## Simple LED Stopwatch Using IC 555 and IC 4017

In this post we are going to construct a simple LED stopwatch using IC 555 timer and IC 4017 decade counter. The elapsed time is indicated by LEDs which illuminates in a sequence. Stopwatch is very important piece of equipment in sports, cooking, laboratory, medical etc. They are used to measure short period of time […]

## Simple Continuity Tester Circuit

Using this simple continuity tester circuit continuity among a pair of points could be examined effortlessly by using a multimeter. However multimeter simply being a costly gadget, several amateurs don’t have one of their very own. Apart from that, for each test, you have switch your eyes on the meter, and also the test prods […]

## 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 […]

## 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 […]

## 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 […]

## 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 […]

## How to Build a 1.5 V Inductance Meter Circuit

Right here a easiest yet quite precise inductance meter is introduced, which is often developed within couple of minutes. Moreover, the circuit may be powered-up with a single 1.5V cell. In spite of this, a frequency meter could well be needed to work-out the inductance. The circuit is fairly self-explanatory in which, two NPN transistors […]

## How to Build a ESR Meter Circuit

The submit addresses a basic ESR meter circuit that are available for recognizing bad capacitors in an electronic circuit without getting rid of them practically from the circuit board. ESR which means Equivalent Series Resistance is a negligibly small resistance value that typically turns into an element of all capacitors and inductors and can be […]