Audio Projects

60 seconds Voice Record – Playback module

This project is a 60 seconds voice record – playback module.

3 Tone Musical Bell

This project is a 3 tone musical bell.

12W Audio Amplifier

This project is intended for use as low frequency class AB audio amplifier.

Voice Modulator (Sound Effects – Funny Sound)

Voice Modulator project is designed around HT8950A to provide two special sound effects viz.

Tape Head Pre-Amplifier

This project is a tape head Pre-Amplifier circuit.

120 Seconds Voice Record – Play Back

This project is a message recording board capable of recording 120 secs of audio.

20 Seconds Voice Record – Playback

This project is a message recording board capable of recording 10 to 20 secs depending on audio quality.

RIAA Corrector

Description To listen old vinyl LP’s in a correct sounding on a sassy with dynamic cartridge you need a circuit, named RIAA corrector.

Cheap Audio Booster

Universal Preamplifier

Description Most audio amplifier systems must have preamplifiers with many different characteristics.

Portable Audio Amplifiers

Description Above circuits are based on TEA2025 is a monolithic integrated audio amplifier in a 16-pin plastic dual in line package manufactured by UTC .Circuit has an Internal Thermal Protector.

600W Audio Amplifier

Description The circuit is based around {LM4702} manufactured by NATIONAL semiconductors & {MJ11029-MJ11028} by ON semiconductors It is a high fidelity audio power amplifier.