2 layers38.6 × 6.6 mm
ArtDecoEarrings
sawaiz/artDecoEarrings
Shimmering electronic earrings in the Art Deco style.
20 parts18
2 layers40 × 12.2 mm
Attiny85 USB
Ontim-Nath02/ATTiny85_USB-Development-PCB_BoardThe design includes: 1. ATTiny85-20M microcontroller 2. USB interface 3. Zener diode protection 4. Status LED 5. ISP programming headers 6. Compact single-board layout
- Size
- 40 × 12.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 12
- Nets
- 23
- Pads
- 53
- Tracks, vias
- 88, 10
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 25 May 2026
- Updated
- 25 May 2026
Overview
Attiny85 USB is an open-source printed circuit board by Ontim-Nath02, from the Ontim-Nath02/ATTiny85_USB-Development-PCB_Board repository on GitHub. It is a 2-layer board of 40 × 12.2 mm with 12 parts on 23 nets, routed with 88 tracks and 10 vias.
It is built around the ATTINY85-20MU. Its parts include 4 resistors, 3 diodes, 2 ICs, 2 connectors and 1 capacitor. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
1README
README.mdATTiny85_USB-Development-PCB_Board
A compact USB-enabled development board based on the ATTiny85 microcontroller. This project was designed in KiCad and supports USB communication using the ATTiny85 with a minimal external component setup.
Project Overview
This board is useful for:
- Learning embedded systems
- USB-based ATTiny85 projects
- Small automation projects
- Compact custom PCB design practice
The design includes:
- ATTiny85-20M microcontroller
- USB interface
- Zener diode protection
- Status LED
- ISP programming headers
- Compact single-board layout
Components Used
- Microcontroller ---> ATTiny85-20M
- Resistors ---> 68Ω, 330Ω, 1.5kΩ
- Capacitor ---> 100nF
- Zener Diodes ---> 3.6V
- LED ---> Standard LED
- USB Connector ---> USB Type-A
- Headers ---> 1x4 Pin Headers
Schematic
PCB Layout
3D View
Software Used
KiCad
Applications
- USB gadgets
- Sensor projects
- Automation systems
- Learning PCB design
- Embedded system practice
Parts
12| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 3V6 | Diode_SMD:D_SOD-123 | D1, D2 |
| 2 | 68R | Resistor_SMD:R_0805_2012Metric | R1, R2 |
| 1 | 100n | Capacitor_SMD:C_1206_3216Metric | C1 |
| 1 | 1k5 | Resistor_SMD:R_0805_2012Metric | R4 |
| 1 | 330R | Resistor_SMD:R_0805_2012Metric | R3 |
| 1 | ATtiny85-20M | Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.6x2.6mm | U1 |
| 1 | Conn_01x04_Pin | Connector_PinHeader_2.00mm:PinHeader_1x04_P2.00mm_Vertical | J2 |
| 1 | Conn_01x04_Pin | Connector_PinHeader_1.00mm:PinHeader_1x04_P1.00mm_Vertical | J1 |
| 1 | LED | LED_THT:LED_D3.0mm | D3 |
| 1 | ~ | USB_Custom_library:Untitled | U2 |
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Questions
How big is the Attiny85 USB PCB?
It measures 40 × 12.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Attiny85 USB use?
12 parts, built around the ATTINY85-20MU. 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 Attiny85 USB KiCad files?
From the Ontim-Nath02/ATTiny85_USB-Development-PCB_Board repository on GitHub, at the commit this page was made from: the board is Attiny85_USB.kicad_pcb and its schematic Attiny85_USB.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Attiny85 USB design in my own project?
Its repository states no licence, so its author keeps all rights: ask Ontim-Nath02 before reusing the design.