Digital Tachometer using Arduino Microcontroller

A tachometer is a device that is used to measure the speed of rotation of any device. Using the analog voltage reading property of an arduino, this can be easily implemented using the appropriate parts. Tachometers have a variety of applications, including measuring the speed of dc motors in order to ensure they are running according to specifications.

In order to make a tachometer, we will have to convert the speed of rotation into a readable form. The only form the arduino can read is in terms of electrical voltage. It is well known that if voltage is given to a motor the motor wheel will turn, the speed of which is determined by the amount of voltage given. However the converse is also true, meaning that if we were to rotate the motor by ourselves, we can obtain a voltage across the two ends of the motor terminals.

Check out the complete project here

More projects on arduino

Voice Recorder using IC aPR33A

In embedded or electronics projects there is need of voice guidance or the people making project in DTMF needs IVR system to give voice reply at the output. So most of the people prefer IPOD, MP3 player, or SDCARD Module. All the things are costly and difficult in connecting to the system. Sometimes even there is problem in sound generating some kind of noise.

The systematic or typical way is to use specialized voice circuitry which can be operated by any microcontroller and the message can be played by the microcontroller logic controlling the chip. This can be easily done using IC APR33A. This is new IC in the market. It can store recording upto 11 Minutes. And it can be operated upto message mode of 1/2/4/8, depending on the requirement of user.

Check out the details: Voice Recorder

Latitude & Longitude Display System Using GPS & AVR Microcontroller

This project is a reference to budding engineers or a helping hand to those who willing to work and interface a GPS Receiver with microcontroller and making their own channel to communicate with satellite, seeking for some useful information from satellite to make a effective and efficient system.

 Before we check all the details of this project, here is the final implemented circuit diagram of longitude and latitude display system using GPS and AVR microcontroller.

Check out this complete tutorial on Engineers Garage: AVR GPS Tutorial