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Watt Hour Meter Circuits
Last Updated on: Thursday, June 25, 2015 06:20 AM


David A. Johnson's Circuit designs
  • Watt-Hour Meter MonitorThis is a simple and safe way to monitor the power and energy use of a typical home.  A battery powered device is attached to the top of a typical spinning wheel type watt-hour meter.  The device contains a visible red LED and a PIN photo diode.  Light pulses are bounced off of the watt-hour meterís spinning wheel.  The circuit detects the black mark on the wheel and produces a clean TTL level logic signal, equal to the frequency of the wheel spin.  This information can be connected to a low power RF transmitter to send to a matching receiver, where the information can be recorded and displayed . . . [Hobby Circuit designed by David Johnson P.E.,  09/28/08]


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

30 W Digital Wattmeter for RF (0-500 MHz) -  This project will explain how I build my new wattmeter. This watt meter will be able to measure power from 300 nW to 30 WAT(0-500 MHz). This wattmeter is based up on a dummy load of 50 ohm which can handle 50 W. The measurement will be displayed. . . 

 

A Low Cost Watt-Hour Energy Meter Based on the ADE7757 -  AN-679 Analog Devices App Note. . . 

 

A Switchable RF Probe/Watt Meter for the FM Transmitters -  This unique project is one of the most trusted homemade test instruments to have, once you get your FM transmitter up and running ! ! !This simple little device is capable of finding your FM transmitters'. . .  [braincambre500 AT yahoo.com]

A Tamper-Resistant Watt-Hour Energy Meter -  AN-563 Analog Devices App NoteBased onADE7751 and Two Current Sensors. . . 

 

A Tamper-Resistant Watt-Hour Energy Meter Based on the AD7751 -  AN-574 Analog Devices App NoteWith a Current Transformer and a Low Resistant Shunt. . . 

An Electronic Watt-Watt-Hour Meter -  Application Note. . .  [National Semiconductor]

 

AN220: Watt-Hour Meter using PIC16C923 & CS5460 -  Application Note Published 16-Oct-00. . .  [Microchip]

 

AN-265: An Electronic Watt-Watt-Hour Meter -  Application Note. . .  [National Semiconductor]

 

AN-559: A Low Cost Watt-Hour Energy Meter Based on the AD7755 Chinese Version-5/2000 -  AN-559 Analog Devices App Note. . . 

 

AN-679: A Low Cost Watt-Hour Energy Meter Based on the ADE7757 -  AN-679 Analog Devices App Note. . . 

 

Analogue Wattmeter -  Unlike current or voltage measurement, the measurement of power is somewhat inconvenient as power is the product of voltage (V) and current (I) flowing through a dissipative circuit. . . .  [© EFY Enterprises Pvt. Ltd. All rights reserved.]

 

Digital Wattmeter -  The extra input B is for a later SWR brigde project, also the TX serial output will be in use later. The uncalibrated signal response is: +1/-1 dB from 1MHz to 450MHz. Input SWR vill varry from 1. 00 to 1. 30, depending on input frequency. To make the SWR this good, you need to assemble the input circuit correct and adjust the capasitor. Input power range: -60 to +30dBm that is 1 nW to 1 Watt. . . . 

 

Digital Wattmeter, from nanoWatts to KiLowatts, with AD8307, PIC16F876, LCD Display -  My Radio amateur callsign is OZ2CPU. I like to use Atmel AVR Atmega PIC16 PIC16F876 PIC16F84. Most electronics easy made for the novice and something is for the more experienced. . . .  [oz2cpu at gmail dot com]

 

Digital Wattmeter, measures from nanowatts to kilowatts using AD8307, PIC16F876, LCD Display -  This Wattmeter is in ELEKTOR MAGAZINE OKTOBER 2002, they will sell PIC and PCB. The extra input B is for a later SWR brigde project, also the TX serial output will be in use later. The uncalibrated signal response is: +1/-1 dB from 1MHz to 450MHz. Input SWR vill varry from 1. 00 to 1. 30, depending on input frequency. . . . 

 

Low Cost Watt-Hour Energy Meter Based on the AD7755 Chinese Version-5/2000 -  AN-559 Analog Devices App Note. . . 

 

Low Cost Watt-Hour Energy Meter Based on the ADE7757 -  AN-679 Analog Devices App Note. . . 

 

Switchable RF Probe/Watt Meter for the FM Transmitters -  This unique project is one of the most trusted homemade test instruments to have, once you get your FM transmitter up and running ! ! !This simple little device is capable of finding your FM transmitters'. . .  [braincambre500 AT yahoo.com]

 

Tamper-Resistant Watt-Hour Energy Meter -  AN-563 Analog Devices App NoteBased onADE7751 and Two Current Sensors. . . 

 

Tamper-Resistant Watt-Hour Energy Meter Based on the AD7751 -  AN-574 Analog Devices App NoteWith a Current Transformer and a Low Resistant Shunt. . . 

 

True RMS Watt Meter -  This circuit is not an origional idea of mine. It was taken from a "National Data Book". (1986 Linear Application Handbook. )  However I designed the PCB for it. . . .  [G.L. Chemelec, designer]

 

Watt Meter Measures True RMS Watts -  Measure All your AC Household Appliances. . . .  [G.L. Chemelec]

 

Watt-Hour Energy Meter Based on the AD7755 Chinese Version-5/2000 -  AN-559 Analog Devices App Note. . . 

 

Watt-Hour Energy Meter Based on the ADE7757 -  AN-679 Analog Devices App Note. . . 

 

Watt-Hour Meter Monitor -  Have you ever wondered how much power your house or apartment is using?  Most watt-hour meters are like the one shown below. Some newer ones have a digital display but there millions of these older models still in use . . . [Hobby Circuit designed by David Johnson P.E.,  09/28/08]

 

Watt-Hour Meter using PIC16C923 & CS5460 -  Application Note Published 16-Oct-00. . .  [Microchip]

 

Wattmeter -  The extra input B is for a later SWR brigde project, also the TX serial output will be in use later. The uncalibrated signal response is: +1/-1 dB from 1MHz to 450MHz. Input SWR vill varry from 1. 00 to 1. 30, depending on input frequency. To make the SWR this good, you need to assemble the input circuit correct and adjust the capasitor. Input power range: -60 to +30dBm that is 1 nW to 1 Watt. . . . 

 

WATTMETER (uses DVM for display) -  This is a pretty good half wave wattmeter that display true watts. Its output is a DVM floating on the power line, so be careful!. . .  [From Dick Cappels' project pages]


Watt Hour Meter Circuits


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