BATTERY_BACKUP

Published:2009/7/1 2:49:00 Author:May | From:SeekIC

During normal operation, all power for dighal clock is provided by AC power supply. During power failure, clock con tinues operating from battery backup using two 9-V batteries in series. Battery drain is limited by diode CR2 that blocks power flow to displays. Optional switch may be installed across diode to short it for momentary viewing of display.-W. J. Prudhomme, CTT001 Clockbuster, 73 Magazine, Dec. 1976, p 52-54 and 56-58.



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