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  • How to build AC Line Current Detector

    2018-11-15 23:43:1272

    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

    2018-11-15 23:09:2966

    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

    2018-11-15 22:25:3863

    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

    2018-11-15 22:19:5876

    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

    2018-11-15 22:06:2561

    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)

    2018-11-15 21:44:5367

    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

    2018-11-15 21:38:4161

    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

    2018-11-15 21:29:2063

    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

    2018-11-15 21:01:2362

    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

    2018-11-15 20:36:3262

    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

    2018-11-15 20:16:4463

    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

    2018-11-15 20:10:2066

    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

    2018-11-15 19:56:4960

    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

    2018-11-15 18:14:0762

    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

    2018-11-15 17:37:5463

    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,...

  • MC33099 Voltage Regulator PIN Functions Diagram

    2018-11-15 17:37:0259

    The MC33099 Adaptive Alternator Voltage Regulator is intended to manage the output voltage in diode-rectified alternator charging systems common in aut...

  • How to build Sound Effects Generator 2

    2018-11-15 17:18:4360

    Description: This circuit uses the Holtek HT2884 IC to produce 8 different sound effects. Circuit diagram Notes: All sound effects are generated intern...

  • How to build Electronic Canary

    2018-11-15 16:24:3360

    Feeling chirpy? Attract new friends with this modified hartley oscillator. You could also use it as a replacement doorbell. Circuit diagram Notes: This...

  • Chime Circuit With 4049

    2018-11-15 15:12:2759

    Resistor R1, capacitor C1, and two converters form a square wave generator, which produces the basic tone. The generator is sui followed by an inverter...

  • Temperature indicator circuit diagram

    2018-11-15 15:08:3560

    Sensors This temperature indicator indicates the temperature of a heat sink in high power circuits . In this temperature indicator, diode voltage drop ...

  • LM1830 low level detector schematic circuit design

    2018-11-15 14:29:3360

    Sensors This LM1830 low level detector schematic circuit based on the LM1830 low level detector IC require very few external components and is very eas...

  • How to build Minimalist Oscilloscope

    2018-11-15 14:23:0960

    Circuit diagram: Description If you are the proud owner of an old oscilloscope tube, you may be interested in using it once more for its original purpo...

  • Electronic Selector Driven by Relays

    2018-11-15 14:00:4859

    Figure 1 The circuit was aimed to produce an electronic selector for ten alternative sources with the means of showing the result in a 7-segment displa...

  • How to build Generating Long Time Delays

    2018-11-15 13:25:5759

    Description Generating long delays of several hours can be accomplished by using a low frequency oscillator and a binary counter as shown below. A sing...

  • Universal PSU

    2018-11-15 13:23:0659

    Universal PSU Description: A Universal Power supply based on the L200 regulator, which includes an outboard pass transistor to boost output currents up...

  • ICL7106 electronic thermometer circuit design project

    2018-11-15 13:12:4660

    Sensors Using ICL7106 can be designed a very simple electronic thermometer with LCD display The ICL7106 Integrated circuit contain all the active circu...

  • RS232 DB25 pinout

    2018-11-15 13:00:1562

    Pinout RS232 DB25 pinout description Pin No. Name Dir Notes/Description 1 - - Protective/shielded ground 2 TD OUT Transmit Data (a.k.a TxD, Tx) (ASYNC)...

  • How to build High Voltage Stun Gun

    2018-11-15 12:26:4059

    Disclaimer: As i have seen before, IT IS NOT A TOY, DON'T DO ANYTHING STUPID WITH IT. I DON'T ACCEPT ANY RESPONSIBILITY OF DAMAGES DONE TO OTHER PEOPLE...

  • How to build 123 Game - All MCU-free

    2018-11-15 12:20:1659

    Circuit diagram: Description This electronic game pits a human player against the ‘machine’. The opponents use a common ‘game token’ and take t...

  • TEA5551T AM radio receiver circuit design electronic project

    2018-11-15 12:04:0959

    Radio Circuits Using TEA5551T monolithic integrated radio circuit can be designed a AM radio receiver circuit which is designed for use as a portable r...

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