Category: Beginner Tutorials

Basic electricity amps

Basic Electricity – What is an amp?

The first part in a series of videos about the basics of electricity.

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Basic Electricity – What is voltage?

What is voltage and what does it do? Learn about volts, coulombs, joules, power supplies and more in this video! Adjustable power supply

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LED tutorial

LED Basics

A tutorial on the basics of using LEDs (light emitting diodes). Polarity, forward voltage and current are discussed. 300 LEDs for $13 500 resistors for $12 Adjustable power supply

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Resistance and Ohm's law

Basic Electricity – Resistance and Ohm’s law

A tutorial on the basics of resistance, resistors, and Ohm’s law which describes the relationship between voltage, current and resistance. I also show you how to build a simple resistor + LED circuit. 300 LEDs for $13 500 resistors for $12 9V battery clips Adjustable power supply Ohmnilabs

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Multimeter tutorial

Multimeter tutorial – How to use a multimeter

Everyone who knows anything about electricity will have heard of multimeters. They allow you to measure voltage, current, resistance and more. In this video I show you how to buy a multimeter and how to use it without killing yourself (always a plus). Update: The multimeter shown in the video is no longer available. Here […]

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Power watts

Basic Electricity – Power and watts

A tutorial on electrical power and watts. A practical example of light bulb power measurement is shown as well as a demo how to calculate appropriate resistor sizes.

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It's not the volts it's the amps

“It’s not the volts that kill you, it’s the amps!”

Afroman debunks the popular myth that it’s not the volts that kill you, it’s the amps. Basically, the volts directly determine the current flowing through your body, so the phrase is stupid and dangerously misleading.

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Transistor / MOSFET

Transistor / MOSFET tutorial

How to use an N channel MOSFET to turn anything on and off. Also, remember to put a 100k resistor between gate and ground if you want your FET to stay off by default!

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capacitor replacement

Capacitor replacement tutorial

You may have heard about infamous capacitor plague problem, where crappily manufactured capacitors died prematurely on people’s motherboards. Even if the capacitor was properly made, they still only have a finite lifespan, typically 10,000-100,000 hours. After this, you need to replace the caps or replace the whole board. This video shows you what to do! […]

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What is an Oscilloscope? Oscilloscope tutorials for beginners

An oscilloscope is the most important piece of electronic test equipment you can buy after a multimeter. The first video shows you where you how to choose an oscilloscope. The second two videos show you how to use it.

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voltage divider

Voltage divider tutorial

You can use voltage dividers to generate reference voltages, control audio volume, power low powered devices from specific voltages and much more. This video shows you practical voltage divider design issues and shows you the relevant equations.

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electrical transformer

What is a Transformer? An Electrical Transformer Tutorial

Afroman covers the basics of how transformers work, where to shop for step down mains transformers, and how to wire one up to mains voltages without killing yourself. European and North American wiring is discussed. He finishes up with a quick example of AC to DC conversion in an unregulated dual rail power supply. Remember […]

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Diode tutorial and AC to DC conversion

This video covers the basics of diodes, bridge rectifiers, and how to build simple unregulated AC to DC power supplies than can handle a few mA up to several Amps. I recommend watching my transformer tutorial first if you are confused about where I am getting the AC voltages from. The voltage regulator tutorial is […]

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voltage regulator

Voltage regulator tutorial and USB gadget charger circuit

This video covers the basics of linear voltage regulators – what they do, how to wire them up, and where to find them. Then I give a basic example of how to build a 5V supply that can be used to power USB powered gadgets. This video builds upon material covered in the transformer and […]

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op amp

What is an op amp? Operational Amplifier tutorial & super spy microphone circuit

Ever since the best decade of all time, the 1970s, people have been able to buy amplifiers in all-in-one chips rather than having to make them out of lots of discrete transistors. This video shows you the basics of op amps and has an example circuit where you build an amplifier to take a tiny […]

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