[sdiy] Quick and Easy Power Question

[Ben Stuyts]

Hi Shawn,

> On 4 Nov 2020, at 05:23, Shawn Rakestraw <shawnrakestraw at gmail.com> wrote:
> 
> Thanks all for your comments. Especially for taking time to calculate out the specifics. To answer some of your questions:
> 
> The 2 amp supply uses a different regulator, one rated at 2 amps. The schematic is from my original 1 amp design.

My calculations about power dissipation and temperature increase still hold. Although the thermal resistance might be a bit lower depending on regulator and heatsink. But you will see that it will still get very hot. You need to get rid of almost 9 Watt of heat (per rail) and that is always a problem.

Best is, do some more testing and get confidence in the PSU. It is important to get this right as it powers a lot of expensive (in time and/or money) modules. And you don’t want to be chasing random power supply problems along the way.

Ben