Project #89, Light-controlled led (ii), Project #91 – Elenco Projects 1-101 User Manual
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Project #89
OBJECTIVE: Build a circuit that turns an LED on and off if
there is light present.
When there is light on the photoresistor (RP), the LED (D1) will flicker.
Shield the photoresistor from the light, the LED should turn off.
Light-Controlled LED (II)
OBJECTIVE: Build a circuit that turns on and off an LED using
the whistle chip.
Project #91
Use the circuit from Project 89. Replace the photoresistor (RP) with the
whistle chip (WC). Tap on the whistle chip and the LED (D1) flickers. Tap
again and the LED may flicker for a longer time. See how long the LED will
stay on.
Project #90
Touch Light
OBJECTIVE: Build a circuit plays sound if you tap on the whistle
chip.
Use the circuit from Project #90. Replace the LED (D1) with the speaker
(SP). Now you can hear the different sound as you tap on the whistle chip
(WC).
Touch Sound