DIY Simple Alpha Radiation Spark Detector (High Voltage)
https://maker.pro/analog/projects/diy-simple-alpha-radiation-spark-detector-high-voltage
A very simple device that can detect Alpha radiation and the presence of Alpha radiation is manifested by small sparks between electrodes
DIY sensitive Arduino IB Metal Detector with Discrimination
https://maker.pro/arduino/projects/diy-sensitive-arduino-ib-metal-detector-with-discrimination
It can detect metal coin at 15cm +, and bigger metal objects at 50cm and more. Also capable of discriminating between ferrous and nonferrous
DIY Simple Sensitive IB Metal Detector with 2xNE555 IC
https://maker.pro/arduino/projects/diy-simple-sensitive-ib-metal-detector-with-2xne555-ic
A relatively sensitive IB (Induction balance) Metal Detector which is very easy to make, and contains a few standard electronic components
DIY ULTRA-SENSITIVE EMF (Electromagnetic field) Detector
https://maker.pro/arduino/projects/diy-ultra-sensitive-emf-electromagnetic-field-detector
This device can also be called an EMF meter, as it can measure the relative strength of a field using a scale of 10 LEDs.
DIY Super Simple Sensitive Metal Detector
https://maker.pro/analog/projects/diy-super-simple-sensitive-metal-detector
Extremely simple Metal Detector whose making requires only one cheap integrated circuit TL084.
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
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 Drone: How to Build a Quadcopter, Part 1
https://maker.pro/custom/projects/diy-quadcopter-tutorial
Use this comprehensive guide to build and pilot your own quadcopter.
DIY Drone: How to Build a Quadcopter, Part 2
https://maker.pro/custom/projects/diy-quadcopter-tutorial-2
Part two of our comprehensive guide to building and piloting your own quadcopter.