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LA4440 - 6W 2-Channel, Bridge 19W

Thu, 10/01/2009 - 18:19 — vip

2-Channel, Bridge 19W typ Audio Power Amplifier

Manufacturer: SANYO

Features:


1W Mono Amplifier with IC TDA7052

Thu, 10/01/2009 - 18:00 — vip

This circuit is a 1 watt mono amplifier using the TDA 7052 from Philips. It is designed

to be used as a building block in other projects where a battery powered audio

amplifier is required to drive a small speaker. It will operate best from 6 – 12 V DC and

requires no heatsink for normal use.

TDA7052


Audio Mixer with 3-Channel Input

Thu, 10/01/2009 - 17:28 — vip

Overview The circuit was designed to provide an overall gain of one between the output and each input channel on an audio mixer with 3-channel input.
Explanation

A mixer is a device that can be used to merge two or more electronic signals into one complex output. It can have a classification as frequency mixer, electronic mixer, audio mixing console, mode mixer, or vision mixer.


Circuit of a digital volume

Thu, 10/01/2009 - 16:43 — vip

Circuit of a digital volume control using six discrete ICs, including a 5V regulator, is presented. IC1 (555) is configured to function as astable flip-flop. Its frequency or period may be adjusted by proper choice of resistors R44, R45 and capacitor C6 combination. Here it is for 0.3 second period.


Stereo Amplifier with Mute and Stand-by Circuit

Mon, 08/10/2009 - 21:28 — vip

Stereo Amplifier with Mute and Stand-by Circuit

 SINGLE SUPPLY


Audio monitoring system

Mon, 08/10/2009 - 21:03 — vip

Description : Here is the circuit schematic of a simple audio surveillance system in which the transmitter will pickup sound from one location and the receiver at other location will reproduce it. The receiver and transmitter are connected by only one set of wire. Here both power supply and transmitted signal share the same wire.


Speaker to microphone converter circuit

Mon, 08/10/2009 - 20:50 — vip

Description : This circuit is a simple approach for converting a loud speaker into a microphone. When the sound waves fall on the diaphragm of a speaker, there will be fluctuations in the coil and there will be a small proportional induced voltage. Usually this induced voltage is very low in magnitude and useless. Here in the circuit the low voltage is amplified using transistors to produce a reasonable output. The transistor Q1 is wired in common base mode and produces the required voltage gain.


600W Audio Amplifier

Thu, 07/30/2009 - 00:08 — vip

Description :

POWER :
Maximum Output power @ 8ohms : 300watt
Absolute max power supply voltage :±38V to ±40V
Recommended power supply voltage :±30V to ±35V


Power megaphone circuit

Wed, 07/29/2009 - 20:02 — vip

Description: Just about any power transistor can be used in  this megaphone.Its suitable for boats,playing fields etc.the transistors Q1  & Q2 are the HEP-230 type which are easily available in the market.The transistors are parallely connected to handle the required power and speaker matching.The microphone is a carbon type like that used in telephone hand sets.If  a regular carbon mike is used the push-to-talk (PTT) switch can be connected in place of S1 to provide PTT operation.There will be no warm up or “capacitor charge time.


20 Watt Simple Amplifier With Graphic Equalizer

Tue, 07/28/2009 - 10:02 — vip

TDA2002 is class B chip power amplifier in pentawatt package designed. Single chip power output is 8 watt with 12 volt single supply. 20 watts bridge mode amplifier.

Features:

  • Very law number of external components
  • Easy assembly
  • High reliability
  • Flexibility in use
  • Protections short circuit, thermal, fortuitous open ground, load dump
  • voltage surge

    Power supply:

  • 18 volt max
  • 3 ampere

 


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