High-End-Preamp, Part 2
The modular design and flexibility of the microcontroller program allow the preamplifier to be built exactly according to the individual requirements of its user.The multitude of options for constructing your ‘personalised’ high-end preamplifier mean that you must read this second part of the article before you order the parts and take up your soldering iron. This is because your requirements determine how many circuit boards of which type you will need, as well as which components you will need. You can connect several volume controls in parallel as illustrated in Figure 1, in order to adjust more than two channels at the same time. If you do this, you must interconnect the CS, Mute, SCLK, +5 V and Ground terminals of the circuit boards. SADATO from the first circuit board is connected to SDATI of the next circuit board, and so on. This causes the volume level setting to be communicated to all of the circuit boards.