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LED Power indicator for 220v AC mains

LED Power indicator for 220v AC mains

How to make 220v AC LED indicator   Generally we have seen that there are all indicators in our house on the wall switch board are of neon bulb which is small in size and connects with 68k resistor in series. You can make an indicator that glows very nice and looking so cool using LED and  make LED indicator […]

How to make 20w Audio Amplifier

How to make 20w Audio Amplifier

20w amplifier using ic TDA7240    The TDA7240A is a 20W bridge audio amplifier IC . COMPACT HEPTAWATT PACKAGE in 7 pin packing. The audio amplifier shown here is based on the TDA7240 IC . The ic TDA 7240 is an audio amplifier IC that can deliver 20 watts of audio output power into a 4 ohm load. The circuit of audio amplifier using […]

10w x 10w stereo amplifier circuit diagram using TDA2009

10w x 10w stereo amplifier circuit diagram using TDA2009

10w x 10w stereo amplifier circuit diagram using TDA2009 IC TDA2009A is class AB dual Hi-Fi  powerful Audio power amplifier assembled in Multiwatt  package, especially designed for high-quality stereo applications as Hi-Fi and music centers. This ic has the following specification •  HIGH OUTPUT POWER (2 x 10W) •  HIGH CURRENT CAPABILITY (UP TO 3.5A) •  AC SHORT CIRCUIT PROTECTION •  THERMAL OVERLOAD […]

LM386 Audio Amplifier

LM386 Audio Amplifier

LM386 Audio Amplifier Circuit  In this project, i am showing you how to build LM386 Audio Amplifier Circuit. This is a very low cost and easy to make and can power any speaker. As its cost and fewer components required and as the size of the circuit the output sound is loud and enough for small projects and medium power […]

Multitone Doorbell Alarm

Multitone Doorbell Alarm

  Listening same door bell  tune at always may be boring, this melody generator doorbell circuit may help us to avoid this dull situation because this circuit provides 12 tones. This multi tone door bell circuit produces 12 types of musical tone. You get  twelve popular tones in sequences that gives a new dimension to musical door-bells. Whenever a switch is […]

5 KM Long range FM transmitter

5 KM Long range FM transmitter

  Long Range FM Transmitter A FM transmitter can cover maximum distance,  we always try to get the maximum range with maximum power output . there are various different types of fm transmitters circuits available in on the different online websites . but not all circuits are capacity to cover more than 100- 200 meter site range. Here showing a […]

Long Range FM transmitter Circuit

Long Range FM transmitter Circuit

Long Range FM Transmitter Circuit The FM transmitter circuits are generates the output power depending on power amplifier . If any transmitter circuit have consist Rf amplifier stage, oscillator stage then the output power of that ckt provides good power signal. The transmitter circuit described here with an extra RF power amplifier stage, ,increase the power output to 200-250 milliwatts after […]