Category Archive: Tutorial

How To Make Nice Looking DIY Front Panel

Want to make really nice looking front panel for your next DIY project? Then you’re in the right place!

Converting ATX Power Supply to Lab Bench Power Supply F.A.Q.


Since I’m receiving at least a couple of questions each day about my tutorial video on Converting Computer ATX Power Supply to Lab Bench Power Supply and I can’t answer them all, I thought it’s time to answer to the most frequently asked questions. If you think that I forgot to highlight some important question(s), …

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How to Choose a Switching Power Supply For Your Next Project

Sometimes selecting a switching mode power supply for your project is no easy task, but information provided here would get you started. In this article I will tell you about most important things you need to know about switching mode power supplies (SMPS) (or just Switching Power Supplies – SPS). So, let’s begin!

Break-Beam Sensor

About one month ago I had a request to write about break-beam sensors. So, here it is! Well, basically break beam sensor consists of two parts: transmitter and receiver. Transmitter emits light (it could be, for example, an LED or a laser) and that light goes to receiver. If that light beam between transmitter and …

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Complete Soldering Tutorial

In this, rather comprehensive, tutorial I’ll tell you all you need to know about soldering.

Using Microcontrollers (Atmel AVR and Microchip PIC)

Many people using Arduino or some other development board in their projects, instead of making their own board with microcontroller because they simply don’t know how to design PCB with microcontrollers. What microcontrollers need in order to operate? This time I will be focusing on two most popular 8 bit micro architectures: Atmel AVR and …

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Using Relays (Tips & Tricks)

In this article I will tell you how to get shorter relay switching times and how to minimize relay current consumption. The same exact things apply to solenoids and solenoid valves. Usually if you want to control relay from microcontroller you would do something like this:

Interfacing Microcontrollers: Temperature Sensors

One of the most often things you need to do in electronics is to measure temperature. Even a simplest device might need an over-temperature protection. In this temperature sensors overview video you’ll find out about most common types of temperature sensors, their main characteristics and usual ways of connecting those sensors to microcontroller. I’ll make …

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Interfacing Microcontroller: Darlington Transistors

In this video I’ll tell you what is darlington transistors, how to use them to switch medium current loads with microcontroller and what downsides they have. Also you’ll find out about darlington arrays. Of course there would be small demonstration of controlling different loads at the end of this video. In case if you don’t …

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Simple Adjustable Linear Power Supply (Based Around LM317)

How to build your own linear adjustable power supply based on LM317. In this tutorial I’ll explain how linear power supply works, what parts it consists of and a lot of small details, like how to calculate smoothing capacitor value, or how to choose a transformer. Plus you’ll see how to build an actual power …

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