The door opener derives its power from a 9-V battery. A
momentary-contact switch, 52, is provided in the event that manual
opening and closing is required. Relay Kl is a 9-V type and relay K2 is a
117`Vac latching-type, which automatically latches with the first burst
of current and opens on the second burst.
Door Opener Alarm Circuit Diagram
Door Opener Alarm Circuit Diagram
The gate lead of the LASCR is not used; a light source triggers the
LASCR unit into conduction, causing current to flow in the coil of the
relay. That, in turn, causes Kl`s contacts to close, thereby energizing
K2 (closing its contacts), and operating the garage door motor.
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