2 layers35.6 × 17.8 mm
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mribble/ElectricEelWheel5
The Electric Eel Wheel 5 is an electric spinning wheel that converts fiber (an example being sheep's wool) into yarn. This site contains the open source files for this project.
18 parts14
2 layers54.4 × 26 mm
USBtiny ISP Programmer ATtiny44
abdontroche/FabISP-USBtinyISP-ATtiny446This is a version of the Fab-ISP programmer that is used in the Fab Academy course around the world
- Size
- 54.4 × 26 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 16
- Nets
- 16
- Pads
- 57
- Tracks, vias
- 151, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 6 Jan 2020
- Updated
- 8 Nov 2021
Overview
USBtiny ISP Programmer ATtiny44 is an open-source printed circuit board by abdontroche, from the abdontroche/FabISP-USBtinyISP-ATtiny44 repository on GitHub, published under the MIT licence. It is a 2-layer board of 54.4 × 26 mm with 16 parts on 16 nets, routed with 151 tracks and 0 vias.
It is built around the ATTINY44-20SSU and JUMPER2. Its parts include 7 resistors, 3 capacitors, 2 connectors and 1 IC. It belongs with the interfaces and adapters boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
2README
README.mdFabISP-USBtinyISP-ATtiny44
This is a version of the FabISP programmer that is used in the Fab Academy course around the world based on the board hello.ISP.44.
The FabISP is an in-system programmer for AVR microcontrollers, designed for production within a FabLab. That is, it allows you to program the microcontrollers on other boards you make, using nothing but a USB cable and 6-pin IDC to 6-pin IDC cable. It's based on the USBtiny and V-USB firmwares, which allow the ATtiny44 to perform USB communication in software. Programming can be done through avrdude.
This version was made using the software KiCad version 5.1.2
Schematic
BOM
| Item | Qty | Reference(s) | Value | LibPart | Footprint | Datasheet | Category |
|---|---|---|---|---|---|---|---|
| 1 | 1 | C1 | 1uF | SparkFun-Capacitors:1.0UF-1206-50V-10% | 1206 | ||
| 2 | 2 | C2, C3 | 10pF | SparkFun-Capacitors:1.0UF-1206-50V-10% | 1206 | ||
| 3 | 1 | J3 | 690-005-299-043 | dk_USB-DVI-HDMI-Connectors:690-005-299-043 | digikey-footprints:USB_Mini_B_Female_690-005-299-043 | http://files.edac.net/690-005-299-043.pdf | Connectors, Interconnects |
| 4 | 1 | J4 | ISP-CONNECTOR | SparkFun-Connectors:CONN_03X2FEMALE_SMD | 2X3_SMD | ||
| 5 | 2 | R2, R3 | 100 | SparkFun-Resistors:10OHM-1206-1_4W-1% | 1206 | ||
| 6 | 1 | R4 | 1k | SparkFun-Resistors:10OHM-1206-1_4W-1% | 1206 | ||
| 7 | 1 | R5 | 499 | SparkFun-Resistors:10OHM-1206-1_4W-1% | 1206 | ||
| 8 | 1 | R6 | JUMPER1 | SparkFun-Resistors:10OHM-1206-1_4W-1% | 1206 | ||
| 9 | 1 | R8 | 10k | SparkFun-Resistors:10OHM-1206-1_4W-1% | 1206 | ||
| 10 | 1 | R9 | JUMPER2 | SparkFun-Resistors:10OHM-1206-1_4W-1% | 1206 | ||
| 11 | 1 | U2 | ATtiny44-20SSU | MCU_Microchip_ATtiny:ATtiny44-20SSU | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | http://ww1.microchip.com/downloads/en/DeviceDoc/doc8006.pdf | |
| 12 | 1 | XTAL1 | ECS-_327-12_5-34B-TR | dk_Crystals:ECS-_327-12_5-34B-TR | digikey-footprints:SMD-2_3.2x1.5mm | http://www.ecsxtal.com/store/pdf/ecx-31b.pdf | Crystals, Oscillators, Resonators |
| 13 | 2 | Z1, Z2 | 3V3 | dk_Diodes-Zener-Single:MMSZ5231B-7-F | digikey-footprints:SOD-123 | https://www.diodes.com/assets/Datasheets/ds18010.pdf | Discrete Semiconductor Products |
Interactive BOM
This tool can help you during the soldering process. It is a HTML file called ibom.html
Board Layout
Fabrication Files
3D view
Programming Instructions
The instructions to program the board is this website or in a PDF file here
To download the firmware you can go here or download from here
The toolchain for programming you can download from:
Usage
Once you programmed your FabISP you want to try if it works, so, if you are using Microsoft Windows you will need a driver.
Parts
16| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 100 | Capacitors:1206 | R2, R3 |
| 2 | 10pF | Capacitors:1206 | C2, C3 |
| 2 | 3V3 | digikey-footprints:SOD-123 | Z1, Z2 |
| 1 | 10k | Capacitors:1206 | R8 |
| 1 | 1k | Capacitors:1206 | R4 |
| 1 | 1uF | Capacitors:1206 | C1 |
| 1 | 499 | Capacitors:1206 | R5 |
| 1 | 690-005-299-043 | digikey-footprints:USB_Mini_B_Female_690-005-299-043 | J3 |
| 1 | ATtiny44-20SSU | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U2 |
| 1 | ECS-_327-12_5-34B-TR | digikey-footprints:SMD-2_3.2x1.5mm | XTAL1 |
| 1 | ISP-CONNECTOR | Connectors:2X3_SMD | J4 |
| 1 | JUMPER1 | Capacitors:1206 | R6 |
| 1 | JUMPER2 | Capacitors:1206 | R9 |
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Questions
How big is the USBtiny ISP Programmer ATtiny44 PCB?
It measures 54.4 × 26 mm and has 2 copper layers, 1.6 mm thick.
What parts does the USBtiny ISP Programmer ATtiny44 use?
16 parts, built around the ATTINY44-20SSU and JUMPER2. 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 USBtiny ISP Programmer ATtiny44 KiCad files?
From the abdontroche/FabISP-USBtinyISP-ATtiny44 repository on GitHub, at the commit this page was made from: the board is USBtiny-ISP-Programmer-ATtiny44/USBtiny-ISP-Programmer-ATtiny44.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the USBtiny ISP Programmer ATtiny44 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).