2 layers100 × 90 mm
2 layers18 × 10 mm
- Size
- 18 × 10 mm
- Copper layers
- 2
- Thickness
- 1 mm
- Parts
- 13
- Nets
- 15
- Pads
- 61
- Tracks, vias
- 89, 13
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 5 Jul 2023
- Updated
- 27 Oct 2026
Overview
T85 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 18 × 10 mm with 13 parts on 15 nets, routed with 89 tracks and 13 vias.
It is built around the ATTINY85-20SU. Its parts include 6 resistors, 2 diodes, 2 connectors, 1 capacitor and 1 IC. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
1Parts
13| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 100 | Resistor_SMD:R_0603_1608Metric | R2, R3 |
| 2 | 5k1 | Resistor_SMD:R_0603_1608Metric | R5, R6 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 1k5 | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 4u7 | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | ATtiny85-20S | Package_SO:SOIC-8_5.3x5.3mm_P1.27mm | U1 |
| 1 | BZB784-Cxx | Package_TO_SOT_SMD:SOT-323_SC-70 | D4 |
| 1 | LED | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | OUT | Package_DIP:DIP-8_W7.62mm_Socket | J2 |
| 1 | SW_Push | Library:alps-skrp | SW1 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J1 |
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Questions
How big is the T85 PCB?
It measures 18 × 10 mm and has 2 copper layers, 1 mm thick.
What parts does the T85 use?
13 parts, built around the ATTINY85-20SU. 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 T85 KiCad files?
From the McbeEringi/pcb-stuff repository on GitHub, at the commit this page was made from: the board is proj/avr/t85/t85.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the T85 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).