Manual Part 2

43
50mA
Project 31 | 3-WALL HOUSE
The circuit built in this project is
pictured on the front of your box
and manual, so you can use that
picture as a guide here.
This circuit represents the di󰀨erent
uses of electricity in your home
and the electrical circuitry that
carries that electricity and makes it
work for you.
The motor is a ceiling fan. The
white LED is a ceiling light. The
press switch is the doorbell, which
controls the melody IC as well as
the lamp that lights up the room
when someone is at the door. The
phototransistor and color LED light
up when it becomes dark outside.
The 470µF capacitor (C5) adds
a delay, so the color LED stays
illuminated for a short time after
you turn the switch o󰀨.