This is the tone changing speaker. It relies on a 555timer and a variable resistor. It gives you a very funky sound but it has to be manually operated. Components: In this project, you will be needing:1x Breadboard1x 9v battery connector1x speaker1x 555 timer1x 100uf Capacitor1x 0.022uf Capacito...By: Nawielectron
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from Instructables: exploring https://ift.tt/2wiua8I
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