Programing Arduino using AVR-C


Varun Kumar

I made this to get power and control of every register using AVR-C and the ease of Arduino’s premade circuit along with FTDI chip. I used few simple commands to compile and upload the AVR-C code on my Arduino. By using Arduino I didn’t had worry about FTDI chip, reference for ADC voltage and other peripheral circuitry and by using AVR-C I had control over each and every register which isn’t possible while working with Arduino IDE.

This circuit demonstrates the working of ADC in atmega328p using interrupts, using two different kinds of sensors: one is LDR it’s resistance decrease with increase in light intensity, the other is NTC it’s resistance decreases with increase in temperature.

How Integrated Circuits Got Invented

Written By: 

Mohit Parikh

What is an everyday affair now was only a theoretical possibility half a century ago. Remember, there was a time when computers were the size of a large room. The more complex a computer was, the more the space it required to house its vacuum tube circuitry and the lower became the circuit’s reliability. These were the everyday unsolvable problems for the electronics industry. How we departed from the complex maze of the thick, heavy vacuum tubes and arrived at today’s nano-scale integration is the journey that hinges on a single, defining invention: the invention of Integrated Circuits; and guided by a single, ages old adage: necessity is the mother of invention.  

Robot Guitar

Ben found that the time was right to build what he called the world’s first "Network Time Protocol accurate, Internet of Things connected, Big Ben chiming grandfather clock, firewall log playing, door chiming, guitar playing robot" thing! He had picked up arduino and Rpi and as a hobby learnt them. So what followed were many busy nights and weekends, working on this project on and off, hacking elements of music, computing, engineering, hardware, circuitry, art, lighting, cyber security, time, and working with different kinds of materials- to put it all together for an ideal embedded systems project. The Robot Guitar.

Bark like a Dog to Open the Door – A Raspberry Pi DIY

The ‘Bark Activated Door Opening System’ involves barking, and besides barking, a bark detecting circuit which sends signals to the Raspberry Pi which identifies the barks. There is a motor driver circuit to maneuver an actuator that unlactches a door, and then (I love this part) a weight and pulley system flings the door wide open when the latch is removed. Check out the lovely video and enjoy this unique Door Opening System in action.

Electronic Mosquito Repellent Circuit

Human generations are able to hear frequency which has a range from 20Hz to 20 KHz. All the rest frequency above this is considered as a ultrasonic frequency. Many animals and insects are able to hear this range of frequency. Usually in mosquitoes ultra sound is generated by the male ones and female one receives that one. While after breeding female mosquito mainly used to avoid this frequency. And this circuit produces the same frequency as the male one generates, and these creates a stress on the antennae of the mosquito and these keep them away.

Arduino Based Voltmeter


Ajish Alfred

This is a project based on Arduino board which can measure the unknown AC and DC voltages. When we connect the unknown voltage on the breadboard circuit, the 16x2 LCD displays the voltage value. The project uses an Arduino pro mini board whose ADC feature is used along with the concept of Voltage Divider circuit to develop this Voltmeter.



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