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)

Familly of minimalist development boards for AVR microcontrollers.

LCD Display WH1602 via I2C BUS on USI ATtiny25

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

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

BMP280 or BME280 connected to ATtiny25 via SPI

ATtiny project for a PWM rainbow light

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.

The TinyQED is an ATTiny45 based widget that counts the pulses from a quadrature encoder and makes them available via I2C.

Pater Noster in Morse-code with a gypsum statue