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dsPICDEM 2 Development Board User’s Guide
2.4.3
Observe Sample Application
To run and observe the sample application follow these steps:
1. Plug the 9 VDC cable into the DC IN connector (J4). The PWR ON indicator
should illuminate.
2. Press the RESET ALL pushbutton (S1). The LCD displays the current tempera-
ture and voltage values, which represent the A/D conversions from the tempera-
ture sensor and potentiometer, respectively.
dsPICDEM ? 2 Board
T=+18C Pot=3.42v
The LED indicators (D3 and D4) should initially be off and then start to blink.
3. Touch the temperature sensor for a moment and observe the temperature read-
ing. It should increase as your finger warms the sensor.
4. Adjust the potentiometer clockwise and observe the voltage reading increase.
Then readjust it counterclockwise and observe the voltage reading decrease.
5. Observe the HyperTerminal screen and note that the information is updated to
match the LCD (see Figure 2-3).
FIGURE 2-3:
TYPICAL HyperTerminal ? SESSION
6. Press pushbutton S5 (INT0) once and note that the rate at which D3 and D4 blink
changes. As you press S5 again, observe that the blink rate cycles from
extremely fast (both LEDs appear to be on) to fast (blinking rapidly) to moderate
(blinking slowly) to slow (appear to be switching on and off).
7. Press pushbutton S6 (INT1) once and note that D3 and D4 blink alternately. As
you press S6 again, note the LEDs cycle between blinking together and blinking
alternately.
DS51558A-page 16
? 2005 Microchip Technology Inc.
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