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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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TOUCH SWITCH xx SWITCH -- ELECTRONIC Install a body-capacitive touch-control switch on a microphone to replace the press-bar or spring-loaded switch. Requires much less finger exertion to activate the microphone. Touch plate switch controls electrical devices. Touch switch or proximity detector circuit uses silicon controlled rectifier. Touch-control switch uses a silicon controlled rectifier. Est. cost: $5. A touchplate switch that will control up to 1000 watts of power. Touch-activated switch stays on only as long as you keep your finger on the touch plate. Circuit for a touch switch which accomplishes a switching action with no mechanical switching involved. Electronic touch switches. Six different circuits included. Touch switch circuit will control 9-volt DC loads of up to 100mA. Latched touch switch circuit can activate a 117-VAC relay. Time-delay touch switch built around a 555 oscillator/timer provides a 10-second delay. Useful for triggering a burglar alarm before an intruder can enter a protected area. Circuit for a touch-type switch built around the 555 timer integrated circuit. Can deliver about 10 milliamps to the device being controlled. A relatively bounce-free switch responds directly to human touch and has no moving parts. Use in any situation where direct human input to a computer is desired without the need for a keyboard (music, handicapped, industrial control, etc.). Touch plate draws its power from the electrical fields produced by household wiring, without the need for direct connection. A lamp in the circuit will light up for a few minutes, allowing you to find the regular light switch or to cross a dark room safely. Est. cost: $5. Versatile touch switch. High-speed CMOS circuitry solves reliability problems that are common to other touch-switch circuit designs. Touch control can operate a lamp up to 200 watts. Touch control switch handles up to 150 watts, but can be raised to 720 watts. Est. cost: $14. Touch-plate power switch controls up to 450 watts. Circuit for a simple touch alarm to activate a relay when a small metal plate is touched. Experimenting with phase-locked loops. Circuits include an ultrasonic switch, tunable filter, touch switch, and SCA decoder. Touch-switch circuit uses an integrated circuit in conjunction with discrete devices. Six CMOS digital integrated circuits include an alternate action pushbutton switch and a touch-controlled latch. A simple touch control switch. Single FET amplifier circuit can be used to control a relay or other low-current device. Circuit for a touch-plate switch to turn room lights on and off. Build a touch-controlled solid-state switch to control from 3 to 15 volts. Touch switch circuit uses an integrated circuit, an SCR and a few resistors. Line-hum touch switch energizes when a relay plate is touched and de-energizes up to 1 second after the finger is removed. Two touch circuits built around a 4047 low-power CMOS monostable/astable multivibrator. One is negative-triggered and one is positive-triggered. Three-way touch lamp switch delivers 40-, 80-, and 117-volts AC. Touch switch reacts to the touch of a finger on a sensor plate to turn lights and/or appliances on or off. Touch switch circuit controls 117 VAC lamp. More intruder-detector circuits. (1) Exit delay. (2) Light-dependent sensor. (3) Bridging touch-plate sensor. (4) Single-plate touch sensor. Touch-on/Touch-off circuit. Bridged touch-activated switch circuit. Using a single special-purpose IC (the ULN2429A fluid detector) in as many applications as possible. (1) Low-level liquid level detector. (2) High-level liquid level detector. (3) Touch-activated switch. (4) Proximity sensor. (5) Ultrasonic pest repeller. (6) Variable square-wave generator. (7) Code-practice oscillator. (8) Alarm circuit. (9) Light beam circuit (LED-emitter / phototransistor-sensor circuit). Simple touch switch circuit uses only two high-gain transistors and a capacitor to energize a relay. Touch control circuit can handle a 12-volt load up to 1 amp. Touch-actuated timed-on switch circuit. Four circuits to turn on an AC device by touch, IR light, and/or pushbutton. One version allows remote shutoff using a flashlight. Electronic sensors. Two-contact touch-switch sensor circuit. One-component touch-activated switch handles 6-15 volts. Four circuits for touch sensitive switches. Circuit for a capacity-operated touch switch (COTS). (1) Electronic touch switch circuit. (2) Latching touch switch circuit. (3) Latch/unlatch touch switch circuit. Switch operates by touching metal switch. Touch-controlled switch is mounted in a 3-outlet surface mount AC receptical and controlled by an antenna or any metal object. Circuit is both latching and nonlatching. Est. cost: $5. Touch switch allows you to vary the time the switch is on up to 15 seconds or more. Use it to kill TV commercials, doorbell switch, light timer and other jobs. Replace standard wall switches with this touch module (touch switch). Proximity switch controls up to 300 watts at the slightest touch. Tips on using the "Kaltek" SL-6 module to make a touch-sensitive switch that holds "on" for a predetermined amount of time. Has applications for computer keyboards. Astable touch switch circuit uses an LM324 op-amp. | |||||||||
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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