Archive for category: Audio and Amplifier

Tape Head Pre-Amplifier

Audio and Amplifier | By: Diagram mania

This project is a tape head Pre-Amplifier circuit. Description The circuit is built around a popular Sanyo’s stereo head preamp IC LA3161. Low electrical signals from the playback heads are fed to pins 1 and 8 of IC1 via DC decoupling capacitors, respectively. Components between pins 2 and 3 and pins 6 and 7 provide […]

Micro-Amp Miniature Audio Amplifier

Audio and Amplifier | By: Diagram mania

μAmp Miniature Audio Amplifier The small AF amplifier Suitable for laptops and MP3 players. IT may be powered from the PC (Game or USB) or AC adapter.The basis of the amplifier is an integrated circuit TDA2822M. With this circuit you can build an amplifier with output up to 2x 1 W. This high power circuit […]

Simple 60W class B Power Audio Amplifier Circuit with 2N3055

Audio and Amplifier | By: Diagram mania

This is a simple 60W class B Audio power amplifier. This audio amplifier can work from 30 to 60V with the maximum input voltage around 0.8 – 1V. It is built with the well known 2N3055 and can deliver up to 80W on a 4Ω speaker. 60W audio power amp circuit schematic  

Low Noise Preamplifier Circuit

Audio and Amplifier | By: Diagram mania

A preamplifier circuit with a very low noise characteristic can be built by simply combining a FET transistor with a bipolar one. The input impedance of the preamp circuit is almost the same as the gate impedance of the FET transistor (around 1MΩ) The output impedance at the other end is about 1KΩ. The frequency […]

TDA2030 35W bridged connection power amplifier

Audio and Amplifier | By: Diagram mania

This is a 35W audio power amplifier built with TDA2030 in a bridged connection with a +- 15V symmetric PS. It is easy to build, do it yourself audio amplifier which will deliver up to 35W on a 8Ω speaker. Please use a good headsink to cool down the TDA2030 power amplifier.   TDA2030 integrates […]

MOSFET 240W power audio amplifier schematic

Audio and Amplifier | By: Diagram mania

A high power audio amplifier circuit which can output up to 240W on a 4Ω speaker. This mosfet amplifier is built with BUZ23 and uses a 40V symmetrical power supply. Connect the NTC close to the heatsinker. MosFet 240W power amplifier schematic  

1W Audio Amplifier With Voltage Regulators using IC7905

Audio and Amplifier | By: Diagram mania

A simple stereo audio amplifier is built around two 7905 negative-voltage regulators (IC1 and IC2) and a few discrete components. The circuit will also work with other 79XX regulators if appropriate power supply is used. Regulator IC 7905 works as an amplifier for the voltages applied to common pin2 (Ground or GND).    The minimal […]

2x6W LA4440 Audio Amplifier

Audio and Amplifier | By: Diagram mania

Application: Make your own computer speaker system. This simple and inexpensive project will let you set up a small audio amplifier and let more sound out your computer. Description: A simple audio amplifier based on the LA4440 IC. This will take your computer’s headphone level output and amplify it to drive a pair of external […]

50W Car Power Audio Amplifier using TDA1562Q

Audio and Amplifier | By: Diagram mania

This car audio amplifier with TDA1562Q can output 50W of audio power. TDA1562Q car amplifier circuit diagram 2 resistors 1 KOhms 2 resistors 4,7 KOhms 2 resistors 100 KOhms 2 resistors 1 MOhms 4 capacitors 470 nF LCC 63V 4 capacitors 10 μF 63V radiaux 6 capacitors 4 700 μF 25V radiaux 2 capacitors 100 […]

Operational Amplifier (Op-Amp) Basics

Audio and Amplifier | By: Diagram mania

Operational Amplifier (Op-Amp) Basics Circuit diagram The op-amp is basically a differential amplifier having a large voltage gain, very high input impedance and low output impedance. The op-amp has a “inverting” or (-) input and “noninverting” or (+) input and a single output. The op-amp is usually powered by a dual polarity power supply in […]