4-bit Relay Counter

Voltage Boost Converter Module MT3608

Relay Based FlipFlop

How to wire a transformer as an autotransformer - UTSOURCE

Testing the new Algolaser DIY kit Laser Engraver

Nuclear Radiation Detector (Geiger Tube) Test.

Cordless Screwdriver Set Kaiweets ES20

Electrostatic precipitator

Multi Field Meter (Magnetic Electric and RF measurements)

Rectangular to Sine Wave Converter Circuit - UTSOURCE

Constant Current Source with Op Amp

Magnesium Copper Battery with Vinegar Electrolyte

Diode Clipping circuit

Modding a Step Up Module to Add Potentiometers in Place of Trimpots

DIY Magnesium Copper Battery

High Voltage Flyback Driver with PWM

Strobe Light with LED and PWM Module

Homemade Aluminum Air Battery

DC Motor Speed Control with PWM Module and Mosfet

Hydrogen Production with Aluminum and NAOH

DIY Copper Aluminium Battery - 800 mA

Ajustable PWM Generator Module

Modding the TP4056 to obtain Variable Current

Experiment with Peltier Cell

Low Temperature Stirling Engine from EngineDIY

Charge Modules for Lithium Ion Batteries - TP4056

Marble Machine DIY

Long Lasting Emergency Light with Lithium Battery

Can you get good lithium cells from bad laptop batteries?

What Happens to a Candle Flame in an Electric Field?