derik Posted July 3, 2005 Report Share Posted July 3, 2005 Hello every body.I have to design a circuit which when turned on runs a fan for 5 minutes then shuts off.it's not a cyclic operation,starts only when Quote Link to comment Share on other sites More sharing options...
audioguru Posted July 4, 2005 Report Share Posted July 4, 2005 The CD4541 timer already has an oscillator and a divide by 256 to 65,536 counter built in. Quote Link to comment Share on other sites More sharing options...
audioguru Posted July 5, 2005 Report Share Posted July 5, 2005 The CD4541 is perfect for this 5 minutes run time application. Just select the divider and calculate an oscillator frequency. The oscillator's frequency can be varied quite a lot with a pot, to make a variable-time timer. ;D Quote Link to comment Share on other sites More sharing options...
audioguru Posted July 5, 2005 Report Share Posted July 5, 2005 Maybe a moderator could correct this topic's erroneous spelling. A CD4511 is a 7-segment driver, not this CD4541 timer. :( Quote Link to comment Share on other sites More sharing options...
audioguru Posted July 5, 2005 Report Share Posted July 5, 2005 With a long timer project you simply adjust the time of a shorter count sequence, then multiply it by the remaining counter stages. ;D Quote Link to comment Share on other sites More sharing options...
MP Posted July 8, 2005 Report Share Posted July 8, 2005 Maybe a moderator could correct this topic's erroneous spelling. A CD4511 is a 7-segment driver, not this CD4541 timer. :(I have corrected the topic, but the subject lines in your old posts will reflect the original.MP Quote Link to comment Share on other sites More sharing options...
audioguru Posted July 8, 2005 Report Share Posted July 8, 2005 I have corrected the topic, but the subject lines in your old posts will reflect the original.MPThanks, MP ;D Quote Link to comment Share on other sites More sharing options...
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