This is an atmega328 (arduino compatible) board that uses 3-pin headers (power and ground for each signal pin) enabling the use of very small shields.

See minishields directory for:

• led4pins.sch
• led8pins.sch
• light sensor microshield v3.sch
• rgb_v3.sch
• seg7_minishield.sch
• temp sensor.sch

See gerber preview image for a preview of the top layer of atmega328 miniboard

Board preview made using git hooks from [https://github.com/jnoss/eagle-preview-autogen], fork of [https://github.com/tekdemo/eagle-preview-autogen]