The project （1）

Published:2011/8/22 22:48:00 Author:Phyllis From:SeekIC

This project has a modular structure, so it can easily be adapted to individual preferences. It consists of a general-purpose power supply board, an input selector board and the main circuit board, which holds the volume control IC and microcontroller. An LC display module, a keypad and an IR remote control unit complete the package. The hardware and software are described in this article, which is the first of two parts. The other two circuit boards are described in Part 2, which will appear in next issue of Elektor Electronics. Modifying the control program for the microcontroller is also described in Part 2.





If you build all of the circuit boards as described, you will have a complete, remotely controllable preamplifier with input selection and function display. However, you can also dispense with the input selector and use only the volume control capability. If you wish, you can also omit the display, or you can omit the volume control IC on the main circuit board and use the remainder of the circuit as a remotely controllable relay circuit board for various applications. It is also possible to operate several volume controls in parallel, for instance in order to construct a multi-channel amplifier. For this purpose, only the volume control ICs have to be fitted to the main circuit boards for the additional channels. The control software for the microcontroller can be adapted to suit almost any imaginable application without reprogramming the microcontroller.

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