4 layers
IONPAK2
m-labs/ionpak
A modern, low-cost universal controller for hot-cathode ionization vacuum gauges. (WIP)
259 parts23
2 layers79.3 × 57.9 mm
Butterfly
quetchen/butterflyButterflies and Rainbows
- Size
- 79.3 × 57.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 47
- Nets
- 32
- Pads
- 201
- Tracks, vias
- 459, 27
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 1 Jun 2025
- Updated
- 1 Jun 2025
Overview
Butterfly is an open-source printed circuit board by quetchen, from the quetchen/butterfly repository on GitHub. It is a 2-layer board of 79.3 × 57.9 mm with 47 parts on 32 nets, routed with 459 tracks and 27 vias.
It is built around the ATTINY85-20SU, 1N4148W and DMN3404L. Its parts include 22 diodes, 8 capacitors, 7 resistors, 3 connectors and 2 ICs. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
3
ATTINY85-20SU
SOIC-8-208mil-40℃~+85℃ 10bit 2.7V~5.5V 20MHz 512Byte 512Byte 6 8 Bit 8KB AVR Built-in FLASH SOIC-8-208mil Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching Diodes
DMN3404L
SOT-23-55℃~+150℃ 1 N-channel 1V 29pF 305pF 30V 38mΩ@10V 3nC 5A 65pF 750mW N-Channel ±20V SOT-23 MOSFETs ROHSYTLMOSFETs
README
README.mdbutterfly
Rainbows & Butterflies
Parts
47| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 4691 | 4691_butterfly:4691_handsolder | D2, D3, D4, D5, D6, D7, D8, D9, D10, D11 |
| 10 | NeoPixel_THT | neopixel:LED_D5.0mm-4_RGB | D13, D14, D15, D16, D17, D18, D19, D20, D21, D22 |
| 4 | 0.1u | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C4, C6, C8 |
| 4 | 10u | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C2, C3, C5, C7 |
| 2 | 1K | butterfly:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal_nosilk | R3, R4 |
| 2 | 330 | butterfly:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal_nosilk | R2, R5 |
| 2 | Omron B3FS | Button_Switch_SMD:SW_SPST_Omron_B3FS-100xP | SW1, SW2 |
| 1 | 10K | butterfly:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal_nosilk | R6 |
| 1 | 150mA | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | F1 |
| 1 | 1N4148W | Diode_SMD:D_MiniMELF | D12 |
| 1 | 4.7K | butterfly:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal_nosilk | R1 |
| 1 | ATtiny85-20S | Package_SO:SOIC-8_5.3x5.3mm_P1.27mm | U1 |
| 1 | AVR-ISP-6 | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J1 |
| 1 | DMN3404L | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | JST_2mm_LiPo | SparkFun-Connector:JST_SMD_2.0mm-2 | J2 |
| 1 | LED | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1 |
| 1 | LOGO | wombatula:wombatula | G*** |
| 1 | MCP73831-2-OT | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | R_Photo | OptoDevice:R_LDR_4.9x4.2mm_P2.54mm_Vertical | R7 |
| 1 | USB_B_Micro | Connector_USB:USB_Micro-B_Amphenol_10118193-0001LF_Horizontal | J3 |
Questions
How big is the Butterfly PCB?
It measures 79.3 × 57.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Butterfly use?
47 parts, built around the ATTINY85-20SU, 1N4148W and DMN3404L. 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 Butterfly KiCad files?
From the quetchen/butterfly repository on GitHub, at the commit this page was made from: the board is hardware/butterfly.kicad_pcb and its schematic hardware/butterfly.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Butterfly design in my own project?
Its repository states no licence, so its author keeps all rights: ask quetchen before reusing the design.
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