AVT5382 A

The audio line preamplifier with the signal input switch is an indispensable element of any amplified amplifier circuit. The described project is equipped with a relay (PVC) volume control eliminating problems with modern potentiometers and remote control to improve service while maintaining the simplest possible system solutions. Thanks to the use of modern elements, a very decent result can be achieved with a small cost.

Recommendations: a complete preamplifier with a source selector that is useful, for example, in a built-in power amplifier.

Basic parameters:

• inputs for 3 signal sources, gain control
• 230Vac power supply
• "minimalist" design, intended for users with high requirements
• a preamplifier based on low noise LM4562
• remote control using the RC5 transmitter
• ATmega328 microcontroller, LCD display

Includes printed circuit boards and documentation.

A detailed description in EP2 / 13 or