Previously, I made some tutorials regarding current measurements using shunt resistor. Basically, shunt is small known resistance which is in series with the load. And by measuring the voltage drop across the resistor we can find the value of current flowing in the circuit. All credit goes to Ohm’s law: V=IR, by knowing the two…
It is very easy to calculate the hexadecimal equivalent to a decimal number using dividing by 167 method. But this method is very long and sometimes very confusing when comes to large numbers. here I have a Arduino based decimal to hexadecimal converter. But let’s know more about hexadecimal number system and why it was…
I want a smart light, which can be turned on/off just by sensing the human body. Then I found some solutions, they are using PIR sensor to sense the motion as some additional circuitry for the timer. But most of them are rated below 2 stars. Because they are expensive, low build quality, fuse the…
There are various sensor monitoring methods are available some of them using IoT and others using offline protocols like Bluetooth and BLE. But the offline method doesn’t offer a good range and online methods are expensive and very compilated. Today, we are going to make a simple sensor monitoring system using LoRa (long range radio)….
I am aware of sensors, modules and integrated circuit used with microcontrollers like Arduino. And I think Arduino UNO is still the first choice of most hobbyists even after 10 years. Because of its open-source environment and futuristic Software. Developers released some easy to program software’s for it. Arduino Uno is the first MCU of…
I need a big RGB stripe for my gaming room, so that I can stick that on my setup. But I need one with better durability and brighter LEDs with Good heat dissipation. The WS2812 RGB neo pixels may do the fine job but these strips come with flex PCB. Which I would not recommend…
There are many methods to measure the DC current. Hall effect sensors and dedicated hall effect current measuring ICs are available to measure Current precisely. But in this tutorial, we are going to cover very basic method to measure current using shunt resistance in the circuit. We will also make our own current sensor and…
I made some projects using Bluetooth in home automation and robotics. But Bluetooth is quite old tech now, also it is not used vastly because of small range. But BLE changes the whole concept of Bluetooth to not use in home automation projects. BLE stands for Bluetooth low energy and keeping low energy in mind…
NTC and PTC are known as thermistors, which can be further known as temperature-controlled resistance. Now something is related to resistance but how it works and which type of circuits can be designed using these components. Let’s know the working concept and then we will use them practically. The value of these thermistors is not…
Previously, I designed an esp8266 shield. And today we will about to know that how to program this esp8266. Because our shield has the same pinout as it is in ESP breakout. Now we will see how to do make all the connections and how to setup Arduino IDE for esp8266 boards. I ordered SMT…