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 […]
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 […]
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 […]
Mini Alarm Loop v1
Mini Alarm Loop is a simple battery-powered security device to secure worthful goods outside of your home or office, such as bicycles, garden tools, furniture, etc. It sets off a sharp warning signal if severed […]