Simple Arduino Bioresonance Therapy device - RIFE Machine
https://maker.pro/arduino/projects/simple-arduino-bioresonance-therapy-device-rife-machine
This is device for treating diseases with the help of different frequencies. A set of several frequencies is given for each disease
DIY Simple Arduino EMF (electromagnetic field) Detector
https://maker.pro/arduino/projects/diy-simple-arduino-emf-electromagnetic-field-detector
The emf detector described in this video has a minimal number of components, which means that it is simple to make, and does not require any tuning. It works great right from the first power on.
DIY simple Arduino 24/7 Lightning monitoring system with graph and data logging
https://maker.pro/arduino/projects/diy-simple-arduino-247-lightning-monitoring-system-with-graph-and-data-logging
Simple to build, but powerful system for continuous monitoring of electrical discharges (lightning)
DIY Simple Arduino Metronome
https://maker.pro/arduino/projects/diy-simple-arduino-metronome
This is a simple beginner Arduino project with a great visual effect, but also a very useful tool when learning to play a musical instrument.
DIY Very simple Arduino Metal Detector
https://maker.pro/arduino/projects/diy-very-simple-arduino-metal-detector
Despite its simplicity, it has a relatively good sensitivity and perfect stability during operation
How to Make an Audio Player With Speaker Using the Arduino Uno
https://maker.pro/arduino/projects/arduino-audio-player
Make a simple Arduino audio player that plays .wav files from an SD card in as little as 10 minutes.
Battery Level Monitor Using an Arduino
https://maker.pro/arduino/projects/battery-level-monitor-using-an-arduino
Keep an eye on your battery's charge level with this simple Arduino-based battery level monitor.
Dual Axis Solar Tracker V2.0
https://maker.pro/arduino/projects/dual-axis-solar-tracker-v20
Track the sun in X and Y with this simple Arduino Project
DIY Simple BME280 Arduino Weather Station
https://maker.pro/arduino/projects/diy-simple-bme280-arduino-weather-station
Super simple Weather station containing only two components.