Simple Wattmeter (for AC 230V)
A simple wattmeter, P18F2550 based, with minimal hardware. The software is written in mP (mikroPascal from Mikroelektronika).
In this wattmeter most of the actual work is done in software, the few external components only forward measurement values to the PIC where the actual measurements are done and calculations are made.
It measures:
- the Rms voltage (unit: Volt)
- the Rms current (unit: Ampère)
- the apparent power consumption (unit: VoltAmpère: VA, the product of both the rms Voltage and the Rms current). This value is also called “Complex power”.
- the real power consumption (unit: Watt) (= the one that you are going to pay for)
- the power factor (no unit, ratio of real power to the apparent power), is the same as “cosΦ” (cos phi) for sinusoidal voltages and currents.
It measures:
- the Rms voltage (unit: Volt)
- the Rms current (unit: Ampère)
- the apparent power consumption (unit: VoltAmpère: VA, the product of both the rms Voltage and the Rms current). This value is also called “Complex power”.
- the real power consumption (unit: Watt) (= the one that you are going to pay for)
- the power factor (no unit, ratio of real power to the apparent power), is the same as “cosΦ” (cos phi) for sinusoidal voltages and currents.
Want to build a project?
Bring your design to life with the Elektor PCB Service, powered by Eurocircuits. Upload the project files and order professionally manufactured PCBs or assembled boards through a proven European production platform.
Supporting KiCad, Eagle, Gerber, and ODB++ formats, the service is suitable for everything from prototypes and validation builds to series production and volume manufacturing.
Made in Europe. Fast. Reliable. Professional.
Updates des Autors