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Long-duration timer

Based on a Labs project | October 2011 | Find it here
Long-duration timer
The timer, based on EXAR'S Type XR2240, is intended for use in photographie and printed-circuit departments, as a standby switch for 1 V and radio equipment. as a battery charging monitor, and similar applications. The timing can be set between 15 minutes and 24 hours 45 minutes with two BCD (binary coded decimal) switches.
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