User:Anna Pfannstiel

32 editsJoined 29 July 2015

Introduction to Electronics

Assignment 1: variable resistance and conductivity

555 timer in astable mode with speaker and different conductive materials

Current flows through the 555 timer circuit and the attached conductive material, which creates square wave oscillations that are output on a speaker.


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By changing conductive material(water, metal..), you change the resistance and the pitch of the tone.

schematic for 555 timer in astable mode with speaker and different conductive materials

555 astable 2 small.jpg

Assignment 2: switch