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555 Timer DC Protect / Turn-On Delay
555 Timer DC Protect / Turn-On Delay
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Old 12th July 2019, 09:27 AM   #41
Mark Tillotson is offline Mark Tillotson
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Its worth noting that modern CMOS versions of the 555 are better, and in particular don't have large shoot-through current spikes from the output pin driver (the old 555's need about 100uF decoupling to tame this 400mA glitch, CMOS chips like the 7555 are happy on the standard 100nF decoupling.
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Old 12th July 2019, 01:38 PM   #42
Mark Johnson is offline Mark Johnson  United States
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555 Timer DC Protect / Turn-On Delay
CMOS 555s swing rail to rail so the astable multivibrator circuit (aka square wave oscillator) needs only a single R and a single C and yet its timing is more precise than the 2R+1C circuit everyone copies from the 555 datasheet.
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