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CdS Controlled I.C. Oscillator
BA306

This project is a circuit which uses the IC (integrated circuit) as an oscillator. The tone of this oscillator varies with the amount of light hitting the CdS. Try changing the tone by moving your hand over the CdS. Operation is virtually the same as that of project Light Controlled Burglar Alarm in Oscillator Section.

Can you locate the circuit differences?

You will want to compare the two circuits and try other changes as well. Do not use values less than 1K in this circuit, or you may damage the IC. You may try every Capacitor without fear of damage. Have fun!

Record any interesting results in the space below, so you can repeat them later for your friends.

 

 

 

 

 

 

 

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