H - Electricity – 05 – B
Patent
H - Electricity
05
B
H05B 41/34 (2006.01) G08B 5/38 (2006.01) H02M 3/156 (2006.01)
Patent
CA 2055392
A strobe alarm circuit utilising an optocoupler in the DC-to-DC converter portion of the circuit for repetitively connecting and disconnecting an energy-storing inductor across a DC power source. The light-emitting diode portion of the optocoupler is connected in parallel with a resistor connected in series with the inductor for continuously monitoring the current flowing through the inductor; when the inductor current has attained a particular value at which the voltage drop across the resistor is sufficient to turn on the LED, the switch portion of the optocoupler is turned on and disconnects the inductor from across the source. After a short interval determined by the parameters of the optocoupler and associated circuitry. the cycle is repeated.
Gowling Lafleur Henderson Llp
Wheelock Inc.
LandOfFree
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