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Current Sensor
High-wattage appliances like
electric irons, ovens and heaters
result in unnecessary
power loss if left ‘on’ for hours unnoticed.
Here is a circuit that senses the
flow of current through the appliances
and gives audible beeps every fifteen
minutes to remind you of power-’on’
status.
This is a non-contact version of current
monitor and can sense the flow
of current in high-current appliances
from a distance of up to 30 cm . It uses
transistors in the input to provide very
high input impedance (1.5 T-ohms),
very low input current (10 pA) and
high-speed switching performance.
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Build your own LC Meter and start making your own coils and inductors. This LC Meter allows to measure incredibly small inductances making it perfect tool for making all types of RF coils. LC Meter can measure inductances starting from 10nH - 1000nH, 1uH - 1000uH, 1mH - 100mH and capacitances from 0.1pF up to 900nF. The circuit includes an auto ranging and "Zero Out" function to make sure the readings are as accurate as possible ... [more] |
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