The TV transmitter circuit presented in this post incorporates the European standard FM frequency for audio and Video up-links. Referring to the circuit below, Q1 is configured as a preamplifier for amplifying the audio input to be modulated. Circuit Description Q2 is fundamentally responsible for conducting a couple of important functions: It amplifies the carrier frequency […]
Audio
Signal Injector Circuits for Quick Troubleshooting of all Audio Equipment
This simple signal injector circuits I have explained below can be accurately used for troubleshooting and alignment applications of all kinds of audio and high frequency equipment. 1) Using a Single IC 7400 One of the extremely handy devices for repairing audio and high frequency instruments is without question a equipment that will give you […]
Simple Audio Spectrum Analyzer Circuit
In this post I have explained a simple yet accurate spectrum analyzer circuit which can be easily made at home and used for analyzing the audio from a music system or simply as a decorative musical device. What is a Spectrum Analyzer A spectrum analyzer is basically a device which is technically used for assessing […]
Convert Audio Amplifier into Pure Sinewave Inverter
If you are not too keen in understanding the deep technical aspects of a true sine wave power inverter, yet want to build it within a couple of hours, then this article will help you to accomplish it using an audio power amplifier and some DC motors. Here we’ll how to convert audio amplifiers into […]