Pad_1.5x1.5mm | TP1 |
| 1 | IR_LED | LED_THT:LED_D5.0mm_Horizontal_O1.27mm_Z3.0mm_Clear | D1 |
| 1 | LOGO | Library:mcbeeringi_icon_10mm | |
| 1 | SW_SPDT | Library:IS-1245T-G | SW5 |
| 1 | UPDI | TestPoint:TestPoint_Pad_D1.5mm | TP2 |
| 1 | pcb.6ca.me | Library:pcb.6ca.me_7mm |
Questions
How big is the 4btn PCB?
It measures 24 × 49 mm and has 2 copper layers, 0.8 mm thick.
What parts does the 4btn use?
18 parts, built around the ATTINY202-SSN, BSS138 and CR2032. 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 4btn KiCad files?
From the McbeEringi/pcb-stuff repository on GitHub, at the commit this page was made from: the board is proj/ir_remote/4btn/4btn.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the 4btn design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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