6_30_V_AT_500_mA

Published:2009/7/17 4:40:00 Author:Jessie | From:SeekIC

Zener used for CR1 should be rated 1 V less than desired minimum voltage, at 300 mW. R1 improves regulation at low cur rent levels. Current-limiting value is about 1 A. Diodes are 50-PIV 1-A silicon. I1 is 117-V neon lamp, Q1 is any 15-W NPN power transistor. Q2 is 2N697 or equivalent. T1 is power transformer with 24-V secondary at 0.5 A.-J. Huffman, The Li'I Zapper-a Versatile Low Voltage Supply, CQ, Nov. 1977, p 44.



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