One Minute TTL Timer (CB1273E)

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Published: Sunday, 04 November 2018 21:29

Written by Newton C. Braga

    We found this configuration in an old 1970s American documentation. The circuit may use equivalent transistors such as the BC548 and should be powered by 5V voltage sources. The capacitor can be changed for other time intervals. Logical Equivalent of MC724 should be used.