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Meters and Testers

Accurate Speedometer Circuit

Last Updated on May 16, 2026 by Swagatam 30 Comments

Speedometer

Here we’ll see how a simple yet accurate analogue speedometer circuit can be constructed at home using just a single IC and a few external passive components. The speedometer can be universally used with all 2-wheeler, 3-wheeler, even in bicycles for indicating their speeds. Using Frequency to Voltage Converter In my previous article I have […]

Filed Under: Automobile Electronics, Meters and Testers Tagged With: Accurate, Speedometer

Making a Single Channel Oscilloscope using Arduino

Last Updated on May 14, 2026 by Swagatam 24 Comments

lcdconn

In this interesting post, we are going to make a simple single channel oscilloscope using Arduino and a personal computer, where the waveforms will be showcased on the PC’s display and frequency and time period of the input waves will be displayed on the 16 x 2 display.  Introduction Every electronics enthusiast once said “I […]

Filed Under: Arduino Projects, Meters and Testers Tagged With: Arduino, Channel, Making, Oscilloscope, Single

Arduino Frequency Meter Using 16 x 2 Display

Last Updated on May 14, 2026 by Swagatam 4 Comments

arduinodisplayconnection

In this article I will show how to construct a digital frequency meter using Arduino whose readings will be showcased on a 16 x 2 LCD display and will have a measuring range from 35 Hz to 1MHz. Introduction Being electronics enthusiast, we all would have come across a point where we need to measure […]

Filed Under: Arduino Projects, Meters and Testers Tagged With: 16x2, Arduino, Display, Frequency, Meter

Digital Capacitance Meter Circuit Using Arduino

Last Updated on May 14, 2026 by Swagatam 4 Comments

Testing Capacitor with Arduino

In this post I will show how to construct a digital capacitance meter circuit using Arduino which can measure capacitance of capacitors ranging from 1 microfarad to 4000 microfarad with reasonable accuracy. Introduction We measure value of the capacitors when the values written on the capacitor’s body is not legible, or to find the value […]

Filed Under: Arduino Projects, Meters and Testers Tagged With: Arduino, Capacitance, Digital, Meter

Arduino Tachometer Circuit for Precise Readings

Last Updated on May 14, 2026 by Swagatam 4 Comments

A tachometer is a device that measures the RPM or angular velocity of a rotating body. It differs from speedometer and odometer as these devices deal with linear or tangential velocity of the body while tachometer a.k.a. “tach” deals with more fundamental the RPM. Introduction Tachometer is composed of a counter and a timer both […]

Filed Under: Arduino Projects, Meters and Testers Tagged With: Arduino, Precise, Readings, Tachometer

Transformerless AC Voltmeter Circuit Using Arduino

Last Updated on May 14, 2026 by Swagatam 13 Comments

simulation2B1 1

In this article I have explained how to make a transformerless AC voltmeter using Arduino. Making an analog voltmeter is not an easy task as to build one you must have good knowledge of physical quantities like torque, speed; which can be very difficult when it comes to their practical applications. By Ankit Negi But […]

Filed Under: Arduino Projects, Meters and Testers Tagged With: AC, Arduino, Transformerless, Voltmeter

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