Led: Vu Audio Indicator

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

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

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

Circuit diagram for an ultra low-noise driver/supply circuit for white LEDs, using the IC LTC3201. Ensures a stable brightness in white LED driven items.

A circuit with 8 LEDs that flash in a somewhat random fashion (well it's not actually at random, but it does visually appear that way).

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

This is a very eye appealing audio accessory. Displays an approximate output level for each channel of a stereo amplifier. Connects to the speaker terminal; levels are displayed in ten steps. User may select either a moving dot bar appearance. Uses two LM

The circuit flashes five LED's in sequence repeatedly until you turn it off. Flash rate is user adjustable. The circuit uses an IC chip on Board which you will then mount on the included mother board; battery holder is included. Powered by a 3 volt supply

Flashes five very bright LED's in any one of seven, user-selectable, patterns. A COB (chip-on-board) IC makes assembly very easy; the chip is supplied premounted on its own board and a motherboard contains the entire circuit. Operates on 3 volts DC, batte

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.

Versatile light organ based on PIC microcontroller.

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.

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

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

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

Electronic circuit schematic that works as a Hangman LED game. Fun game to play with a friend, and very educational and entertaining circuit to build.

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

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

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.