Data Sheet

-25-
19. Lamp, LED, and Motor Series
Connection
In this series connection, you will nd that the
LED (70) will light and the motor (95) will
spin, but the lamp (76) is off. If the motor
(95) does not spin, you may need to get it
started by spinning the shaft with your nger.
The lamp (76) is off because the voltage drop
across the LED (70) and motor (at least 1.5
volts) reduces the voltage across the lamp
(76), thus limiting the current through the
lamp (76), preventing it from lighting.
20. Switch-controlled Lamp, LED
& Motor Series/Parallel
Connection
Build the circuit, you will nd that the
motor (95) spins, the LED (70) lights, and
the lamp (76) lights dimly. The lamp (76)
is dim because it is connected with the
LED (70) in a series circuit, and thus the
voltage drop across the LED (70) (at least
1.5 volts) limits the current through the
lamp (76), too low to light up the lamp
(76).
2nd level
2nd level
EBX120_Manual_042817 5/17/2017 10:54 AM Page 26