Long_duration_timer_that_uses_a_PUT

Published:2009/7/22 4:08:00 Author:Jessie | From:SeekIC

This circuit shows a PUT that is used as a long-duration (up to about 20 minutes) timer. The circuit is similar to that of Fig. 9-20. However, the PUT is superior to the UJT in long-duration timers because the PUT has a lower peak-point firing current (making it possible to charge the capacitor over a longer time).



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