20
Build the circuit shown. Use the switcher (
S6
) to control the light.
Modify the preceding circuit to be this one. Use the switcher (
S6
) to control light, sound, and motion.
The melody IC (
U32
) only works in one direction.
You can replace any of the motor (
M4
), red/yellow LED (
D10
), or melody IC with the color LED (
D8
),
clock (
T2
), or geared motor (GM).
The switcher (
S6
) is actually a complex
switch used to reverse the wires to a
component or circuit. Its connections
look like this:
PROJECT 16
• Reverser
PROJECT 17
• Super Reverser
See project 3 if you need to recharge the battery (
B4
).
See project 3 if you need to recharge the battery (
B4
).