/diy/ - Do It Yourself

Anonymous Thu Jul 13 07:19:59 2017 No.1208547 [View]
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>>1208512
I made some tests out of curiosity. I used >>1207494's circuit with 1.5n capacitor, 10M (scope probe) pull-down resistor (resulting in 15ms time constant) and some Tyco's snap action switch. Pic related, 3 button presses. Of these, the green curve was the most typical, maybe 3 out of 4 presses. The heavy ringing is a result of rather long (uncut) capacitor leads.

>I hate SMDs for being so obscure.
Yeah. There are device marking tables, like http://caxapa.ru/thumbs/588912/smd-codes.pdf, but they're incomplete and full of duplicates.
Anyway, at least "U2" suggest it's an IC and all the 3 pins seem to be connected. It wouldn't be a huge surprise if it actually was compatible with TL431.

>>1208520
Why did you bother with such trash-tier processor to begin with?

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/diy/ - Do It Yourself

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