Quick & Easy Voltage Regulators
This is an extension of an article published here some time ago (Discrete Linear Voltage Regulator). At this point let us dive a little deeper into the design concepts of the far-famed linear voltage regulators. […]
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 […]
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 […]
Do More with LM324 Operational Amplifier IC
After seeing an old LM324 chip-based thermostat kit in my attic, I decided it was time to whip up a quick refresher on the far-famed LM324 quad operational amplifier IC. I hope it can be […]
Door Status LED Indicator
This post shares the design idea of a simple and cheap door status display panel with tristate indicators. The tristate visual indication features three independent modes viz. steady red (busy indicator), steady green (free indicator), […]