DIYbio:Notebook/Open Gel Box 2.0/Power Supply

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What we need: clean, stable, variable DC at 20V-100V, adjustable (possibly up to 600V).
What we need: clean, stable, variable DC at 20V-100V, adjustable (possibly up to 600V).
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Consider: using a cheap computer ATX supply feeding a voltage regulator such as an LM317 feeding a DC/DC step-up built on the model introduced in http://www.edn.com/contents/images/70804di.pdf (from http://www.edn.com/article/CA431146.html ).
 
 
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For $10-$20 , you get plenty of overhead (i.e. 400W max neighborhood), 50/60Hz and 110/220V independence, amp draw regulation (probably?  not sure what typical protection is in the low price range), and handy plug-in molex connectors.  The last point is particularly salient, if you can power more than one device with a versatile power supply.
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I do not know how adding a voltage regulator (LM317 etc) and DC/DC step-ups after these affect their voltage regulating properties.
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Converting a computer ATX power supply to a really useful lab power supply
Converting a computer ATX power supply to a really useful lab power supply
http://www.instructables.com/id/Converting-a-computer-ATX-power-supply-to-a-really/
http://www.instructables.com/id/Converting-a-computer-ATX-power-supply-to-a-really/

Revision as of 01:41, 7 January 2009

Jan 06, 2009

What we need: clean, stable, variable DC at 20V-100V, adjustable (possibly up to 600V).

Consider: using a cheap computer ATX supply feeding a voltage regulator such as an LM317 feeding a DC/DC step-up built on the model introduced in http://www.edn.com/contents/images/70804di.pdf (from http://www.edn.com/article/CA431146.html ).

For $10-$20 , you get plenty of overhead (i.e. 400W max neighborhood), 50/60Hz and 110/220V independence, amp draw regulation (probably? not sure what typical protection is in the low price range), and handy plug-in molex connectors. The last point is particularly salient, if you can power more than one device with a versatile power supply.

I do not know how adding a voltage regulator (LM317 etc) and DC/DC step-ups after these affect their voltage regulating properties.

Converting a computer ATX power supply to a really useful lab power supply http://www.instructables.com/id/Converting-a-computer-ATX-power-supply-to-a-really/

How to Add Variable Voltage to Your ATX Based Bench Power Supply http://www.wikihow.com/Add-Variable-Voltage-to-Your-ATX-Based-Bench-Power-Supply

Building a Power Supply http://www.eleinmec.com/article.asp?16

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