Tachometer Peripheral with Hall-effect sensor, seven segment display and serial communications

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Submitted by: John Baraclough
Download Link: link src1.zip

The tachometer uses an eight blade rotor attached to a motor shaft with a Hall-effect sensor. It is designed as a stand alone peripheral to a host. The tachometer board has a four digit seven segment display (from Three-Five Systems). It communicates with the host over an RS485 half duplex link, via a Maxim MAX3100 UART. The code contains both UART and seven segment drivers. (Hardware schematic included in PDF format)

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