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 […]
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 […]
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 […]
Poorman’s Toilet Bowl/Seat Night-Light v1
Adding something beaming will make your kid’s toilet more attractive. So, in this little post, you will see an automatic toilet bowl/seat night-light project to decorate your kid’s toilet. If you follow this minimalistic idea, […]
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), […]