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  • Colour Coded Capacitor

    2018-02-28 08:44:4662

    ACapacitorstores electric charge. Basically a capacitor consists of two metal plates separated by an insulating material called“dielectric”. When c...

  • UHF indicator

    2018-02-28 08:31:3263

    UHF indicator or wavemeter is some kind of device that measures frequencies and determines LC circuit frequecy resonance . This device does not need to...

  • Polarity indicator circuit

    2018-02-28 08:31:1860

    Is is easy to test the polarity of a circuits point whether it is positive or negative by using the tester circuit featured here. The tester circuit ha...

  • Hearing aids circuit

    2018-02-28 08:26:4864

    This low-cost, general-purpose electronic hearing aids works off 3V DC (21.5V battery). Transistor T1 and associated components form the audio signal p...

  • MODEL RAILWAY TIME Circuit

    2018-02-28 08:20:5864

    MODEL RAILWAY TIME Circuit Here is a circuit that will convert any clock mechanism into Model Railway Time. For those who enjoy model railways, the ult...

  • Electronic Lie Detector Circuit

    2018-02-28 08:04:2164

    This electronic lie detector circuit will give two readings: one for difficult questions for the subject and another to show its emotional state in gen...

  • Short Circuit Indicator

    2018-02-28 07:49:1362

    Here is a valuable Add on circuit to save electronic components in the assembled board from damage. It gives warning beep if there is a short circuit i...

  • Static Electricity and Precautions

    2018-02-28 07:46:2265

    Static electricity is an imbalance in the amount of positive and negative charges found with in the surface of an object. The sudden flow of static ele...

  • PC Watcher | Turn On and you

    2018-02-28 06:37:4061

    This little PC Watcher circuit will help you to prevent unauthorised access to your personal computer. After construction on a small piece of veroborad...

  • VHF field strength meter

    2018-02-28 06:32:0960

    Description. This is a simple and low cost wide band VHF field strength meter. The field strength is measured by converting the radio signal to DC and ...

  • Signal tracer circuit.

    2018-02-28 06:11:5266

    Description. A high gain amplifier circuit that can be operated from a battery pack of 6 or 9 volt battery pack is shown here.The IC1 uA 741 is wired a...

  • How to solder SMD chips

    2018-02-28 06:05:1562

    How to solder SMD Chips by practice. At first, I tinned all the circuit board pads for the SMD chips before trying to mount them. That was a mistake. W...

  • Cat repeller circuit

    2018-02-28 05:31:4770

    With this cool cat/dog repeller circuit you could chase the cats? off? from any where you want. In fact, I designed this circuit to chase my cat from m...

  • Police siren

    2018-02-28 05:21:3363

    Description. The circuit given here produces an alarm similar to the police siren. When you press the push button switch S2 capacitor C1 will charge an...

  • MACHINE GUN Circuit

    2018-02-28 04:43:2066

    MACHINE GUN Circuit This circuit produces a sound very similar to a machine gun: Reprinted Url Of This Article: http://www.555-timer-circuits.com/machi...

  • Optocoupler devices and application

    2018-02-28 04:28:5461

    An optocoupler (or an optoelectronic coupler) is basically an interface between two circuits which operate at (usually) different voltage levels. The k...

  • Variable Zener Diode

    2018-02-28 04:03:0262

    This variable Zener diode circuit acts like a Zener diode with a breakdown voltage adjustable in a vast domain. The current through the voltage divider...

  • UM3561 Siren Generator Design

    2018-02-28 03:46:5863

    UM3561is an excellentROM ICthat can generate Multi siren tones simulating Police siren, Ambulance siren, Fire brigade siren and Machine gun sound. This...

  • Jet engine sound generator

    2018-02-28 03:31:5061

    Description. This jet engine sound generator circuit is based on the sound generator IC HT2844P from Holtek Semiconductors. This particular IC can make...

  • Wind Sound Effects circuit

    2018-02-28 03:21:4165

    This wind sound effect generator circuit perfectly imitate the noise of the wind. Transistor T1 is connected as a Zener diode and will provide a noise ...

  • Infrared detector with PID20

    2018-02-28 02:29:4463

    This infrared detector circuit uses a passive IR-detector component PID20. It converts heat radiation into electrical impulses. The output voltage of t...

  • Compact Disc. How it Works?

    2018-02-28 02:21:1762

    A Compact Disc (CD) is an optical disc used to store digital data. CD-ROMs and CD-Rs remain widely used technologies in the computer industry.CD-ROM dr...

  • Electronic dog whistle circuit

    2018-02-28 02:20:4064

    Need electronic dog whistle? It is widely known that dogs can hear sounds with frequencies higher than the humans cant hear. Sound frequencies higher t...

  • 13V 5A adjustable regulator using LM338

    2018-02-28 02:10:3565

    Description. This 13V/5A power supply is based on the famous LM338 IC from the ST Microelectronics. The IC has time dependent current limiting, thermal...

  • Bike Turning Signal Circuit

    2018-02-28 02:08:4263

    Bike Turning Signal Circuit This circuit can be used to indicate left and right turn on a motor-bike. Two identical circuits will be needed, one for le...

  • Retriggerable Monostable Circuit

    2018-02-28 01:54:3962

    CD 4047 is the low power Monostable / Astable Multivibrator that requires only an external capacitor and a resistor to give the output pulses. The valu...

  • Optical devices

    2018-02-28 01:27:5760

    Electronic optical devices have varied applications in telecommunication, military services, medical field and in automated control systems. Solid stat...

  • Capacitor meter circuit

    2018-02-28 00:25:3363

    The capacitor meter presented here canmeasure capacitiesbetween 100pF and 1uF on five areas of measurement, more we can say multimeter or tester. Circu...

  • LATCH Circuit

    2018-02-28 00:01:2963

    LATCH Circuit This circuit is a LATCH and remains ACTIVE when the push-button has been pressed for an INSTANT and released. Reprinted Url Of This Artic...

  • Electronic head or tail circuit

    2018-02-27 23:37:1063

    The principle used in this electronic head or tail circuit is simple: a multivibrator controls a flip flop. The multivibrator oscillates as long as the...

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