Ambient condition detector with high intensity strobe light

Details Ambient condition detector with high intensity strobe light Ambient condition detector with high intensity strobe light

G - Physics

08

B

G08B 5/38 (2006.01) G08B 7/06 (2006.01)

Patent

CA 2122430

A drive circuit for use with an ambient condition detector limits heat dissipation and associated temperature rises in the presence of varying RMS values of an applied AC signal. The drive circuit includes a voltage doubler with a current regulator located between first and second storage elements. In the presence of a sensed ambient condition, which exceeds a predetermined threshold the regulator is enabled permitting one of the storage elements to be charged to a voltage on the order of twice the peak value of the applied AC voltage. A digital timer is used to trigger a flashable visual indicator from the stored DC voltage. The regulator provides a substantially constant DC voltage to the visual indicator in the presence of a varying AC line voltage.

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