DIY High Current Li-Ion Balancer

Simple 936 analog soldering station

DIY LiFePo4 Balancer

DIY High Voltage Diode

Li–Ion Battery for children's electric car

Powerful 9Ah Battery for Makita Power Tools

DIY 6Ah Powerful Battery for Makita Power Tools

DIY Simple Power Bank

Very Powerful Thyristor Contactor/Regulator

Li-Ion Battery For Children's Electric Car

Simple Magnet Polarity Finder

Nixie Tube Tester

Transistor PWM Motor Speed Controller

DIY Front Panel Of The Washing Machine (Reverse Engineering)

Ni-Cd To Lithium Battery Conversion

DIY Hidden Wiring Finder

ULTRA Low Voltage CONVERTER

DIY VACUUM Tweezers

LED Converter Without Transformers!

Eternal Flashlight In Case Of The Apocalypse

Joule thief - works from 0.2 Volts!

DIY 0000-9999 Random Generator (Randomizer)

Children's modification of the electric car

How to find a short circuit in an electric motor ?

Useful function of conventional CHOKE

Solder Test

DIY Transformer Winding Machine

How To Make a Police Strobe

DIY 12-220V Power Inverter

CV/CC LI-ION Battery charger