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This is a project of Gentle Touch Circuit Diagram . Consumer appliances these days hardly ever have a proper mains switch. Instead, appliances are turned on and off at the touch of a button on the remote control, just like any other function. This circuit shows how a device (as long as it does not draw too high a current) can be switched on and off using a push button. The approach requires that a micro controller is already available in the circuit, and a spare input port pin and a spare output port pin are required, along with a little software. When power is applied T1 initially remains turned off. When the button is pressed the gate of T1 is taken to ground and the p-channel power MOSFET conducts. The micro controller circuit is now supplied with power. Within a short period the micro controller must take output PB1 high. This turns on n-channel MOSFET T1 which in turn keeps T1 turned on after the push-button is released. Now the micro controller must poll the state of the push-but...

Touch Alarm circuit is widely used for security, which is installed on the door. The advantages of this alarm is because the cost is cheap and difficult to detect by burglars / intruders. The following is an example of a touch of alarm circuit which is designed by Tony Van Roon.   Components List : R1 = 100K R2 = 56K R3 = 10M R4 = 220K P1 = 100K D1 = 1N4004 T1 = 2N3904, or equivalent U1 = 555 Timer* C1 = 47μF/16V** C2 = 33μF/16V** Re1 = Relay*** Notes: *The 555 can be a LM, NE, or MC(cmos) type, they’re all pin-compatible. **C1/C2′s operating voltage should be elevated to 25V if you decide to go with a 12V energy source. Rule of thumb: the operating voltage of capacitors are at least double the supplied voltage, in other words, if the powersource is 9Volt, your capacitor(s) is a minimum of 18V. Transistor T1 could be any approximate substitute. *** Use any suitable relay for the project and if you are not tight on area, use any size. I’ve develop this specific circui...

Fitting switches which turn off automatically after a preset time in these locations can reduce the electricity consumed quite significantly. A single 100W bulb left burning all night (say eight hours) would consume 800W/hrs. The same bulb fitted with a switch which turned off automatically after say five minutes would consume only 83W/hrs, even in the unlikely event that it were to be activated ten times during this period. Triac Control There are two major problems to solve when designing a touch switch to replace a conventional mechanical light switch and these concern the power supply and noise immunity. The main switching element used to control the light is a triac, a semiconductor a.c. switch. This is normally in its off or non-conducting state but can be switched into conduction by means of a small trigger current fed to its gate terminal. Once triggered it will remain conducting until the current through it drops below a certain value (known as the holding current). This occur...

Build a Using Cd4066B Touch Switch Circuit Diagram.The CD4066B consists of four bilateral switches, each with independent controls. When touch switch SI is activated, R4 is driven high, and the control voltage goes high, which latches the switch. When S2 is activated, R4 goes low and the control voltage goes low, which deactivates the switch. Using Cd4066B Touch Switch Circuit Diagram

Consumer appliances these days hardly ever have a proper mains switch. Instead, appliances are turned on and off at the touch of a button on the remote control, just like any other function. This circuit shows how a device (as long as it does not draw too high a current) can be switched on and off using a pushbutton. The approach requires that a microcontroller is already available in the circuit, and a spare input port pin and a spare output port pin are required, along with a little software. When power is applied T1 initially remains turned off. When the button is pressed the gate of T1 is taken to ground and the p-channel power MOSFET conducts. The microcontroller circuit is now supplied with power. Within a short period the microcontroller must take output PB1 high. This turns on n-channel MOSFET T1 which in turn keeps T1 turned on after the push-button is released. Now the microcontroller must poll the state of the push-button on its input port (PB0) at regular intervals. Immedia...

    The Air iPad 2 would be presented as the thinnest tablet on the market with new technology on your screen, new design speaker and fingerprint reader with Apple Pay. Apple prepare an event to introduce the iPad 2 and iPad Air Mini with Retina Display 2 on October 16 and further details of these new products are filtered. According to Pocket-Lint citing sources familiar with Apple's plans, the Air iPad 2 would be thinner than the current version 0.5mm. Also, Apple would use a new technology in the screen of the iPad Air Display 2 now would be a laminate LCD panel (one piece), as new iPhones 6 also bring the new A8 processor. The report indicates that Apple may be presenting it as the thinnest tablet on the market and would remove to allow vibration-mute button that thickness. The front camera would be updated to record 720p video, the speaker would have a new design and be the first to have iPads in Touch Apple ID and possibly Pay (NFC). Apple sold the iPad Air 2 with 32GB, ...

This circuit is designed to generate a 20KHz pseudo sine wave signal that can power about 50 remote touch activated switch circuits.  It can support a cable length of about 2500 feet.  A typical remote switch circuit is also shown as well as a receiver circuit for those switches. 12V Touch Switch Exciter Circuit Diagram Source: DiscoverCircuits