eplanet Posted February 24, 2013 Report Share Posted February 24, 2013 Hello dear friendcould you help me for designing a LED blinker with two properties:5 seconds LED on and 2 seconds LED off and repeat.how can i calculate space time and mark time for these R1 , R2, C1 for making 5 and 2 seconds? Quote Link to comment Share on other sites More sharing options...
audioguru Posted February 24, 2013 Report Share Posted February 24, 2013 Didn't you look at the datasheet?It shows how to simply calculate the charge resistors, the discharge resistor and the capacitor. Quote Link to comment Share on other sites More sharing options...
eplanet Posted February 24, 2013 Author Report Share Posted February 24, 2013 yes absolutely but i have only time for on/off and haven't any parameters like resistors and capacitor for using formulas.i think i should revers working. because when you have resistors and capacitor you can use 555 calculator for result.and result are space and mark time Quote Link to comment Share on other sites More sharing options...
Hero999 Posted February 26, 2013 Report Share Posted February 26, 2013 The LED should be wired from pin 3 to 0V in order to have a duty cycle of greater than 50%. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.