RFID card

Interfacing RFID to 8051microcontroller

praveen July 29, 2015 1 Comment
Interfacing RFID  to 8051 . RFID or Radio Frequency Identification is a method in which electromagnetic waves are used for transmitting data for the purpose of identifying tags attached to objects. An RFID system consists of a transmitter (tag) and...
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interfacing PIR sensor and 8051

Interfacing PIR sensor to 8051

praveen February 25, 2016 7 Comments
Interfacing PIR sensor to 8051 microcontroller. PIR sensors are widely used in motion detecting devices. This article is about interfacing a PIR sensor to 8051 microcontroller. A practical intruder alarm system using PIR sensor and 8051 microcontroller is also...
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Frequency counter using arduino

praveen February 19, 2015 11 Comments
Frequency counter using Arduino (upto 40KHz). Many guys here were asking for a frequency counter and at last I got enough time to make one.  This frequency counter using arduino is based on the UNO version and can count...
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Interfacing pressure sensor to arduino

praveen August 14, 2017 6 Comments
Interfacing SPD005G pressure sensor to arduino This article is about interfacing pressure sensor to Arduino. The pressure sensor used here is SPD005G from Smartec . SPD (Smart Pressure Device) is a series of silicon based pressure sensors suitable for...
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Interfacing gyroscope to arduino

praveen December 9, 2014 3 Comments
Interfacing gyroscope to arduino uno. This article is about interfacing gyroscope to arduino. Gyroscope is a device used for measuring the angular velocity in the three axes. It works under the concepts of angular momentum and can be used...
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LPG sensor using arduino

praveen November 18, 2014 6 Comments
LPG sensor using arduino with alarm and cutoff. A simple LPG sensor using arduino is shown in this article. This circuit indicates the amount of LPG in the air. The circuit  sounds an alarm and trips a relay  when...
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8051 Timers and Counters

jojo October 27, 2014 3 Comments
In this article, we focus on Timers/Counters of the 8051 micro controller. The 8051 has two counters/timers which can be used either as timer to generate a time delay or as counter to count events happening outside the microcontroller....
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Water level controller using arduino

praveen October 9, 2014 10 Comments
Arduino water level controller / indicator. This article is a about a fully functional water level controller using Arduino. The circuit displays the  level of water in the tank and switches the motor ON when the water level goes...
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Tachometer using arduino

praveen January 13, 2015 10 Comments
Digital tachometer using arduino plus speed control. Tachometer is a device used for measuring the number of revolutions of an object in a given interval of time. Usually it is expressed in revolutions per minute or RPM. Earlier tachometers...
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Motor speed control using arduino

praveen June 12, 2014 5 Comments
PWM motor speed control using Arduino. PWM or pulse width modulation is a very common method used for controlling the power across devices like motor, light etc. In PWM method the power across the load  is controlled by varying...
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Digital code lock using arduino

praveen April 22, 2015 11 Comments
Simple digital code lock using arduino. Digital code lock or digital combination lock are a type of  digital locks where a combination of digits/characters or both are used for unlocking the lock. This article is about a simple digital...
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Interfacing hex keypad to arduino

praveen December 5, 2014 5 Comments
Interfacing hex keypad to arduino uno. This article is about how to interface a hex keypad to arduino. Hex keypad is a very important component in embedded systems and the typical applications are code locks, calculators, automation systems or...
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Digital thermometer using arduino

praveen June 19, 2014 9 Comments
Digital thermometer using arduino and LM35. This article is about a simple three digit digital thermometer using arduino. Range of this thermometer is from 0°C to 99.9°C. There is also a provision for displaying the temperature in °F scale....
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