Here is page on current limiter diodes which gives part number and rating for any who want to make a constant current CS generator. These are standard part numbers to look up from a electronic source. Bob
http://www.semtexinternational.com/SDiv/SPL/CRD/crd.html <http://www.semtexinternational.com/SDiv/SPL/CRD/crd.html>
