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A capacitance meter.
Member rating: No Rating | Words: | Submitted: Fri Oct 24 2003
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THE CAPACITANCE METER The block diagram shows the basic arrangement for the design of a capacitance meter. Range resistor Astable Monostable Display Multivibrator Multivibrator Cx Unknown capacitance (1) An astable multivibrator is also known as a free-running multivibrator. It is called free running because it alternates between two different output voltage levels during the time it is on. The output remains at each voltage level for a definite period of time. If you looked at this output on an oscilloscope, you would see continuous square or rectangular waveforms. The astable multivibrator has two outputs, but NO inputs. The word "Astable" means not stable and so we know that an astable multivibrator is a multivibrator with no stable state. (2) The circuit diagram for the astable multivibrator using IC 555 is shown here. The astable multivibrator generates a square wave, the period of which is...
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