18w Audio Amplifier

Three or more inputs with individual level controls feed into the base of Q1, which provides a voltage gain of 20. The circuit design involves a transistor amplifier configuration where three or more input signals are managed through individual level...

Built around an LM380, this amplifier includes tone controls and electronic soft switching. The soft switching circuitry ensures power is balanced. The LM380 is a power audio amplifier capable of delivering up to 14 watts of output power. It is...

This microphone preamplifier utilizes the low-noise integrated circuit uA739. The circuit serves as an example of an effective preamplifier design for dynamic microphones. The integrated circuit contains two identical preamplifier circuits, with the second preamp functioning in the same...

This appears to be an infrared (IR) transmitter. IR signals do not penetrate walls, and it is assumed that this device is intended for use in a room separate from the one in which the user is located, rendering...

This is an evaluation use of a small graphics LCD module. Last summer, SG12232C graphic LCD module has been sold for 1500 Yens from Akizuki Denshi and I bought it. However, I could not find a good application for...

The rear channel "ambience" can be incorporated into an existing stereo system to extract a difference signal (R - L or L - R). When this signal is combined with a direct signal (R or L), it enhances the...