PSU buffer whatsit / WMD Soft Start

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Big Jilm
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PSU buffer whatsit / WMD Soft Start

Post by Big Jilm » Wed Feb 12, 2020 10:35 am

I've got an annoying problem with my eurorack in that one of the PSUs won't power up if a particular module is plugged into it (even though the total voltage on the PSU is within the limits). The workaround is that i unplug the module, power up the PSU, then plug in the module. Works fine, is annoying. On some forum in the mists of time, a helpful soul suggested that i look into a power whatsit that acts as a buffer, i guess, between the PSU and the module...but i can't remember what it was. Could it have been the WMD Soft Start? Would that do the trick?

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c0rpse
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Re: PSU buffer whatsit / WMD Soft Start

Post by c0rpse » Wed Feb 12, 2020 11:34 am

If you have narrowed it down to the specific module, then yes the soft start is a likely solution.

The soft start waits to see that the power rails are at full power before turning the module on.

Just make sure the power draw on the problematic module isn't over 500mA on either 12V power rail. It doesn't help with 5V.
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Big Jilm
Learning to Wiggle
Posts: 8
Joined: Thu Apr 20, 2017 9:55 am
Location: Capital City

Re: PSU buffer whatsit / WMD Soft Start

Post by Big Jilm » Wed Feb 12, 2020 12:07 pm

cool, awesome, thank you! the max draw is quite a bit lower than that. i'll give it a try.

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