Toggle Switch Control of Single Coil Switch Machines    (KATO® Machines) -  switch machine control circuit for model trains. . .  [Designed by Rob Paisley]

Toggle Switch Control of Twin Coil Switch Machines -  These circuits allow an ON-ON type DPDT toggle switch to control a twin coil switch machine motor. The handle of switch can then be used to indicate the route selected. The circuits are also able to control LEDs that could be used to indicate the selected route. . . .  [from Rob Paisley's Model Train web site]

Toggle Switch Control of Twin Coil Switch Machines  -  switch machine control circuit for model trains. . .  [Designed by Rob Paisley]

Toggle Switch Debounced Pushbutton -  This is a unique and interesting circuit that I found somewhere. It's a simple circuit that has two characteristics. It debounces the pushbutton switch with just a few parts. It also always comes up reset so that Q1 is on and Q2 is off. . . .  [Designed by John Lundgren]

Toggle Switch Debounced Pushbutton -  This circuit was adapted from the "Toggle switch Debounced Pushbutton" by John Lundgren. It uses a N-channel power MOSFET to control the load and can switch fairly large currents depending on the MOSFET used. The IRFZ44 is a 50 amp device available at Radio Shack for $2. 99 and the IRF10 is a 4 device available for a dollar less. . . .  [by Ashish Parab]

Touch Activated Alarm -  Not much to tell here as the circuit speaks for itself. The 555 can be almost any type, they are all pin-compatible. Although some CMOS types may not have enough power to drive the transistor, in that case use an ordinary 555. C1's working voltage should be increased to 25V if you decide to go with a 12V power source. Change the value of C1 for the desired output pulse. . .  [Tony van Roon's circuit]

Touch Activated Switch -  This circuit provides about one watt of non-isolated DC power for an automotive type 12v LED array lamp in addition to a standard incandescent table lamp.  . . . [Circuit by Dave Johnson P.E.,  01/18/02]

Touch Alarm for Door Knob -  I designed this hobby circuit many years ago and it seems be a very popular construction project. Many companies offer simple alarm devices for personal use in bedrooms or hotel rooms. A metal chain attached to a box holding the electronics is place . . . [Hobby Circuit designed by Dave Johnson P.E.,  05/29/00]

Touch Dimmer -  . . . 

Touch Keypad -  This board layout was created using the SOIC version of a PIC16F627A without drawing the usual schematic first. Most of the part values are etched on the Layout. The SIP resistor packs I used are 10k ohm, some experimentation with this value may be useful. . .  [Luhan Monat-Mesa Arizona]

Touch Operated Switch -  Touch operated switches are an attractive project for DIY electronics but they are not so common in commercial products. The reason for this is that, although there are many different ways of implementing a touch switch (leakage, hum pickup, capacitance, albedo) all of them rely on body parameters which vary a lot with the person's body, age and environment so that a circuit which gives reliable operation with one development engineer may cause problems in use with, for instance, old folks living in arid areas. Nevertheless touch switches can give excellent results. . . .  [Page's Author: Richard Torrens]

Touch Sensative Relay Switch -  Our TOUCHER-TRS1 has many applications; Turn on for predetermine time light motor etc simply by touching sensitive metal pad. Use the kit anywhere you’d like to draw an audience and a smile show friend your magic-touch. The unique small design will allow you to mount kit almost anywhere. Operates from 9 to 12VDC (optional), or via one of our 9 or 12 battery simulator/regulator kits. The alternative uses are endless. It’s designed for the beginner as well as the expert. . . .  [Kit from Elich Industrial Development, Corp]

Touch sensistive touchpad -  What to give your next project that distintive 'high tech' look?  Want to do it for under $5?  I make my own single sided boards for most of my projects lately. This board layout was created using the SOIC version of a PIC16F627A without drawing the usual schematic first. Most of the part values are etched on the Layout. The SIP resistor packs I used are 10k ohm, some experimentation with this value may be useful. . . .  [by Luhan Monat-Mesa Arizona]

Touch Sensor Switch Circuit with 555 timer -  This is a very simple touch sensor switch that is build with the 555 timer IC. You just need to touch the metal plate and the relay gets energised and is kept in this state for about 100 seconds, then is released. This kind of sensor switch is suitable for making touch operated bells, buzzers of small toys which operate for a. . .  [Circuit posted by Popescu Marian]

Touch Switch -  The Touch switch circuit will detect stray voltages produced by mains voltages and electrostatic build-up in a room. In the first circuit, pin 2 must see a LOW for the circuit to activate. If sufficient static voltage is detected by the plate, the chip will change state. If not, you will need to touch the plate and the 0v rail. . .  [designer's name not found on the website]

Touch Switch -  A touch switch is a switch that is turned on and off by touching a wire contact, instead of flicking a lever like a regular switch. Touch switches have no mechanical parts to wear out, so they last a lot longer than regular switches. Touch switches can be used in places where regular switches would not last, such as wet or very dusty areas. . .  [Design by Aaron Cake]

Touch Switch -  Schematic only, no circuit description included. . .  [designer's name not included]

Touch Switch -  This circuit uses a 555 timer as the bases of the touch switch. You can learn more about 555 timers in the Learning section on my site. When the plate is touched the 555 timer is triggered and the output on pin 3 goes high turning on the LED and the buzzer for a certain period of time. . . .  [Randy Linscott's design]

Touch Switch -  PIC Project  . . .  [Luhan Monat - Mesa Arizona]

Touch Switch 240VAC -  This is another capacitance based touch on/touch off switch, which can control power to a 200 watt 240vac load . . . [Hobby Circuit designed by Dave Johnson P.E.,  02/12/02]

Touch Switch Circuits -  Here is a great collection of touch switch circuits. A touch switch is an electronic device that enables us to control a circuit by simply touching a sensor. Simple touch switch circuit with 4011 – source The circuit as you can see from its diagram is very simple and only uses 8 components. The heart of the circuit is. . .  [Circuit posted by Popescu Marian]

Touch Switch Circuits -  All the circuits and projects we describe in these articles consist of very important "building blocks" that you can add to other designs. This time we describe the concept of touching a plate (or two plates separated by a small gap) and turning a circuit ON or OFF. A TOUCH PLATE is classified as a high impedance device. . .  [email Colin Mitchell: talking AT tpg.com.au]

Touch Switch controls a 120 VAC load -  This is a capacitance based touch on/touch off switch, which can control power to a 200 watt 120vac load . . . [Hobby Circuit designed by Dave Johnson P.E.,  07/11/06]

Touch Switch Exciter -  If you have hundreds of touch switches that need an excitation signal, then this circuit is what you need. Its 20KHz 20v peak to peak output signal can supply up to 3 watts of touch switch excitation power . . . [Hobby Circuit designed by David A. Johnson P.E.,  02/11/02]

Touch switch needs no DC return path -  02/03/05  EDN Design Idea   Common designs for touch switches detect a decrease in resistance when a user's fingertip either connects a contact to the circuit's common ground or supplies an injection of 60-Hz ac voltage, resulting from immersion in the electro. . .  [by Brad Albing, Philips Medical Systems Inc, Cleveland, OH]

Touch Switch using Transistors -  Schematic & notes only there no circuit description. . . .  [Tony van Roon's circuit]

Touch Switches -  . . .  [by John Simonton]

Touch-Activated Timer Switch Extends Battery Life -  10-Jul-08 EDN Design Idea   Designed to fit into the battery compartment of an optical mouse, this circuit automatically shuts off the battery after a time delay. . .  [by Israel Schleicher, Prescott Valley AZ]

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