Simple Wheel RPM Meter Circuit

In this post we learn how to make a simple wheel RPM meter circuit for calibrating the RPM in crucial machines which require precise RPM settings. All types machine wheel will have a standard rated speeds (RPM) at which they are supposed to be operated. For example let’s take the example of a wheel rated […]

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Sound Decibel Meter Circuit

The sound decibel meter circuit shown underneath reacts to audio air pressure concentrations from approximately 60 to 70 dB. The sound is sensed by an eight ohm loudspeaker, intensified by a transistor stage together with a LM324 op-amp stage. The other three segments of the LM324 quad op-amp are being used as voltage comparators in […]

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Simple Accurate Capacitance Meter Circuit

In this simple yet accurate analogue capacitance meter circuit, the significance of a capacitor depends upon giving it exactly the same charge as a reference capacitance followed by evaluating the voltages between these.   This utilizes the method C = O/V where C is given as the capacitance in Farads, O would be the charge […]

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Simple Digital Voltmeter Circuit

The article points out a straightforward digital panel type voltmeter circuit utilizing a single IC L7107 and a couple of other normal parts. The circuit has the capacity to calculate voltages right up to 2000 AC/DC V. Providing this easy digital panel voltmeter circuit is especially hassle-free on account of the access of the A/D […]

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