![]() ![]() Because of its simple architecture and tool availability it is very popular. If you are working first time on AVR then here are some cool tutorials on AVR micro-controller: ![]() One timer is used for frequency calculation where as another timer is used for generating PWM for DC motor. It has on chip analog comparator and 3-timers running parallel. It is 8-bit RISC processor with maximum frequency up to 16MHz. No mechanical part is used hence low cost (less than Rs.500) and maintenance free. It uses low cost infrared Tx-Rx pair for sensing propellers. It shows RPM speed on LCD and Tachometer setting can be changed from simple push buttons. Attractive feature of this is it measures speed without any physical contact with shaft or motor. Also measuring time interval can be varied for better accuracy. This tachometer is designed using ATMega16 micro-controller and runs at 16MHz. It can be configured for multiple propellers. Overview: Tachometer is used to measure speed of motor or shaft or propeller. ![]()
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