simple arduino DC/DC buck converter

Has Arduino selected wrong lock bits for 328Ps ?

arduino attiny45 fan pwm controller

Programming Arduino Due or MKR1000 with Atmel Studio ASF

Multiple serial devices need interface!

Multiple devices on RS232 / serial line

Multiple encoders with ATmega

Hacking touchpads

Trouble with FT232

Transistor tester

ATtiny13 dice

the f1rst one