ProtoDAC TDA1387 X8 project

[hifinet]

Yes, it will work. It's more than you need for this project. You can use it in the future for other projects. It's very versatile. It is an unassembled kit. You can use a transformer (for example, a center tapped power transformer) for a linear supply, since it has a full wave bridge rectifier, or input from the laptop SMPS to pin 3 (positive voltage) and pin 2 ground. You will use the LM317 side (pins 1 and 2 of P1), and leave the LM337 side idle.

Note that the diodes in the full wave bridge rectifier will drop 1.2V on the front end. If you want a lower voltage drop and quieter supply with a transformer input, use a Schottky full wave bride rectifier in place of the silicon rectifier supplied with the kit. The silicon diodes won't add switching noise with the SMPS input, because they are always on.

If you plan to use it only with a DC SMPS, you could bypass the full wave bridge rectifier and caps in the front end, and feed the positive supply directly to pin 3 of the LM317.