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== Assignment 1: variable resistance and conductivity== | == Assignment 1: variable resistance and conductivity== | ||
'''material:''' 555 timer, capacator, resistor, speaker and different conductive material | '''material:''' 555 timer, capacator, resistor, LED, speaker and different conductive material | ||
Current flows through the circuit, 555 timer in astable mode and the attached conductive material, which creates square wave oscillations that are output on a speaker. | Current flows through the circuit, 555 timer in astable mode and the attached conductive material, which creates square wave oscillations that are output on a speaker. | ||