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Author Topic: 555 Timer  (Read 1262 times)

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eastnewyork4487

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555 Timer
« on: June 27, 2010, 02:53:48 AM »
I need help. My output from the second 555 circuit should have a pulse width of 15 seconds and how long it stays high and low in the duty cycle depends on the voltage control input at pin 5 of the second 555. When i aplly more than 3.87v to pin 5 my output pulse width extends to 30 seconds. Any ideas of what im doing wrong. feel free to e-mail me at eastnewyork4487@aol.com