Simple Laptop Audio Amplifier Circuit

When it comes to laptop sounding, most of the laptops currently in the market has very low sound output (laptops like DELL XPS is an exception). If you need more powerful sound, you need to amplify the sound output from the laptop. Here's a simple amplifier circuit making use of the SANYO LA4440 IC which is ideal for low power audio applications because it gives better sound clarity and less distortion.

Laptop audio amplifier circuit

Fortunately the circuit diagram is very simple and even a beginner can assemble and debug it. The circuit is built around the previously mentioned LA444o IC and a few components. The amplifier is a dual channel one with 6W for each channel. So a 10 W speaker would be very sufficient. Connect pins 2, 6 and ground of IC1 to the stereo jack which is to be used with the laptop.

22W Mobile Car Stereo Power Amplifier

The circuit diagram shows a powerful stereo amplifier which can deliver a power of 22W.It is built around popular single-chip audio power amplifier TDA1554Q (IC1).Here it is configured as two 22W stereo bridge amplifiers.

Listening to songs stored in mobile phone while driving is dangerous. It's also against laws. But you can use your mobile phone as a stereo music source and it requires amplification to drive speakers. Also This does away with the need of a sophisticated in-dash car music system.

TDA2030 Subwoofer Amplifier Circuit

This TDA2030 amplifier circuit is ideal for driving low frequency subwoofer speakers in home theater systems.The TDA2030 is a monolithic integrated circuit intended for use as a low frequency class AB amplifier.

Video Amplifier Circuit for Camera

There are occasions when you want to view your video clips taken in your digital camera on your TV. You can do so by interfacing the camera video output to video input of your TV. But this times you cant connect directly as it needs some amplification before the signal reaches from camera to television.

Digital Controlled Precision Amplifier Circuit

Here is a circuit of a precision amplifier with digital control can be useful for signal conditioning  of low output transducers in milli volt range.The  resistors R3 to R6 can be selected by the user and can be anywhere from 1 kilo-ohm to 1 meg-ohm to select the appropriate gain of the precision amplifier. C1 reduce ripples in the voltage and Z1 and Z2 limits input voltage to +- 4.7V