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A GPS tracker is one of the most simple and interesting projects in the field of electronics, and for one of our projects we needed to track the position of a vehicle, so we started looking for circuits on the internet and were very surprised to find out that there were not a lot of modules available online that can do both GSM and GPS at the same time. On top of…
In an ideal scenario, a battery should have zero internal resistance. But batteries are not made perfect and the electrodes are not 100% conductive, which creates a small resistance within the battery called internal resistance. Practically batteries will always have some internal resistance. On paper, the value of the resistance will appear low around 0.1Ω for…
Every engineer and hobbyist nowadays has a workbench for all of their tools and gadgets, and if you're a 3D printing enthusiast, you've probably used the vernier calliper a lot. This emphasizes the significance of precise measurement tools in engineering. After having used many of them throughout our lives, it is now time for us to attempt…
In one of our previous projects, we interfaced SX1278(Ra-02) based LoRa module with Arduino and established communication among them. This was a very simple project and can come in handy for various applications. But what it can't do is establish communication with the internet for modern-day IoT applications. So in this project, we will be using the HPD13A which is…
In this project, we are going to build an animatronic eye with Arduino. I got the idea to create an animatronic eye while looking for new project ideas online, and this project immediately caught my attention. First of all, it looks cool and has a simple mechanism and I learned a lot about mechatronics while working on this project. A big shout out to Will Cogley for…
Most heart diseases are associated with and reflected by the sound that the heart produces, and one of the easiest and cheapest ways of diagnosing cardiac dysfunction is by Heart auscultation i.e listening to the heart sound. Now if we are talking about traditional auscultation, that requires experience and good listening skills. That is why in this project we…
IoT and home automation have come a long way since they first gained popularity in 2014, thanks to the debut of a game-changing IC called the ESP8266 by espressif systems. Today we know it as the nodeMCU module and in many of our projects, we have used this IC to build many home automation projects where our focus was on building AC Motor Speed Control or Phase…
With the advent of technology, our electronic gadgets and appliances are becoming smaller and smaller with more functional and complex applications. With this increase in complexity, the power requirement of the circuit has also increased and in our quest to make the device as small and as portable as possible, we need a battery which can provide high current for a long…
I know making a clock sounds a little irrelevant, especially nowadays because we all have smartphones and no one is going to use or look into the clock for time, but it is good when you are doing some work or during the workout. So, I decided to make one Arduino digital clock for my room. While searching for the clock model, I got thousands of designs but most of them were…
For one of our projects at circuit digest, we wanted to build a Persistence of Vision Display or POV display with WS2812B LEDs. While making the project, our only focus was on how we could make it simpler along with less hardware. As a result, we chose some simple WS2812B RGB LEDs and an ESP8266-01 as the brains for this project because they are lightweight …
There are multiple Lithium batteries available in the market with larger options in capacity. However, as we all know lithium batteries are need to be charged, discharged, or even stored in a particular manner to extend their life. In this project, we will explore a circuit that will discharge the battery fully and provide the result of how much capacity the battery has.…
Bluetooth speaker has now become a pretty popular household gadget that we use on a daily basis. So, for today's article, we thought to design and build our own Bluetooth Speaker. To make things a little more interesting, we have added a strip of WS2812B Neo Pixel RGB LEDs that will be used to visualize the music. In order to make the visualization more responsive, we…
