beautypg.com

Project pc6, Noisy blinker pc – Elenco PK101 w/ Computer Interface User Manual

Page 21

background image

+9V

100k

1k

3.3k

470

S

P

473

502

Project PC6

OBJECTIVE: To demonstrate wait mode with multiple colors.

Noisy Blinker PC

Build the circuit shown. If continuing from the previous experiment then close the Winscope program
and run it again, to reset the settings. Click on the On-Line button to activate, and press the switch. Set
Winscope to the settings shown below, and move the the variable resistor knob around to change the
waveform and the sound. A sample waveform is shown here, but the pattern and shape of the pulses
depends on the variable resistor setting.

-21-

SPEAKER