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== Assignment 2: switches== | == Assignment 2: switches== | ||
'''switch, relay, motor''' 2 contact/ momentary switches,relay,555 timer, trash | |||
<videoflash type="vimeo">136196422|400|265</videoflash> | |||
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 | |||
[[File:555_astable_2_small.jpg]] | |||
Revision as of 13:38, 2 September 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.
<videoflash type="vimeo">134547338|400|265</videoflash>
<videoflash type="vimeo">134555309|400|265</videoflash>
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
Assignment 2: switches
switch, relay, motor 2 contact/ momentary switches,relay,555 timer, trash
<videoflash type="vimeo">136196422|400|265</videoflash>
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