nwaste Posted August 19, 2005 Report Share Posted August 19, 2005 I have made a electronic door locker and opener and i need a delay timer for the opener for about 5-10 seconds. timer will be operated by the REGULAR SWITCH ON-OFF (NOT TASTER) which be pressed about 10 times a day, that mean i need delay timer which respond when i turn the switch ON it should power on relay and starts to counting, and when the time is up it should power off the relay and wait to i turn it off and on (same process, over and over...).plEase hElp!!P.S.i made standard delay timer but it have to be starts by taster and realased immidietly! (only when the taster is realased he starts to count) Quote Link to comment Share on other sites More sharing options...
waferstar Posted August 19, 2005 Report Share Posted August 19, 2005 I think you can use a 555 as the Quote Link to comment Share on other sites More sharing options...
audioguru Posted August 19, 2005 Report Share Posted August 19, 2005 Just use a coupling capacitor in series with the trigger switch so that it gives a short trigger pulse no matter how long you hold down the switch. If the 555 timer's pin 2's pull-up resistor is 10k then use a 0.1uF coupling cap. ;D Quote Link to comment Share on other sites More sharing options...
nwaste Posted August 19, 2005 Author Report Share Posted August 19, 2005 This advice with the capacitor and 555; is that one circuit (capacitor in circuit with 555) or is that two independent circuit (or capacitor or 555). Dont laugh on my messages cuz my english is so bad especially this kind of it. Quote Link to comment Share on other sites More sharing options...
waferstar Posted August 19, 2005 Report Share Posted August 19, 2005 Of course that is on one PCB circuit.------------------------------------------------------------------------My Service:Extract the software for you from the MCUSpring Liu/Export DepartmentTel:+86-21-58314916Fax:+86-21-58314812Wafer Microelectronics Co.,Ltdwww.waferstar.com Quote Link to comment Share on other sites More sharing options...
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