OSC Calibrator and High-Voltage Fuse Resetter for 8-Pin ATtinys

ATTiny13/25/45/85: "An Ultra Simple Iambic Keyer with Speed Pot" !

ATtiny programmer board for use ArduinoUNO as ISP

A soundchip made out of an ATtiny25/45/85

A Morse code to logic-level serial converter for ATtiny13A/25/45/85

A cheap PC interface for Brymen BM869s multimeters (hardware+software)

BMP280 or BME280 connected to ATtiny25 via I2C

The Digital Thermometer based on OneWire protocol. Sensor is DS18B20. Display use a 16-bit shift register TM1637.

ATtiny25/45/85 Development Kit

Microcontroller based thermostat for Kegerator build

Firmware for ATtiny25/45/85 to control WS2813 leds strip

LCD Display WH1602 via I2C BUS on USI ATtiny25

Familly of minimalist development boards for AVR microcontrollers.

LCD Display SSD1306 connected via I2C to ATtiny25. Can use either horizontal or vertical placing.

ATtiny project for a PWM rainbow light

BMP280 or BME280 connected to ATtiny25 via SPI

Arduino sketch that turns an ATtiny25/45/85 into a simple I2C PWM generator to control LEDs

A binary keyboard with 2 buttons!

An incredibly low power LED flasher. Runs from a single coin cell for over a year

ATtiny25 firmware replacement design for the MIC502 fan management IC.