I got some new TI 555s and had to use 100uf for C3, but only the first press has a delay. You press it the 1st time and it stays on for 3 sec, but any press after that and it’s instantaneous again. You have to dissconnect the power and reconnect, and it does the 1st press delay and 2nd instantaneous again. I tried holding the button on longer, to maybe charge the cap, but it makes no difference.
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