DIY Musical Pen with 555 Chip

Musical pen that produce crazy sounds genereated by brain 555 chip,photo resistor and white led.

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For schematic visit here: http://hackaweek.com/hacks/?p=699

DIY Musical Pen with 555 Chip life hacks for men
380 Likes	380 Dislikes
16,305 views views	1.34M followers
Science & Technology	Upload TimePublished on 12 Feb 2018

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