MEMORY_SAVER

Published:2009/7/5 20:16:00 Author:May | From:SeekIC

Standby battery takes over automatically during power failure to prevent memory loss. Use any rechargeable battery that can handle load. Connect one LM340-5 regulator in circuitfor each 1.2A of load current drawn by circuits to beprotected. In normal operation, output diodes are biased off by slightly higher voltage from computer. During power failure,they are switched on by removal of bias. Current is then supplied by battery. Output should be loaded with resistor drawing ahout hatf of trickle-charge current, so battery has small continuous current flow and stays charged.-C. R.Carpenter, Protect Your Memory Against Power Failure, Kilobaud, March 1978, p 73.



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