Schematic Simple PIC RF/Microwave Frequency Counter

This RF/Microwave Frequency Counter project built based on PIC 16F876A. The basic counter rate is extended to at least 180MHz using two 74Fxx devices. A divide-by-64 prescaler is used for higher frequencies up to at least 4.5GHz. All results of the measurement are shown on an inexpensive, 2x16 alphanumeric LCD module with large characters....

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Schematic Smartphone AVR DTMF Remote Control

This project based on Microcontroller AVR ATtiny 2313 and SmartPhone as main part. The project can controls 3 relays by DTMF sounds emitted by a Smartphone. Emilio, the designer, said that this project useful for controlling, for example a rover, using relay as motor power switches.The Smartphone (with Windows Mobile 6 OS) can run as web...

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