Metering – Instrument Projects

Arduino Voltmeter

Arduino Voltmeter Code

Metering – Instrument Projects, Projects / By

This arduino projects show how to make voltmeter with your arduino. It use voltage divider concept to estimate the voltage input. Instruction; 1) Connect all jumper wire as shown in diagram. Upload this code to your arduino /*   Voltmeter   Voltmeter base on voltage divider concept.   Code based on: http://www.clarenceho.net:8123/blog/articles/2009/05/17/arduino-test-voltmeter   Coded by: arduinoprojects101.com */ // include the library code: #include <LiquidCrystal.h> // initialize the library with the numbers of the interface pins LiquidCrystal lcd(7, 8, 9, 10, 11, 12); […]

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Arduino RPM Counter

Arduino RPM Counter / Tachometer Code

Metering – Instrument Projects, Projects / By

Arduino projects, make arduino rpm counter with arduino.   Instruction;1) Connect all jumper wire as shown in diagram. 2) Connect IR LED to digital pin 13. 3) Connect IR Phototransistor (dark) to digital pin 2. Make sure shorter lead connected to digital pin 2 and longer lead to Ground. Upload this code to your arduino/** Optical Tachometer** Uses an IR LED and IR phototransistor to implement an optical tachometer.* The IR LED is connected to pin 13 and ran continually.* Pin 2 (interrupt 0) is connected across the IR detector.** Code based on: www.instructables.com/id/Arduino-Based-Optical-Tachometer/* Coded by: arduinoprojects101.com*/

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Power Meter using Arduino

Power (Energy) Meter using Arduino

Metering – Instrument Projects, Projects / By

Part 1.  Analog Front-End. Opto-Isolator. Looking at the Power Quality Analyzer display, I was wandering, if there is any error in the measurement results, introduced by transformer. Overall THD picture doesn’t change much, suspiciously drawing same chart in the morning and in the evening, when electrical grid load significantly differs. Obviously, to estimate effect of

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Audio VU Meter using Arduino 1

Audio VU Meter using Arduino

Metering – Instrument Projects, Projects, Sound – Audio Projects / By

Biasing AC input using resistor divider and scaling up / down if necessary; Sampling fast and accurately using direct access to Control Registers of ADC and Timer1; Subtract whatever was added at step #1 from result of Analog / Digital conversion and Square; Average / accumulate, filtering following VU specification; Sqrt – take square root,

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Arduino Ultrasonic Range Finder

Ultrasonic Range Finder with an ATtiny85 using an Arduino

Metering – Instrument Projects, Projects / By

I’m here to show you how to use a HC-SR04 Ultrasonic Range Finder with an ATtiny85 as well as programming the ATtiny85 using the wonderful shield that randofo created. List of materials: ATtiny85 Programming Library Arduino Uno HC-SR04 Ultrasonic Range Finder and Library Jumper Wires Breadboard ATtiny85 Step 1: Program the Arduino Before you connect your shield to the Arduino

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Arduino Waveform Generator

Waveform Generator using an Arduino

Metering – Instrument Projects, Projects / By

Waveform generators (also called function generators) are useful for testing and debugging circuits.  I often use them to test the frequency response of electronics components like op amp and sensors.  This waveform generator is powered by an Arduino.  It outputs four waveshapes: sine, triangle, pulse, and saw, each waveshape ranges in frequency from 1Hz-50kHz.  The

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