• How to build AC Line Current Detector

    Unclassified  2018-11-15 23:43:1259

    Circuit diagram Description This circuit will detect AC line currents of about 250 mA or more without making any electrical connections to the line. Cu...

  • LM2991 Low Drop Regulator Typical Application Circuit Diagra

    Unclassified  2018-11-15 23:09:2959

    For applications such as post switcher regulator, battery operated equipment and local on-card regulation the herein LM2991 low dropout adjustable nega...

  • Sleeping-Aid Circuit

    Unclassified  2018-11-15 22:25:3859

    Sleeping-Aid Circuit Disclaimer: we can't claim or prove any therapeutic effectiveness for this device. Based on electromagnetic-field radiation Place ...

  • SW Receiver Using MK414

    Unclassified  2018-11-15 22:19:5859

    SW Receiver Using MK414 Description: A Short Wave Receiver based on theMK484(formerly ZN414) that includes the tropical bands and 49 metre bands. Notes...

  • How to build Periodic Timer

    Unclassified  2018-11-15 22:06:2559

    Description: A switched timer with equal make and equal space periods timing adjustable from over 6 minutes to 38 minutes. Circuit diagram: Notes: This...

  • How to build 12 Stage Neon Sequencer (NE-2 / NE-51)

    Unclassified  2018-11-15 21:44:5359

    Circuit diagram Description This circuit is similar to the LED clock using 12 neon indicator lamps instead of LEDs. It operates from 2 high capacity ni...

  • RE46C190 photoelectric smoke detector circuit design

    Unclassified  2018-11-15 21:38:4159

    Sensors Using RE46C190 photoelectric smoke detector circuit can be designed a very simple and low power smoke detector alarm project.. With minimal ext...

  • How to build Music Generator Schematic Using UM66

    Unclassified  2018-11-15 21:29:2059

    Description UM66 is a pleasing music generator IC which works on a supply voltage of 3V. the required 3V supply is given through a zener regulator. its...

  • Soft Start PSU

    Unclassified  2018-11-15 21:01:2359

    Soft Start PSU Description: Two soft start power supplies. The output voltage slowly increases to the desired output. Notes: The output voltage rises s...

  • How to build Seismic detector

    Unclassified  2018-11-15 20:36:3259

    Circuit diagram The piezoelectric element of a kitchen gas lighter is used in this simple, yet effective seismic detector. The piezo element must be pl...

  • How to build Park Aid

    Unclassified  2018-11-15 20:16:4459

    Three LEDs signal bumper-barrier distance Infra-red operation, indoor use Circuit diagram: Parts: R1 10K 1/4W ResistorR2,R5,R6,R9 1K 1/4W ResistorsR3 3...

  • How to build Thunderstorm Predictor

    Unclassified  2018-11-15 20:10:2059

    Description Sure, listening to VHF FM has great advantages over MW/LW AM from the old days — now we have bright stereo free from interference, fading...

  • How to build Safety Guard

    Unclassified  2018-11-15 19:56:4959

    Description Protect your home appliances from voltage spikes with this simple time delay circuit. Whenever power to the appliances is switched on or re...

  • Voice-Over Circuit

    Unclassified  2018-11-15 18:14:0759

    Voice-Over Circuit Application Notes: In its simplest form, a voice-over unit is just a microphone and change-over switch feeding an amplifier, the out...

  • How to build Infra-red Level Detector

    Unclassified  2018-11-15 17:37:5459

    Useful for liquids level detection and proximity devices Up to 50 cm. range, optional relay operation Circuit diagram Parts: R1 10K 1/4W ResistorR2,R5,...

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