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

DIY Hobby Electronics

Darlington Transistor Touch Switch Simple Science Project

Components of Darlington transistor touch switch on breadboard

Here is a simple two transistor darlington transistor touch switch that you can build easily on a solderless breadboard. This build follows on from the single transistor touch switch project to significantly increase the sensitivity of the touch sensor. More...

Download the latest projects

Arduino Distance Sensor Part 2

HC-SR04 ultrasonic distance sensor

Following on from the Arduino Distance Sensor project here is an updated version of the software sketch. Two new display modes have been added and the 'Select' key on the LCD keypad is used to swich between display modes. Full explanation of the software is provided. More...

Download the latest projects

Arduino Distance Sensor

HC-SR04 ultrasonic distance sensor

Sensing the proximity of objects can be achieved effectively using ultrasonic echo techniques. Transmitting pulses of ultrasonic sound and measuring the time it takes the echo to return does present us with some interesting challenges however.

The sound can bounce off more than one object at different distances or the pulse is scattered. Sometimes the receiver doesn't even hear the echo. Luckily these problems can be overcome and a useful instrument built using an HC-SR04 ultrasonic transceiver and a little clever software running on an Arduino. More...

Download the latest projects

Magnifying Desk Lamp Best Tool To Buy

Magnifying lamp - My favorite electronics accessory tool I've used a magnifying desk lamp at home for more than 30 years and I've found it to be an invaluable tool for all kinds of things including building electronics projects. I want to upgrade my lamp to one with a better magnifier and a brighter, cooler LED lamp. More...

Download the latest projects

Electronic Engineering Construction Kits For Kids And Parents

Educational electronics construction kits make excellent gifts for children. The kids won't realise that they are learning stuff because they will be too busy building diy projects and clicking together the experiments. This is one of the few kids 'toys' that encourages you to build things that really work and make it fun. More...

Download the latest projects

Transistor Touch Switch Simple Science Project

Components of single transistor touch switch on breadboard

Here is a simple one transistor touch switch that you can build easily on a solderless breadboard. Learn how to build a circuit that turns on an LED lamp simply by placing your finger across two wires.

This project illustrates how you can use a transistor as a solid state switch. No moving parts. Exept for your finger of course. More...

Download the latest projects

Science Projects For Kids First Electric Circuit

Simple science project Light mouth scarecrow

How to do a simple science project with your kids. I was clearing out the loft the other day when I came across an experiment in electricity that I did with my daughter when she was nine years old.

It's a very simple electric circuit but we managed to combine the fun of learning about electricity with the fun of making a work of art. I can't believe that we kept it all these years but I thought that you might like to see it before it gets thrown out.

It's very simple to make so you can easily try it out on your kids too. More...

Download the latest projects

Arduino Safety Cut Out Senses Jams

Hall Effect Sensor monitoring rotating sprocket A reader emailed me a little while ago to ask for my help to program an Arduino board as a safety cut out. He was building a cartridge reloading machine that needed a safety cut out in situations where the motor jams. The solution using an Arduino Uno turned out to be remarkably simple. More...

Download the latest projects

Snap Circuits Extreme SC-750 Videos

Video showcase Snap Circuits Snap Circuits Extreme electronics kits for kids make an excellent gift for a wide age range. The videos on this page demonstrate how much kids love the kits. I got started in electronics with a kit very similar to these. Not only did it provide me with endless hours of fun back then but it also propelled me on my career in electronics and I have never looked back. Take a look at what these kits have to say about it. More...

Download the latest projects

Arduino Programming the HC-SR04 with Interrupts

HC-SR04 ultrasonic range finder module front view Have you ever wondered how they make the parking sensors that you seem to find on all new cars? You know, the ones that start beeping when you are getting close to an object you should be avoiding. The beeping gets faster and faster as you get closer until the beeps all merge into one and... too late you've hit it! 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.