M1 is a 3V Micro DC motor (whose detail is shown in fig II) which is used in reverse direction (functioning as DC generator) to which we are connecting the shaft of any motor whose r.p.m. has to be measured.When motor runs, a potential difference or voltage will generate between the terminals of the motor. The generated voltage is directly proportional to the r.p.m. of the motor. That is when r.p.m. increases, output voltage also will increase.
Which is measured by the 1st ADC (RA0) of the microcontroller and displays in the LCD in terms of r.p.m.Care must be taken that the same motor (or any DC brush micro motor having same specification of SRF-300) must be used.The ZD1 (5.1V) used here to protect the ADC from over voltage from the motor M1. C1 filters & smoothes the output DC voltage from M1. This meter can be used to measure up to 10500 r.p.m. The measurable range can be increased upto 50000 by replacing the 3V DC motor with 5V DC motor having same specification of SRF-300 except voltage.
7 comments:
what is the name of this product??
i think this idea is quite complicated.... i think we should find another... is it ??
this circuit is very interesting...this product is good for the user in outside......
i not agree with this idea. another idea??
i think this project quite difficult to build.if we do this project there will be high probability our project success?
user like..??
*pending =.="
well done everyone..you all success to access to comment here..I look that have many good comment. when you do some idea for a project. you all must ask you're group "why??" you all do choose this idea..that's really engineer..
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