The 555 timer IC is without doubt one of the most important and widely used single ICs in history. The design has remained unchanged for over 40 years, which makes it one of the longest running IC designs. It's been used in everything from toys to spacecraft.The 555 was originally designed in 1971 b...By: brmarcum
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from Instructables: exploring - technology - robots http://ift.tt/1vajF0o
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