±5_AND±12_V_FOR_COMPUTER

Published:2009/7/19 21:20:00 Author:Jessie | From:SeekIC

Provides all voltages required for 8080-4BD microcomputer system marketed by The Digital Group (Denver, CO). Transformer for positive supplies is 6.3-V 20-A unit with secondary replaced by two new windings giving required voltage and current. Crowbar circuit using 2N688 SCR protects ICs in memory and CPU. Use of at feast 50,000 μF in filter of 5-V supply prevents noise problems in computer MPC-1000 5-V 10-A regulator should be mounted on large heatsink at rear of computer housing in open air.- L.I. Hutton, A Ham's Computer, 73 Magazine, Dec. 1976, p78-79 and 82-83.



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