How to Make a Battery Protection Circuit (over-discharge protection)

Powering homemade projects with rechargeable batteries is actually more difficult than it sounds. This is because most battery types cannot be over-discharged, as doing so may damage the battery and make it unstable. Consumer electronics overcome this issue by using clever battery protection circuitry that constantly monitors the battery’s voltage, automatically switching the device off […]

How to Make a Shunt Current Sense Resistor

Hi, I want to make a *beep* I said shunt! I want to make a *shunt* current sense resistor. Basically the way we measure current is by converting it into voltage passing it through a known resistor which we call a shunt and so the current is the measured voltage divided by the known resistance. […]

How to protect circuits from reversed voltage polarity!

In this video I’m going to show you a couple of ways to protect your circuits from backwards power connections. Let’s say you have a 12 volt power source like a battery and you want to power something. It doesn’t matter what it is. Let’s say it draws 2 amperes. When the battery is connected […]

Why 3 Phase AC instead of Single Phase???

Hi. In my last video, I talked about how Tesla won the AC-DC battle against Edison. But then he shoved three-phase AC down our throats instead of single-phase AC. Edison: “Oh no, he didn’t. He always asked for too much” Ah, get lost Eddy! Obviously Tesla had a good reason. What is a three-phase AC? […]

HOW to make an arc welding machine using the toroidal transformer of an amplifier, Power core

Hello all of you. Today I go back to the topic of power supplies for amplifiers and electric arc welding machines. That is the power supply for the high power amplifier that I made in the previous video. Use toroidal transformer to make arc welding machine. It is a toroidal transformer. I removed this toroidal […]

Why Use AC Instead of DC at Home??

Hi. Why do we ever use AC to power homes instead of DC? Haven’t I showed you that AC is typically more dangerous than DC? [Painful Gurgle] Can we run everything on DC? Yes! In fact pretty much every device at home has to rectify AC into DC first before it can use it so […]

Battery Spot Welder (CD Welder) || DIY or Buy

In a previous project video I showed you how to create a battery pack out of 18650 lithium ion batteries. Back, then I utilized a rather riskier and not recommended methods of connecting the battery cells together. By soldering the nickel strips directly to them. This can be dangerous because you heat up the battery […]

Transistor / MOSFET tutorial

In this tutorial I’m going to go over the basics of a popular transistor and show you how you can use it to control different gadgets. What is a transistor? A transistor is a device that allows you to use small changes in voltage to switch things on and off. They are kind of like […]

Inductor basics – What is an inductor?

Welcome to my first video about inductors. So, what is an inductor? Generally speaking an inductor is a device that temporarily stores energy in the form of a magnetic field. Inductors are usually just coils of wire and one of the basic properties of electromagnetism is that when you have current flowing through a wire, […]

Power supply from an electronic transformer

Hi friends! Imagine the situation then you urgently need a small power supply, for example, to power a 12 Volt load, no more than 30 Watts , but at hand, there is neither a network transformer nor a corresponding impulse power supply. The radio amateur in such a situation will collect a simple impulse power […]