For my next project I've just built a PSU using a small
9V-transformer. Hooking it up to a Graetz-bridge for rectification, I
measure 9.5 volts over Vcc/GND using my DMM.

Now I'm going to add filter caps. What I'm unsure of here is if
10v-ratings will work, or if 0.5 volts is a way too small safety
margin. I have big (~4000uF) 10v-caps in my junkbox, and since the
junkbox serve a purpose (using older but working components) I feel
that I want to pick those instead of new 16v-rated caps instead.

So, will 10v-ratings work or will it be a too narrow margin?

The PSU will be connected to a 7805, so I'm not expecting too much
variations (except for perhaps inferior) in the voltage.


-- 
- Rikard - http://bos.hack.org/cv/
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