Franzininho Tiny Board
The Franzininho Tiny follows up on the excellent work of the Franzininho DIY. In many applications soldering is not viable, so there were frequent requests for pre-assembled Franzininho DIY boards — which was never the purpose of the DIY format.
To address this, we chose a microcontroller that maintains compatibility with the Franzininho DIY but offers more pins and comes in an SMD package.
The Franzininho Tiny has a breadboard-compatible form factor and comes fully assembled and ready to program:

Feature summary
- Microcontroller: ATtiny841
- I/O pins: up to 11 (some are shared with USB)
- Analog inputs: up to 9
- PWM: 4
- I2C: 1
- SPI: 1
- UART: 1
- Operating voltage: 5 V
- Power supply: USB (5 V) or external (7.5 V to 9 V)
Documentation
Open hardware project
Like the Franzininho DIY, the Franzininho Tiny is published as an open hardware project under the CERN Open Hardware Licence — a license better suited for hardware projects.
As defined in the license "how to", the project repository includes the following files:
- LICENSE.TXT
- cern_ohl_v_1_2_howto.pdf
- CHANGES.TXT
- COPYRIGHT.TXT
- PRODUCT.TXT
Before reproducing or creating derivatives of this project, review the license requirements, copyright notices, and best practices.
Where to buy
Contact us: contato@franzininho.com.br