28122 Parallax Inc, 28122 Datasheet - Page 154
![KIT WHAT'S A MICRO:PARTS ONLY](/photos/26/89/268994/28122-l_sml.jpg)
28122
Manufacturer Part Number
28122
Description
KIT WHAT'S A MICRO:PARTS ONLY
Manufacturer
Parallax Inc
Datasheet
1.28123.pdf
(340 pages)
Specifications of 28122
Accessory Type
Parts Kit
Product
Microcontroller Accessories
Core Processor
PIC16C57c
Flash
128 Bytes
Operating Supply Voltage
9 V
Board Size
31 mm x 16 mm
For Use With/related Products
Board of Education Full Kit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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' What's a Microcontroller - PolledRcTimer.bs2
' Reaction timer program modified to track an RC-time voltage decay.
' {$STAMP BS2}
' {$PBASIC 2.5}
timeCounter
counter
DEBUG CLS
HIGH 7
DEBUG "Capacitor Charging...", CR
FOR counter = 5 TO 0
NEXT
DEBUG CR, CR, "Measure decay time now!", CR, CR
INPUT 7
DO
PAUSE 1000
DEBUG DEC2 counter, CR, CRSRUP
PAUSE 100
timeCounter = timeCounter + 1
√
√
√
√
√
√
Record the measured time (the capacitor’s discharge time) in the 470 Ω row of
Table 5-1.
Disconnect power from your Board of Education or BASIC Stamp HomeWork
Board.
Remove the 470 Ω resistor labeled R
145, and replace it with the 1 kΩ resistor.
Reconnect power to your board.
Record your next time measurement (for the 1 kΩ resistor).
Repeat these steps for each resistor value in Table 5-1.
VAR
VAR
Table 5-1: Resistance and RC-time for C = 3300 µF
Resistance (Ω)
Word
Nib
10 k
470
1 k
2 k
Measured Time (s)
i
in Figure 5-8 and Figure 5-9 on page
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