Share Playing He’s a pirate with 555 timer piano04:33 0 Share 0 Likes 0 Dislikes Published on March 26, 2017 This is 555 timer oscillator circuit. Pencil contact is modifying pin6-pin7 resistor. Category: #Video Submitted by: Admin Tags:555, Hes, Piano, Pirate, Playing, Timer About The Author Admin Related Posts