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  • How to build Frequency Divider with 7490

    2018-11-13 00:54:5959

    Description Here you will find a interesting collection from frequency dividers with division factor from 2 until 10. All the choices they are based in...

  • How to build USB Fuse

    2018-11-12 22:48:5060

    Description Life in the 21st century would be almost unbearable without some of the computer peripherals that PC users now look on as essentials - take...

  • ELF AC Milligauss Meter

    2018-11-12 22:08:0659

    Figure 1 The simple circuit is used to illustrate the method of measuring the amount of AC magnetic and electric fields or the extremely low frequency ...

  • AD9834 DDS device evaluation board circuit

    2018-11-12 21:24:1459

    Radio Circuits The AD9834 is a 75 MHz low power DDS device capable of producing high performance sine and triangular outputs. AD9834 has an on-board co...

  • NL5 circuit simulator

    2018-11-12 20:27:1661

    SPICE software The first version of NL for personal computers was developed in the early ‘90s as a tool for switching power supplies design. Since th...

  • How to build Two Cmos Based 24-Hour Timers

    2018-11-12 19:54:3959

    Description These two circuits are multi-range timers offering periods of up to 24 hours and beyond. They can be used as repeating timers - or as singl...

  • The

    2018-11-12 18:09:1860

    The UnFETtered Crystal Radio! Circuit Introduction Several weeks ago I became aware, via the Internet, of an experimental AM 'crystal set' style of rec...

  • How to build Repeating Timer No3

    2018-11-12 18:02:1959

    Description This circuit is very similar to Repeating Timer No.2. However - the addition of the light dependent resistor means that the operation of th...

  • Repeating Interval Timer Circuit

    2018-11-12 17:16:2660

    Repeating Interval Timer Circuit Do not use the "on-board" relay to switch mains voltage. The board's layout does not offer sufficient isolation betwee...

  • How to build Sleeping-Aid

    2018-11-12 17:11:2759

    Disclaimer: we can't claim or prove any therapeutic effectiveness for this device. Based on electromagnetic-field radiation Place it under the pillow -...

  • FM IF MW radio receiver circuit using LA1260 IC

    2018-11-12 17:09:2759

    Radio Circuits A very simple FM IF MW radio receiver circuit can be designed using the LA1260 IC manufactured by Sanyo Semiconductor . As you can see i...

  • Auto Timer Circuit with Extensive Limit by LM555

    2018-11-12 16:51:2160

    Figure 1 The circuit was designed to produce a timing scheme that will provide a longer span of time to become activated. LM555 a highly stable device ...

  • How to build Geomagnetic field detector

    2018-11-12 16:47:0261

    Circuit diagram This basic oscillator will detect the Earth magnetic field. The ferrite rod and coil are taken from an old Medium Wave receiver and a s...

  • How to build Capacitor Discharge Ignition Circuit (CDI)

    2018-11-12 16:00:2063

    Description The CDI ignition circuit produces a spark from an ignition coil by discharging a capacitor across the primary of the coil. A 2uF capacitor ...

  • ULN2429 liquid detector circuit diagram

    2018-11-12 15:55:2360

    Sensors This electronic liquid detector circuit diagram is based on the ULN2429 monolithic bipolar integrated circuit designed for detecting the absenc...

  • High Selective Regenerative Shortwave Receiver

    2018-11-12 15:36:3062

    Figure 1 The circuit was designed to create a portable and sensitive regenerative receiver that will be suitable for shortwave band listening. Shortwav...

  • Smoke Detector circuit diagram using SD2 IC

    2018-11-12 14:48:0859

    Sensors This smoke detector circuit diagram is based on the SD2 CMOS Photo-Electric Smoke Detector Integrated Circuit manufactured by Supertex INC and ...

  • Connecting iPod to Denon ASD-1R with System Connector Termin

    2018-11-12 14:19:0359

    The following schematic shown the iPod operated using the system remote control unit equipped withsystem connector(system control terminal) connected t...

  • Ultrasonic parking sonar circuit design project

    2018-11-12 14:12:3159

    Sensors A very simple ultrasonic parking sonar electronic project can be designed using this schematic circuit . This ultrasonic parking sonar electron...

  • Aerial Booster Circuit Diagram for Citizens Band Project

    2018-11-12 13:33:0259

    Thissimple aerial booster circuit designmight be an alternate or a hobby project for making such an aerial booster device for the Citizen Band (CB) rad...

  • Electronically Designed Dice Game Circuit by LM555

    2018-11-12 13:23:3160

    Figure 1 The objective of the circuit is to build an electronic dice based on the functions of a 555 timer integrated circuit that operates in the asta...

  • How to build Whistle On - Whistle Off

    2018-11-12 13:16:5860

    Circuit diagram This is an extension of the CMOS toggle flip flop circuit shown in the Circuits controlling relays section with the addition of two ban...

  • TinyCAD schematic capture

    2018-11-12 12:46:1359

    Schematic Capture TinyCADis an open source schematic capture program that can be used to draw your own circuit diagrams. Tiny CAD has an user friendly ...

  • LM1819 Automotive Tachometer Application Circuit Diagram and

    2018-11-12 12:28:3059

    Automotive Tachometer application using LM1819 air-core generatorwith on-chip norton amplifier and NPN transistor is shown in the herein circuit diagra...

  • How to build Electronic Selector for 8 Sources

    2018-11-12 12:15:1660

    Description The Elect. Sel. 8 is a simple circuit, with a choice of 8 sources of any sort ,of 8 independent switches. Each switch corresponding with a ...

  • TDA9887 IF-PLL demodulator with FM radio circuit

    2018-11-12 11:25:0262

    Radio Circuits Using the TDA9887 integrated circuit can be designed a very simple IF-PLL demodulator with FM radio . This electronic project is very si...

  • How to build Melody Door Ringer

    2018-11-12 10:39:2059

    Description In all the houses exist the bells in the door. All want, they have the possibility of being possible to change the intensity, the tone of s...

  • Ultrasonic proximity detector circuit

    2018-11-12 10:37:0059

    Sensors This ultrasonic proximity detector circuit is designed using few external electronic components . If an solid object is moved in close proximit...

  • How to build Dual Relay Driver Board Circuit Schematic

    2018-11-12 10:23:3359

    Description A simple and convenient way to interface 2 relays for switching application in your project. This relay driver boosts the input impedance w...

  • How to build Single MOSFET Relay Toggle Circuit

    2018-11-12 09:55:1360

    Description This circuit is similar to the one above, but uses a N channel mosfet such as IRF530, 540, 640, etc. in place of the NPN transistor. Smalle...

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