Midget Tone Generator
Welcome STEM kids to old school electronics! The midget tone generator is as simple as useful. With just a couple of transistors and a few other parts, it is fairly easy to build the belittled […]
Isolated Voltage Monitors
Today’s composite electronic designs are likely to have many different power supply rails. This is especially true in circuits employing analog electronics along with microcontrollers. As designs get more complex, the number of power supply […]
Cupboard Light DIY
A cupboard light is a small and useful undercabinet light source that can be easily installed in cupboards, wardrobes, and kitchen cabinets. It can shed light into dark corners and the tiniest nooks and crannies […]
Flashing LED Float
Today we will see how to build a flashing float using a handful of commonly available inexpensive electronics components. This is the circuit diagram of the flashing LED float… List of components is shown below. […]
LED Exit Sign
Interior signage such as lighted exit signs, plays an important role in keeping clients and staff safe during an emergency. This post shares the design idea of a simple and economical LED exit sign. This […]
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 […]