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Last Updated
03/31/2019
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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
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PHOTOELECTRIC LIGHT CONTROL xx ELECTRIC POWER CONTROLLER xx PHOTOELECTRIC DEVICE xx SWITCH -- ELECTRONIC Photoelectric outdoor light controller circuit snaps the light on or off (without flickering) depending on whether ambient light levels are rising or falling. Light dimmer gradually changes a lamp's brightness (up or down) at sunrise or sunset. Handles up to 1000 watts load. Modify a photoelectric switch to introduce hysteresis to prevent oscillation that may cause the switch not to function properly. Automatic light switch turns a light on or off according to the general room illumination. Robotic, photoelectric light switch will automatically turn a light on as you enter a room and turn it off as you leave. Schematic diagram for an automatic switch to turn on outside yard lights when dusk falls. Handles up to 2000W total load. Automatic-light circuit turns a single 110-volt lamp on when a room becomes dark (sunset) and off again at sunrise. Cadmium sulfide light control turns lights on at dusk and off at dawn. Automatic low wattage night lighter turns lamp on at dark and off at dawn. Photocells turn lamp on and off and regulate intensity to maintain even illumination. Photoelectric controller turns light on at dusk and off at dawn. Photocell circuit turns a lamp on at dusk, off at dawn. Headlight-operated garage door or light switch. Simple circuit is powered by 9-volt battery. Trips relay to operate door or light. Sensitivity can be adjusted. Circuit to turn up to 1000-watts of power on at dusk and off at dawn. Dark sensor circuit, controlled by a light-dependant resistor, is used to turn on a light. Night-light control "locks down" the relay for a period of time after first activation. This prevents the annoying switching on-and-off that occurs during the transition periods from light-to-dark or dark-to-light with some other photoelectric controls. Outdoor light-sensitive light controller circuit is designed to be connected in series with the 117 VAC lamp to be controlled. Simple phototransistor/relay circuit turns a 117-VAC outdoor lamp on at dusk and off at dawn. Photoelectric lamp control circuit allows an outdoor garage light to come on only when it is dark AND the automatic garage-door operator has been activated. Night-light circuit is a light-dependent switch circuit that's used to trigger a relay, which in turn feeds AC power to a lamp. Lights-on sensor sounds an audible alarm whenever outside lights controlled by heat/motion sensors are turned on. Outdoor light control circuit features adjustable threshold and hysteresis to prevent erratic switching. Used to control any AC-operated device. A mixed collection of practical 555-timer IC application circuits. (1) Schmitt-trigger converts sinewaves into squarewaves. (2) Dark-activated relay switch can control lighting. (3) Code-practice oscillator. (4) Electronic door buzzer. (5) LED flasher. (6) Long-period timers. Circuit for a light-activated switch that will make your outdoor lights switch on and off automatically with the setting and rising of the sun. Four circuits to turn on an AC device by touch, IR light, and/or pushbutton. One version allows remote shutoff using a flashlight. Switch circuit to automatically turn on an inside light when the outside light level drops below a pre-set limit. Automatic garage light control. This light-activated control senses your automobile lights approaching a garage and turns on desired house lights. After a period of time, it flashes the house lights under its control and then slowly dims them down and turns them off. Automatic light controller for carport or garage turns on the overhead lights whenever the automobile headlights strike the sensor. The lights turn off automatically after two minutes. Outdoor light controller snaps the light on or off depending on whether ambient light levels are rising or falling. | |||||||||
Copyright © by Norman Lathrop Enterprises. All Rights Reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means (electronic, mechanical, print photocopying, recording or otherwise) without the prior expressed permission of Norman Lathrop Enterprises, except as permitted by law. |
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