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  • Line-hum-touch-switch

    2015-09-05 15:05:4965

    The monostable period is set for about 1 second, as is the usual case. The induced line hum comes through C2, providing a continuous string of trigger ...

  • Gate Turn Off Switch

    2015-09-05 06:59:3967

    Gate turn-off switch (GTO) is, like an SCR, is a four layer, three junction semiconductor device with three external terminals, namely, the anode, the ...

  • 3A switching regulator

    2015-09-05 06:24:4671

    Description. When compared to linear voltage regulators the switching voltage regulators are much power efficient. In the case of linear voltage regula...

  • Switch off delay circuit by 2N4871

    2015-09-05 05:05:1267

    This circuit prevents surges. From the opening is switched off or power failure. The damage to electrical appliances. The circuit will switch to use a ...

  • Inexpensive Vhf/Uhf Diode Rf Switch

    2015-09-05 02:54:0078

    This circuit uses low-cost IN4148 diodes and exhibits about 1.5 dB insertion loss from 10 to 1000 MHz w ith a few volts of negative bias. D3 conducts a...

  • 230Vac Lamp Toggle Switch (BZX79C12)

    2015-09-04 23:00:1866

    This article describes the 230Vac Lamp Toggle Switch (BZX79C12). The content is very simple, very helpful. Components in this article can help you unde...

  • 5V Supply High-Side Switcher

    2015-09-04 22:42:2565

    Requiring only 10uA of quiescent current, the circuit of (Fig. 62-1 (a)) produces only 0.1ohm ON-resis-tance. IC1 is a charge pump voltage converter to...

  • Sound Activated Switch circuit diagram

    2015-09-04 21:31:4787

    This is a sound activated switch circuit. Its will turn on and turn off based on a loud sound such as clapping your hands. You can adjust the sensitivi...

  • Precision Oscillator With 20ns Switching

    2015-09-04 20:32:1661

    Precision oscillator can be built using quartz crystal, but with proper component selection, you can also build one with RC? (resistor and capacitor) c...

  • One Button On Off Switch with 4093 and IRFZ44

    2015-09-04 14:52:5090

    Figure 1 The load is driven by the MOSFET IRFZ44 and 4093 AND gates are used in the circuit. The output of the 4093 IC drives the MOSFET . Only one but...

  • Magnetic proximity switch.

    2015-09-04 14:16:3965

    Description. Here is the circuit diagram of a magnetic proximity switch that finds a lot of applications in many fields.The circuit is based on a magne...

  • Touch dimmer switch

    2015-09-04 14:00:5269

    By simply touching this touch dimmer switch you can increase the light intensity of incandescent lamps in three steps. Initially, when mains switch is ...

  • Ultrasonic switch

    2015-09-04 10:03:4175

    Description. A different type of remote control circuit employing ultrasonic signals is given here. The transmitter part of the circuit is build around...

  • 5V CAPACITANCE TOUCH ACTIVATED MOMENTARY SWITCH

    2015-09-04 09:29:3271

    This circuit is discussed in more detail in the section on Capacitance Proximity Switch Technology. The circuit is powered from a standard 5v supply. I...

  • Touch Switch Data Input Interface

    2015-09-03 23:47:2862

    This is an interface circuit for digital data input. This circuit consist of touch button, op-amp, diode, capacitor and resistors. Any conductor surfac...

  • Three-phase switch

    2015-09-03 16:47:43103

    To simplify the following schematics and facilitate easy understanding of the principles involved, the following schematic substitution is used (Note t...

  • How to build USB Switch For Printers

    2015-09-03 16:33:16123

    Description This circuit switches a printer’s USB connection from a PC to a laptop. What was needed was a method of allowing a laptop to use the prin...

  • Switching Regulators Using LM 2575 and LM 2577

    2015-09-03 13:57:2676

    Switching Regulators Using LM 2575 and LM 2577 Switching regu-latorsare available is different circuit configurations in-cluding the flyback, feed-forw...

  • Low current touch switch

    2015-09-03 13:19:5374

    Touching the on contacts with a finger brings pin 3 high, turning on the Darlington pair and supplying power to the load (transistor radio etc) Ql must...

  • Magnetic Reed Switch Alarm

    2015-09-03 11:00:3265

    This circuit is made to be an alarm, both for home and handbags. If it is installed for home it will placed on door or windows, and if it is installed ...

  • Step switch selector

    2015-09-03 09:05:2768

    As the name indicates, the step switch selector circuit is intended to choose one of up to four analogue switches, which it does with the aid of some l...

  • Switching Regulator using LM1758 A

    2015-09-03 07:32:5165

    LM1578A Switching Voltage Regulator The National Semiconductor LM 1578 Ais a switching regulator which can easily be set up for such dc-to-dc voltage ....

  • Photoelectric switch

    2015-09-03 06:57:3167

    Synchronous switching is turning on only at the instant the ac supply voltage passes through zero, and turning off only when current passes through zer...

  • How to build Infra Red Switch

    2015-09-03 06:52:0963

    Description: This is a single channel (on / off) universal switch that may be used with any Infra Red remote control that uses wavelengths between 850-...

  • VOX (Voice-Operated Switch)

    2015-09-03 06:07:0269

    This schematic diagram below show a circuit of VOX Box (voice-operated switch). This circuit consist of a Schmitt trigger, a relay driver, and micropho...

  • Touch Switch Circuit

    2015-09-03 02:35:1171

    When the touch-on contacts are bridged, pin 6 of Ul-b goes low, which forces its output (the set output) at pin 4 to go high. That high divides along t...

  • Sound operated two way switch

    2015-09-02 22:18:0580

    This circuit operates a relay each time a sound of sufficient intensity is made, thus one clap of the hands will switch it one way, a second clap will ...

  • Keypad Switch No. 2

    2015-09-02 17:02:1363

    Description This is a simplified version of the Universal Keypad-Operated Switch. I have modified the design to reduce the complexity of the circuit - ...

  • Regulator switching DC to DC step down Voltage with LM2596

    2015-09-02 08:37:3766

    If you are looking for the circuit DC Switching Regulate 3A some sizes are circuit. I begs for to advise this circuit , because use the integrated circ...

  • Clap Switch(LA76814K)

    2015-09-02 05:17:0664

    This article describes the Clap Switch (LA76814K). The principle is very simple, very practical. The circuit components can help you understand better ...

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