Category Archives: Simple projects

Level Shifter using op-amp

We use an ADC very frequently. Input range of an ADC is normally 0 to +5V. Atmega AVRs contain typically many 10bit ADC channels (6 for atmega8 to atmega328 and 8 channels for atmega8535). The designer faces a problem when … Continue reading

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Room temperature indicator

TINAH can be used to indicate room temperature on 2×16 LCD display.

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BinT

A timer can be very cost effective if we use LEds to show numbers. BinT uses simple LEDs to display a number in binary format.

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Arduino Simple Timer

This article describes a simple timer using Arduino.

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Simple security alarm using Arduino

A simple security alarm was developed in two consecutive workshops at Techno e School.

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Over voltage protector for a battery

Lead acid battery over voltage protector It allows the charger to charge the battery such that,

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The robotic arm

  This video shows you how a simple robotic arm works.

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Light sensor

Abstract: This project make use of an LDR (light dependent resistor) to sense light and darkness and control the bright white LED.

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Frequency shift keying

Abstract: To send logical zero and logical one, at a long distance, this method is adopted.

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Simple timer

Abstract: This simple timer makes the output LED “on” for some time and then goes “off”. The chip NE555 (or equivalent) is off the shelf available and is low cost.

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