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50 MHz Assistant: |
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Advanced VHF Power Meter: |
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Easy To Build AC Power Meter: 05/12/03
Electronic Design - Ideas for Design / If your goal
is to save on electricity, you must first measure
the ac current flowing through your appliances. The
formula for power is the product of the ac line
voltage and the measured current. Presented here is
a demonstration of how to build an...
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Make a Low Cost Benchtop Power Meter: 09/11/98
EDN-Design Ideas |
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Optocoupler simplifies power line monitoring:
01/10/2002 EDN - Design Ideas / The use of a linear
optocoupler and a capacitor-based power supply
yields a simple, yet precise power-line-monitoring
system. The circuit in Figure 1 converts the 110V-ac
power-line voltage to an ac output voltage centered
at 2.5V, covering 0 to 5V. The circuit isolates the
output signal from the power line. . |
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Power meter is ±1% accurate: 05/30/2002 EDN -
Design Ideas / Power meters provide an early warning
of thermal overload by monitoring power consumption
in high-reliability systems. Power monitoring is
especially suitable for motor controllers,
industrial heating systems, and other systems in
which the load voltage and current are both
variable. The power meter/controller in Figure 1
uses the principle that power is the product of
voltage and current.. |
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RF Power Meter for the QRPer: |
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RF Power Meter: |
