Manual

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3. LED, the Check Valve Light
Build the circuit to the left making sure the
LED (69) is in the correct direction. Press
the switch (62) to turn it ON and OFF.
Reverse the LED (69) and repeat. Notice that the
LED does not light when in the circuit in the reverse
direction, demonstrating how LEDs only allow
current to ow in one direction.
4. Magnetic Switch
Build the circuit on the left. Put the magnet (7) near
the reed switch (83) and the lamp (76) will turn ON.
Move the magnet (7) away, and the lamp (76) will
turn OFF. This is a “no touch” switch!