[DIYbio] Re: [dorkbotpdx-blabber] Can't find supplier for ~1 inch Viton stopper

On Fri, Aug 29, 2014 at 1:05 PM, Jerry Biehler <jerry.biehler@gmail.com> wrote:
> It will leak. I guarantee it. If not you will have a virtual leak. Vacuum
> design is not easy, especially at this level.

Hmm, alright, I have been trying to be careful! Glad I haven't cut
into the blocking-plate yet!

> I have a couple small 3 pin feedthroughs you can have. What kind of voltage
> are you working with? Current?

I think 30V max, not sure of current but the first-application-attempt
is a photodiode in reverse-bias mode, buffered by a MOSFET. These
parts:
BPW34
http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_1621132_-1
2N7000
http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_178669_-1

and the schematic (I'm planning on only having the 'light shield'
section in the vacuum, maybe only the photodiode, 10M, and
2N7000)(don't mind the BPW34 being mislabelled on the image):
http://imgur.com/ozKQkUj

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