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Meters and Testers

Make this Digital Temperature, Humidity Meter Circuit using Arduino

Last Updated on August 2, 2019 by Swagatam 2 Comments

LCD bb

In our previous article, I have explained how to interface temperature humidity sensor with arduino and read out displayed on serial monitor of arduino IDE. In this post I have explained how to display the reading on a 16×2 LCD display for the proposed digital temperature/humidity meter using Arduino. Introduction This project may be used […]

Filed Under: Meters and Testers Tagged With: Arduino, Digital, Humidity, Meter, Temperature

Testing Alternator Current using Dummy Load

Last Updated on December 28, 2019 by Swagatam 1 Comment

shunt

In this post I have explained a method of checking or verifying alternator maximum current delivering capacity using a shunt regulator as the dummy load and an ammeter. The idea was inquired by Mr. Joe. Circuit Question I need help designing an electronic dummy load that can handle high enough power from motorcycle alternator. I […]

Filed Under: Meters and Testers Tagged With: Alternator, Current, Dummy, Load, Testing

Digital Power Meter for Reading Home Wattage Consumption

Last Updated on July 6, 2019 by Swagatam 20 Comments

power2Bmeter

In this article I have explained a simple digital power meter circuit which can be installed in homes for getting an instant reading of the wattage being consumed by the attached appliances or the loads. The idea was requested by Mr. Nitin. Technical Specifications I m going through a problem. I want to know a […]

Filed Under: Meters and Testers Tagged With: Digital, Home, Meter, Power, Reading, Wattage

3 Frequency to Voltage Converter Circuits Explained

Last Updated on January 20, 2025 by Swagatam 6 Comments

f2Bto2Bv

As the name suggests frequency to voltage converters are devices that convert a varying frequency input into a correspondingly varying output voltage levels. Here we study three easy yet advanced designs using IC 4151, IC VFC32 and IC LM2907. 1) Using IC 4151 This frequency voltage converter circuit using IC 4151 is characterized by its […]

Filed Under: Meters and Testers Tagged With: Circuits, Converter, Explained, Frequency, Voltage

How to Measure Gain (β) of a BJT

Last Updated on January 8, 2024 by Swagatam Leave a Comment

In this post we’ll study a simple opamp circuit design which can be applied for measuring the beta or the forward current gain of a particular BJT in question. What is beta (β) The beta (β) is the forward current gain that every BJT inherently possesses. It determines the efficiency of the particular device in terms […]

Filed Under: Meters and Testers Tagged With: BJT, Gain, Measure

0 to 99 Digital Pulse Counter Circuit Diagrams

Last Updated on January 21, 2025 by Swagatam 27 Comments

0to99countercircuit

The proposed 00-99 digital pulse counter circuit becomes very handy in places where you need to keep the people organized in some specified order. Operating details of the digital counter As may be referred the circuit employs the popular 555 IC to genearte the pulse clocks. The pulse counting is done with the help of […]

Filed Under: Meters and Testers Tagged With: Counter, Diagrams, Digital, Pulse

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