[sdiy] BIG PSU ISSUES

[Dan Snazelle]

wow
sounds expensive

--------------------------------------------
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http://www.myspace.com/lossnyc


http://www.soundclick.com/lossnyc.htm


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> Date: Fri, 15 Aug 2008 07:46:49 -0700
> From: dlmanley at sonic.net
> CC: synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] BIG PSU ISSUES
>
> Dan Snazelle wrote:
>> what fuses do you guys recommend (something that smokes easy...i like the 22 ohms because i smell it as SOON as something has gone wrong. the fuses on my psu have never once tripped but i have burnt lots of resistors...thank god
>>
>> --------------------------------------------
> For design/debugging you should buy a bench supply with adjustable
> voltage *and* adjustable current limiting. This allows you to set a max
> current the supply will deliver, then you don't have to worry about a
> bulk supply turning a wiring error into a puff of smoke. Before
> powering up a new circuit it is a good idea to use your ohm meter to
> measure between the power rails and ground and make sure you don't have
> an unexpectedly low resistance or a dead short. With the adjustable
> bench supply you can set the voltage (unloaded), then slowly bring up
> the current while watching the ammeter on the supply and stop if you see
> the circuit drawing way too much current.
>
> Large bulk supplies are good for a finished design, but not the best for
> debugging.
>
> -Dave
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