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3 LEDS, 1 button for 4 activations

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crutschow

crutschow

Joined Mar 14, 2008
38,526
AnalogKid said:
Do you really think this makes a difference?

1. What is the voltage waveform on pin 1 with D1?
2. What is the voltage waveform on pin 1 without D1?

With or without D1, pin 1 sees the came capacitance. As long as (Vcc - Vf) is greater than the positive peak voltage at pin 1, U1 doesn't care.
Click to expand...
But U1 does care.
See below for the results for your questions 1. and 2..

1649529352607.png
 
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