20-10-2010, 02:29 PM
[attachment=6673]
MODIFIED LOW-COST ENERGY METER USING ADE7757
The low-cost energy meter project as published in May’05 issue of EFY, which made use of 8-digit, 7-segment displays in conjunction with two counter-cum display driver ICs MM74C926 and a 5V power supply, has been modified to display the KWH reading on an 8- digit LCD calculator in an identical manner, thereby doing away with a large number of components. The modified circuit diagram is shown here in Fig.1. Difficulty had been experienced regarding non-availability and high price of counter-cum-LED display driver IC MM74C926 (IC6 and IC7), which led us to present this alternate scheme. An 8-digit LCD calculator with character display height of 0.56" for good visibility has been used. Connection method. Output from collector (pin 5) and emitter (pin 4)
MODIFIED LOW-COST ENERGY METER USING ADE7757
The low-cost energy meter project as published in May’05 issue of EFY, which made use of 8-digit, 7-segment displays in conjunction with two counter-cum display driver ICs MM74C926 and a 5V power supply, has been modified to display the KWH reading on an 8- digit LCD calculator in an identical manner, thereby doing away with a large number of components. The modified circuit diagram is shown here in Fig.1. Difficulty had been experienced regarding non-availability and high price of counter-cum-LED display driver IC MM74C926 (IC6 and IC7), which led us to present this alternate scheme. An 8-digit LCD calculator with character display height of 0.56" for good visibility has been used. Connection method. Output from collector (pin 5) and emitter (pin 4)
