Audio Speakers - Schematics / Manuals

Shows an electronic circuit diagram (schematic) for a simple 10 Watt audio amplifier, using only 4 transistors.

1 Watt Audio Amplifier. 8 Ohms impedance. 20 Hz to 20 kHz. Small, few components.

Schematic for an electronic audio level VU meter that uses LED's to display the volume/audio levels.

This simple stereo audio amplifier will amplify audio for your low-medium impedance headphones and give you left/right balance control

Describes the schematic (circuit diagram) and PCB (Printed Circuit Board) for a cheap 100-150 Watt audio amplifier with few components.

This audio amplifier electronic circuit uses MOSFET transistors to create more than 25 Watts output power. Uses IRF530 and IRF9530 MOSFET transistors.

This kit uses the TDA2009 class AB audio amplifier IC for high quality stereo applications.

Variable gain audio amplifier capable of powering a small speaker for personal use

18 Watt Mono Audio Amplifier. Possible to use two for Stereo sound.

Features a telephone ring generators, phone line in-use indicators and an audio interface circuit.

Schematic for an electronic circuit that behaves as an electronic version of a Roulette wheel. Flashed 10 LEDs in sequence with slowing pace until only 1 remains illuminated.

A Mono audio amplifier which produces a very good 7 watts output power.

High quality 25 watt audio amplifier. Combining 2 would give a 50 watt stereo amplifier.

An excellent Stereo FM Transmitter which operates through the USB port of essentially any computer. FCC Compliant!

2 watts of power across to channels is what this kit delivers. Great quality.

Introduces the Optocoupler-triac MOC3010. Complete electrical isolation between input audio signal (low voltage circuit) and output light modulation. Operates from 100 VAC line. Audio input via 3.5mm jack.

Learn the basics of mechanical and electronic circuits. Lesson includes magnetic recording, audio amplifier theory, motor speed control,mechanical switches, and much more.

A very low cost and simple electronic circuit to generate square, pseudo-sinewave and triangular waveforms in the Audio frequency range. Uses a quad opamp LM348. Good educational kit.

Record as many messages as you can in this modern, non-volatile, memory chip audio recorder