energy meter - from watt to kilowatt-hour meter

energy meter elektor june 1983 energy meter from watt to ki lowatt-hou r meter Energy costs money and these costs are rising in line with the demand and shrinking resources. Nobody escapes these costs and it is therefore of interest to all but very wealthy consumers to know how much energy a certain appliance has consumed over a certain period of time. A (kilo)watt-hour meter will tell you accurately. This knowledge will also help in determining the cost- effectiveness of energy-saving measures. In this article we will tell you how the watt-meter featured in our May issue can be expanded to become an energy meter. Figure 1. Block schematic diagram of the circuit necessary to expand the watt-meter published in our May issue into an energy meter. The exten- sion consists of a digital counter which counts pulses produced by a VCO in the watt-meter. The number of pulses is directly proportional to the measured power and time. VCO 4096 x10 -0 x100 RESET S OVERLOAD 83067-1 6-24 If you w...