This is a single sided PCB design for the "Little Wire - Minimal AVR programmer and more" clone in Fritzing.

What is this? - usbtiny compatable AVR programmer in minimal form factor with all through hole components - Computer controllable (via USB) additional features: - 4 channel digital input / output - ADC with 10 bit resolution - 2 paralel hardware PWM outputs
- SPI interface - I2C interface - Includes onboard serial bootloader for firmware upgrades! - USB to UART converter , by loading an other firmware (CDC-232 port)