Arduino hardware package for ATmega8, ATmega48, ATmega88, ATmega168, ATmega328 and ATmega328PB

A high speed stepper library for Atmega 168/328p (nano), Atmega32u4, Atmega 2560, ESP32, ESP32S2, ESP32S3, ESP32C3, ESP32C6 and Atmel SAM Due

Electronic Lead Screw for metal lathe

Example of using CC1101 module with Arduino Pro Micro ( ATMEGA32U4 ) for radio jamming

SparkFun's Arduino Pro Mini 328 is a bare bones super small Arduino compatible development board.

A small hardware device for transmitting WSPR messages based on the SI5351 IC which uses GPS for transmission time synchronization and automatic QTH locator calculation.

Electronic Modules

DIY GPS GSM vehicle tracker based on SIM808 module and ATMEGA328P

This is simple GPS vehicle tracker base on SIMCOM SIM7000E/G/A module. Works for GSM/LTE-M networks around the globe

An example of proper and most advanced way to put ANY AVR Arduino boards in to sleep

Erriez MH-Z19B and MH-Z19C CO2 sensor library for Arduino

DS3213 high precision RTC (Real Time Clock) library for Arduino

the cheapest GPS tracker / GPS locator based on AVR ATTINY2313/4313 or ATMEGA328 (ARDUINO) and SIM800L GSM module

Simple AVR (ATmega328) Bootloader Tutorial

Simple packet radio on ATMEGA328p (arduino) and CC1101 chip - PC to PC communicator

Calibration of the internal RC oscillator of atmega328p chip, and UART bootloader(ATmegaBOOT) without crystal.

Atmega328 Bootloader for wireless (OTA) code updates, using the CC1101 RF chip.

A Flight Controller board for a quadcopter based on YMFC Joop Brokking's code.

Ravenna Ultra-Low-Altitude Operating System: An embedded OS for AVR and ARM CPUs

For programming a stand-alone ATmega328 or ATmega168.