Category: Tutorial videos

Arduino tutorial

You can learn Arduino in 15 minutes

The ultimate Arduino microcontroller tutorial for beginners. Learn what Arduino is, how to choose an Arduino, then build a simple data logger, LED dimmer and motor speed controller. Sponsored by Audible – Get a free 30 day trial & download one free title Example UNO kit Example UNO robot kit

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LM386 amplifier

How to make a simple 1 watt audio amplifier (LM386 based)

A tutorial on how to use the popular LM386 class AB audio amplifier IC to build a simple mono 1 watt audio amplifier. It costs less than $3 in parts! There is also a brief discussion of how to use high pass filters to prevent op-amp oscillation and subsequent noise. Sponsored by The Great Courses […]

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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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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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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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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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12v dc to 12v ac inverter

Don’t build this 12V DC to 120V AC inverter circuit

A description of how a popular 12V DC to 120/240V AC inverter circuit works and its MANY limitations. Watch this video before you build inverter circuits you find online else you risk damaging your equipment!

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Frequency Modulation tutorial and FM radio transmitter circuit

This video explains what frequency modulation (FM) is and shows a simple low powered FM radio transmitter circuit you can build. It has a range of about 20 meters. PCB        Design files

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laser tachometer

How to build a simple laser tachometer

Did you know you can use an LED as a light sensor? In this video I show you how to use this phenomenon to build a laser tachometer capable of measuring the RPM of mechanical devices.

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zener diodes

What is a zener diode? A zener diode tutorial.

A tutorial on zener diodes and how to use them as voltage clamps, voltage regulators, and how to create audio distortion circuits.

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schottky diode

What is a schottky diode? A schottky diode tutorial.

A tutorial covering the advantages and disadvantages of schottky diodes over regular silicon diodes including forward voltage, efficiency, leakage current and recovery time issues.

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constant current source

Constant current source and laser / LED driver tutorial

An overview of constant current sources and how to build one out of an LM317. Examples are given where you can use a constant current source to drive a string of LEDs or a laser diode.

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Accelerometer tutorial - what is an accelerometer?

How an accelerometer works!

Have you ever wondered how your phone’s tilt sensing function works? It uses a device called an accelerometer. In this video I explain some basic concepts of MEMS (microelectromechanical systems) and show you some MEMS dies under a microscope. Then I explain how these tiny structures can be used to sense acceleration. Accelerometer math

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How to charge a LiPo battery

How to charge a LiPo battery with a power supply

How to charge a single cell lithium ion or lithium polymer battery with an adjustable, current limiting bench power supply.

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Battery chemistry

How to choose a battery: A battery chemistry tutorial

There are many different types of rechargeable battery chemistries out there. Li-Polymer, NiCd, NiMH, LiFePO4, lead acid and more. In the first half of this video I give a brief overview of the basic pros and cons of each type of rechargeable battery chemistry and help you choose a battery for your project. Then in […]

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