Automatic Shutdown Circuit for Arduino (v1)
Some time ago I had posted a couple of Arduino projects that work in conjunction with external power supply circuits. If you have not already got those ideas yet, you may simply go through the […]
Matchbox Magic Lamp v1
This post is about the construction of a multi-colored matchbox-sized magic lamp for kids using a simple and cheap microcontroller board. The most interesting thing about this build is that it does not require any […]
Arduino Spider Wrap
Spider wrap is a type of security device used by many retailers. It’s simply a wired alarm that is attached to products to prevent theft. If the wire on the spider wrap is cut, the […]
A Tiny Task Light
Ever wondered how to build a multimode task light, and how to use a single button switch to change the mode of brightness? I too was curious about it so I studied many things about […]
Build Light Indicator – Arduino Inside!
I recently got my hands on a string of COB LED modules with lens for a big project – smart driveway marker. I’m still tweaking things but I’m planning to share the project soon enough. […]
Magic Cup Light Module – Quick Tries
What is a Magic Cup Light Module you may be asking yourself? Well it’s an inexpensive Chinese module comprises a small mercury tilt switch and a light emitting diode. In this article, I’m going to […]
Over Voltage Protector (OVP) Switch
In yesteryear I’d designed and developed an AC230V over voltage protector switch based on the popular PIC microcontroller PIC12F675 (shown below is the photo of that prototype). The electronic switch can be used to safeguard […]
Attiny85 Programming Adapter for Arduino
Using an Attiny85 microcontroller is an attractive and economical way to build a minuscule Arduino project backed by a few lines of code. Very often such a project will demand an external adapter to program […]
Using Real Time Clock (RTC) DS3231 with 8051 Microcontroller
You might be seeing a wall clock running with a 1.5V battery or a digital watch running with lithium or silver oxide. But, an interesting thing is, if you want to tick a clock in […]
Interfacing RTC DS3231 with 8051 Microcontroller
Have you ever thought how your computer and smart gadgets displays time? This is done using an RTC (Real Time Clock). This tutorial explains DS3231 RTC interfacing with 8051 using I2C. After the end of […]