Click here for a free subscription to "HDE" our site newsletter.
Email:

DIY Hobby Electronics

How To Make A Free Sound Card PC Oscilloscope

PC based oscilloscope signal traces A good oscilloscope can cost you a lot of money but you can build this PC based oscilloscope for less than a decent cup of coffee. Yes it has limitations but if you have no way of observing the signals in your electronics projects and you can't afford to buy a full featured oscilloscope then this little project could be the answer to your prayers. Not only does it give you a dual channel oscilloscope but it will also do a Fast Fourier Transform analysis of your signals too. More...

Download the latest projects

Sound Card Oscilloscope Software

Sound card oscilloscope display I was so impressed by the potential of the Sound Card PC Oscilloscope probe described in an earlier article that I decided to look for alternative software packages that could be used with it. I found one that appears to deliver better results which I am posting here. More...

Download the latest projects

Raspberry Pi Beginner Projects: Setting Up

Raspberry Pi board legend

Get your Raspberry Pi setup and ready to develop projects. If you haven't seen what this little baby can do yet then you are in for a treat. Find out how to download and flash an operating system onto an SD card. Learn how to connect it up then communicate with it remotely as if you where there. Connect it into your local network so that you can share files. More...

Download the latest projects

Getting Started With Electronics Review

Book cover If you are a complete beginner to electronics then this is the book for you. It takes you right from the time that you had your first curious thought about how things work right through to building your own circuits on breadboards. There's no time wasted getting there either. It's a no nonsense, straightforward guide to getting started with your hobby without taxing you to understand loads of theory. More...

Download the latest projects

How To Measure Output Impedance The Easy Way

Z is for Impedance

Output impedance can seem a bit like black magic until you realize that it's really quite simple. Here is an easy yet effective way of measuring the output impedance of almost any circuit. I've avoided turning this into a full-on mathematical treatment of impedance that would bore you to tears. Instead I give you an easy to understand practical feel to the problem instead.

More...

Download the latest projects

Simple Transistor As An Amplifier

Simple amplifier circuit

Build a simple one transistor amplifier circuit that you can use in many projects where you need to amplify small signals. A circuit like this could form the basis of a high quality audio preamplifier and it only uses five components. There is a catch though. Find out what it is in this project article.

More...

Download the latest projects

Sound Card Oscilloscope and Multivibrators

Part of a multivib circuit

What can a sound card oscilloscope do for me? This is the question I get asked a lot and I usually say something along the lines of "No engineer can do without one". Not many people find this very helpful so I've built a simple astable multivibrator and applied the oscilloscope to it. In trying to explain what the waveforms mean I hope to answer the question better.

More...

Download the latest projects

Arduino Tachometer

Rotating fan illuminated by strobe

How to build a simple but useful strobe based tachometer using an Arduino Uno, an LCD/Keypad shield and a few transistors, LED's and resistors. Short pulses are generated with a simple Arduino sketch and used to drive a bank of LED's. This produces short regular pulses of light which when synchronized with the speed of a fan or motor or other rotating object, makes the moving object appear to be standing still. When this happens the light pulse rate is equal to the RPM of the object. More...

Download the latest projects

Arduino Motion Detector

HC-SR04 ultrasonic motion detector

Building on the Arduino Distance Sensor project you can now add motion detection to the features of the device. It detects when objects appear in front of the sensor and because it's ultrasonic it will work in the daylight just as well as it does at night. This can be an advantage over passive infra-red detectors. More...

Download the latest projects

Power Dissipated By Resistor: How To Blow Up A Circuit

A resistor burning with smoke

When you pass a current through a resistor it gets hot. The hotter it gets the more it can adversely affect the circuit that it's a part of. If it gets too hot then it can burst into flames before eventually failing completely. If this happens then it can have catastrophic consequences so it's a good idea to understand why components get hot and design circuits that don't overload the components used. I set about to destroy a resistor and demonstrate what happens when you dissipate too much power in a component. And I wanted to blow something up. More...

Download the latest projects


Now subscribe to our newsletter and don't miss a thing
 

Click here for a free subscription to "HDE" our site newsletter.