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DIY Battery Powered NodeMCU Motor Driver Shield for Robotic Applications When developing robotic projects, motors are one of the most important parts of the whole project and there is always a need for multiple motors. But GPIO pins of the Microcontroller boards don’t allow you to draw the amount of current required for a motor. That’s why the motor driver ICs are used. You can build a motor driver circuit by using some electronic components or… |
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DIY Raspberry Pi Motor Driver HAT A Raspberry Pi HAT is an add-on board for Raspberry Pi with the same dimensions as Pi. It can directly fit on the top of Raspberry Pi and doesn’t require any further connections. There are many Raspberry Pi HATs available in the market. In this tutorial, we are going to build a Raspberry Pi Motor Driver HAT to drive DC and Stepper motors. This Motor Driver HAT consists of an… |
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MPPT Solar Charge Controller using LT3652 Almost every Solar based system has a Battery associated with it which has to be charged from solar energy and then the energy from the battery will be used to drive the loads. There are multiple choices available for charging a lithium battery, we have also built a simple Lithium battery charging circuit previously. But to charge a battery with a solar panel, the most… |
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Build a Portable Step Counter using ATtiny85 and MPU6050 In this tutorial, we are going to build an easy and cheap Pedometer using ATtiny85 IC, MPU6050 Accelerometer & Gyroscope, and OLED Display Module. This simple Arduino based step counter is powered by a 3V coin cell, making it easy to carry when you go out for a walk or jog. It also requires very few components to build and the code is also relatively simple. The program… |
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Designing a High Power, High Efficiency Boost Converter using TL494 In this article, we are going to design a TL494 Boost converter, and calculate and test a high-efficiency boost converter circuit based on the popular TL494 IC, which has a minimum supply voltage of 7V and a maximum of 40V, and as we are using the IRFP250 MOSFET as a switch, this circuit can handle a maximum current of 19Amps, theoretically (Limited by Inductor… |
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IoT Based AC Fan Speed Control using Smart Phone with NodeMCU and Google Firebase In this article, we are building an AC Fan Regulator Circuit, which is able to control the speed of the fan by restricting the flow of current to the fan. The term AC Ceiling Fan Regulator is a mouthful, hence we will simply call it a fan regulator from now on. A fan regulator circuit is a crucial component that is used to increase or decrease the speed of an AC Fan/motor… |
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Building a Compact and Low Power Solid-State Relay to Control AC Home Appliances using ESP8266 for IoT Applications Relays are common in many switching circuits where controlling (turning ON or OFF) an AC load is required. But due to the electromechanical characteristic, a mechanical relay has a self-life, and also it can only toggle the status of the load and cannot perform other switching operations like dimming or speed control. Apart from this, an electromechanical… |
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Build Your Own Capacitive Touch Sensor to Control Home Appliance using ESP32 In many cases, ESP32 capacitive touch sensors are used instead of push buttons. The advantage is that we don't have to provide force to press a button, and we can activate a key without touching it using touch sensors. Touch-sensing technology is becoming popular day by day. And within the last decade or so, it has become difficult to imagine the world without touch-… |
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DIY Raspberry Pi LoRa HAT - LoRa Communication between Raspberry Pi and Arduino Raspberry Pi HAT is an add-on board for Raspberry Pi with the same dimensions as Pi. It can directly fit on the top of Raspberry Pi and doesn’t require any further connections. There are hundreds of Raspberry Pi HATs available in the market and we also built Raspberry Pi Hat for 16x2 LCD. In this session we are going to build a LoRa Hat for Raspberry Pi on PCB. This… |
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Design your own ESP Modules for Battery Powered IoT Applications The ESP Controllers from Espressif are becoming a widely popular choice for IoT based designs. There are many kinds of ESP modules and development boards already available in the market, among which NodeMCU is the most popular one. Apart from that, ESP-12E, ESP01 are also popular choices. But if you want to make your design more flexible and compact, chances are that we have… |
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Voice Controlled Home Automation using Google Assistant – Control Multiple loads in Online, Manual, and Timer Mode With the advancement in virtual assistants like Google Assistant and Alexa, Home automation and Voice controlled applications are becoming normal. Now, we ourselves have built many home automation projects, from simple Automatic Staircase Lights to IoT based web controlled Home Automation using Raspberry Pi. But this project here is different, the idea here is to create a… |
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Audio Equalizer / Tone Control Circuit with Bass, Treble and MID Frequency Control using Op-Amp Tone control or Active equalizer circuit especially bass, treble, and MID control based Equalizer is an important circuit in audio amplifier design. Generally, three-stage active Equalizer filters require three control bass, treble, and MID. The bass control allows the low frequency to pass but blocks high frequency and the treble control allows the high frequency to pass… |
