Originally posted by twalters
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I was going to order from them but they have some issues with shipping to Canada. 14 gauge wire is $11 plus shipping. I didn't request analysis report but they should be able to provide such. One advice; when sourcing silver never mention what you're going to use it for. Some people may freak and refuse to deal with you. I would try to get grain of wheat bulb. LED alone will not work the same way.
You can use this simple circuit below as constant current supply. 1.2k resistor can be adjusted for uA output range. I tried and it works fine. 2N2222, BC547 or similar.
Regards
Vtech
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