High Water Sensor
Here is a simple high water sensor system to prevent costly to correct undetected water damage such as that caused by leaking pipes or corroded water heaters. The high water sensor circuitry will detect any […]
Variable Zener Diode DIY
A zener diode is often used as a simple voltage reference device. This post looks at how to create a variable (or adjustable) zener diode. Apparently, you can purchase the long-familiar programmable precision voltage reference […]
Lighted Cone Marker
I recently received a request to share some simplest ideas for converting regular cone markers to lighted cone markers. So, this post explains an idea to make your own lighted cone markers using a handful […]
Ultrasonic Proximity Sensor Arduino
So, here is another easy-to-build ultrasonic proximity sensor based on Arduino to detect objects made from various materials regardless of their shape, colour, or surface contour. Thanks, it operates using high-frequency sound waves that are […]
MH-SR602 PIR Motion Sensor Guide
A passive infrared (PIR) motion sensor allows you to sense motion, almost always used to detect whether a human has moved in or out of its range. For many do-it-yourself projects or devices that need […]
Glowing LED Eyes & Jawa Doll
Whether you are a novice or a seasoned crafter, crafting is a great way to get creative and pass the time. It is even better when you can incorporate some electronics. So in this post, […]
E-Reflector for Bicycles
As we know, a reflector is a small, often red, reflective disc on the back of a vehicle that reflects the headlights of other vehicles. That is fine, but this little post is about constructing […]
Phototransistor Secrets PT334-6C
In this post, you will get acquainted with a pretty popular budget phototransistor PT334-6C which is in fact a high-speed and highly sensitive silicon NPN epitaxial planar phototransistor available in a standard 5mm LED package. […]
Flickering Torch Bulb
What is the simplest circuit you can think of for building a flickering torch bulb or torch bulb flasher/blinker? How many components do you need? This little circuit uses only a few common components, no […]
Quick Logic-Level MOSFET Tester
There is no doubt that nowadays we are seeing more logic-level MOSFETs being used in microcontroller-based hobby electronics circuits and projects. So this week’s little post is about building a quick go/no-go tester for the […]