bc547 - Rickey's World of Microcontrollers & Microprocessors

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Hi TB,

As our friend pdi33 has put it rightly, you are basically building a freq.counter/meter.

i would suggest to go with 1 sec sampling period, which gives accuracy of 1 Hz.

also what is the max freq./rpm of the engine ?

you can also use a normal NPN transistor like BC547 for connecting the input voltage,
feed the +7V to the base of transitor via a suitable value resistor (4k7/10k) and the collecto... Read Compelte post

Other Tags: npn transistor sampling period bc547 micro circuit suitable value

Posted by Arun Kumar V on Sun Aug 10 2008, 09:01 am

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