28122 Parallax Inc, 28122 Datasheet - Page 324
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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BONUS ACTIVITY: OHMS LAW, VOLTAGE, AND CURRENT
This activity applies some of the definitions just discussed.
Ohm’s Law Parts
(1) Resistor – 220 Ω (red-red-brown)
(1) Resistor – 470 Ω (yellow-violet-brown)
(1) Resistor – 1 kΩ (brown-black-red)
(1) Resistor – 2 kΩ (red-black-red)
(1) LED – any color
Test Circuit
The resistance value of R
current through the LED, and it glows more brightly. Higher resistance values will cause
the LED to look dim because they do not allow as much current to pass through the
circuit.
√
√
√
√
Disconnect power to your Board of Education or HomeWork Board whenever
you modify the circuit.
Build the circuit shown starting with a 220 Ω resistor.
Modify the circuit by replacing the 220 Ω resistor with a 470 Ω resistor. Was
the LED less bright?
Repeat using the 1 kΩ resistor, then the 2 kΩ resistor, checking the change in
brightness each time.
i
in Figure F-1 can be changed. Lower resistance allows more
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