Very simple 433MHz (EU/ASIA) 315 MHz (US) RF jammer for keyless cars theft prevention

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

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

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

This is ultrasonic pest repellent device for bugs based on ATTINY85, resistors and PAM4803 amplifier with set of 40kHz ultrasonic transducers

Digital LED thermometer on ATTINY13 / LM35 and 4-digit TM1637 module for Arduino. Uses LM35 analog themperature sensor (0-100C degrees).

Smart metering of temperature and humidity with reporting via SMS texting / uploading data over GPRS to Thingspeak platform or others

A DIY ATMega16 Development Board For Students - https://bteworkshop.blogspot.com/2021/05/a-diy-atmega16-development-board-for.html

Smart Intercom System

Home Automation with AVR

An automatic temperature & posture controller prototype for hospital beds. My first project using Embedded C and the Atmega328p MCU

Automatic Software Controlled Clock, Jumper-Free, USBasp