NCV Tester Secrets
A non-contact voltage tester (NCV Tester) makes electrical work easier and safer – and for a few bucks you can own it from your nearest home improvement center. The NCV tester is a simplest and […]
Cable Float Level Sensor/Switch – First Look!
Float switch a type of level sensor that float on the surface of a liquid. It basically consists of a hollow float body containing a sensor or switch. As the liquid level rises/falls, the float […]
mmWave RADAR Sensor Primer
I have been using several microwave motion sensor doppler radar modules for years, but in cases where an ultrafine movement detection is demanded, those cheapo modules did not perform well. So I decided to have […]
TTL & PWM Laser Drive – Revised Primer
This article shows basic circuit ideas for pulsing low power visible semiconductor lasers using inexpensive components which are fairly readily available. First of all, you need to know that this is a very belated sequel […]
Photosensitive Hobby Servo
There are many ways to use standard hobby servos in do it yourself projects. I semi-regularly hear about design concepts that I’m not familiar with. Recently, I had a reader, who’s an amateur toy maker, […]
Tiny Bicolor LED Fader
Not all Arduino projects demand all GPIOs. ATtiny85 microcontroller certainly helps in miniaturizing such projects as required. So, for simple projects, the ATtiny85 can be a great choice. Recall that the ATtiny85 microcontroller chip is […]
Water Outflow Alarm v1
Water outflow alarms (flood sensor alarms) are arguably the most widely used commercial water leak detectors since they are cheap and easy to install. A water outflow alarm helps protect your home and belongings from […]
Simple Servo & LED Controller
Hopefully this short post will give you some practical pointers for making your own LED spotlights that also includes a servo actuator. There are dozens of different ways to drive standard hobby servos, and here […]
Raspberry Pi Pico Breathing LED Xmas Star
Xmas star is more than just a lovely ornament. The Xmas star is also known as the star of Bethlehem and is a major seasonal symbol throughout the globe. Well, Christmas is just around the […]
Smart Badge for Smart Kids – micro:bit fun!
Get ready to make a smart badge or a simple wearable device such as a wristband, lanyard or watch-style device for your smart kids. And, introduce your kids to electronics and microcontrollers without them even […]