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No CPU / MCU led pulse-fade

Step 3Mode 1, fade in fade out

There is one drawback to this mode, if the capacitor is completely empty it will take a little bit extra time for it to fill up enough to not be a short circuit

once its going, it should stabilize out mostly, this is fine if you are sending it a square wave, but for push button applications it may seem a bit delayed at first,  since the second transistor never fully discharges the capacitor unless left for a decent amount of time

see the attached video for the results
PDR_0005.AVI(320x240) 2 MB
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Author:osgeld