Loud Hailer

This is a simple and useful project of loudhailer the circuit uses only one transistor connected with transformer which puts out a loud sound. The circuit can be easily fixed in a metal package with the speaker mounted on the top. Heat sink is essential for the transistor or it will burn out, fix the

Electronics Beginner Guide Tutorials


Audio Circuits

Power Supply Circuits

LED & Light Circuits

Battery Chargers

Radio & RF Circuits

Telephone Circuits

Test & Measurement

FM Transmitter Circuits


Privacy Policy
Copyright 2012 CircuitDiagram.Org. All rights reserved.
circuit in metal package and also use this metal package as heat sink of transistor. Use carbon mic or telephone mic/telephone transmitter element. The circuit can be build inside of a speaker trumpet like the loudhailers available in market. Make sure that the mic is isolated from the speaker to prevent feedback. Use the transformer which will able to provide 5 watt output power.
Circuit Diagram
Related Circuits

Speech Amplifier

Simple Mic Amplifier

Mic Converter

Microphone Amplifier

Speaker Microphone

Microphone Preamp Circuit

Mic Beep Generator

Simple Audio Limiter

Audio Preamplifier

Audio Preamplifier (Two Transistors)