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

A soundchip made out of an ATtiny25/45/85

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

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

LCD Display WH1602 via I2C BUS on USI ATtiny25

Familly of minimalist development boards for AVR microcontrollers.

ATtiny project for a PWM rainbow light

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

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

BMP280 or BME280 connected to ATtiny25 via SPI

A binary keyboard with 2 buttons!

Hardware-based Pulse-Width-Modulation (PWM) on 1 or 2 PINs for AVR ATtiny85-based boards using ATTinyCore up to 500 kHz.

Pater Noster in Morse-code with a gypsum statue

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