Schematic Diagrams

As electronic devices using conventional materials reach their limits, research focus has shifted to the development of exotic materials with properties that can make electronic devices more efficient, lightweight, flexible, cost-effective and smart. Take a look at some promising candidates. Most of us assume that smartphones and laptops will keep …

Infrared (IR) remote-controlled RGB bulbs available in the market are extremely expensive. Here is a simple, easy-to-build and inexpensive circuit built using Arduino Uno R3. The project demonstrates how to turn on/off or vary the colours of an RGB LED bulb using an IR remote (used for televisions, air-conditioners, set-top …

Mobile robots have the capability to move around in their environment and are not fixed to one physical location. Mobile robots can be “autonomous” which means they are capable of navigating an uncontrolled environment without the need for physical or electro-mechanical guidance devices. Alternatively, mobile robots can rely on guidance …

All schools and colleges follow a timetable for their classes, providing different time slots for different subjects. In order to follow the planned timetable, a person is assigned the job of turning on and off an electric bell manually at certain time intervals. Here we describe an automatic bell system …

If you frequently use a 3D printer for your projects then you may experience issues calculating the material weight and length usage.  If so, then you might be interested in this project using Arduino. My goal with this project was to be able to dynamically know the filament status during …

Circuits like Geiger counters, insect zappers, Nixie tubes and sensors require high-voltage direct-current (HVDC) supplies. There are various types of HVDC power supply designs available in the market, including voltage doubler or quadrupler, flyback converter and boost converter. Some of these have low current-output capacity. But with right calculations using …

Digi2O Information Solutions Private Limited is a Chennai based IOT company serving the smart automotive segment through its Product Designing, Re-engineering & Consulting Services. Mr Dipankar Ghosh, CEO, Digi2O speaks about the challenges in IOT, it’s adoption in India and government’s roles in expanding the IOT market. Q. Many opine …

Software-defined radio (SDR) is one of the most important wireless communication technologies. It is a unique type of radio system that can tune to any frequency band. The SDR platform is generic, that is, one platform supports various signals of different frequencies. Earlier, SDR hardware was designed only to support …

Panel meters in regulated power supplies are used to display electrical parameters like voltage and current. Presented here is a circuit to display DC voltage and current of power supplies, including DIY-type ones. Circuit and working Circuit diagram of the DC panel meter using Arduino is shown in Fig. 1. …

This door open alarm uses an input sensor fixed at the corner of the door frame and a magnet fixed on the door panel close to the sensor. When the door is opened, the magnet moves away from the sensor, generating a controlling signal to sound the alarm. The circuit …