untitled

For a brighter light, try using an LED with a clear glass shell instead of a

translucent shell.

LED2provides a steady light.

We chose yellow, as if you had a candle in the pumpkin.

R4is a resistor that limits the current running through LED2 to approxi-

mately 20 milliamps.

20

21

14

15

28

12

27

19

26

13

17

16

+

MIC

S 1

6V

SPEAKER

C 1

R1

R2 C 2

C 3

R3

IC 1

+

S 2

23

IR DETECTOR

LED1

R4

LED2

Figure 9-4:

The

schematic

of the

talking

pumpkin

circuit.

192 Part III: Let There Be Light