555 Timer Circuits(555-timer-circuits.com)21 ポイント·投稿者 _Microft·4 年前·2 コメント555-timer-circuits.com555 Timer Circuitshttps://www.555-timer-circuits.com/2 コメントコメントを投稿[–]IRP·4 年前返信Didn't know this circuit was still around. Good memories. And fun projects![–]gecko_·4 年前返信If you browse hackaday.com (a hardware tinkerer site), a running gag is "could have been done with a 555 timer though".