28123 Parallax Inc, 28123 Datasheet - Page 212
![TEXT WHAT'S A MICROCONTROLLER](/photos/6/49/64955/mfg_28123_sml.jpg)
28123
Manufacturer Part Number
28123
Description
TEXT WHAT'S A MICROCONTROLLER
Manufacturer
Parallax Inc
Type
Programmingr
Datasheet
1.28123.pdf
(340 pages)
Specifications of 28123
Style
Book
Title
What's a Microcontroller?
Contents
Whats a Microcontroller? Text
Product
Microcontroller Accessories
Core Processor
PIC16C57c
Flash
128 Bytes
Operating Supply Voltage
9 V
Board Size
31 mm x 16 mm
Lead Free Status / RoHS Status
Not applicable / Not applicable
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Page 204 · What’s a Microcontroller?
Light Meter Parts
(1) Photoresistor
(1) Resistor – 220 Ω (red-red-brown)
(1) Capacitor – 0.01 µF
(1) Capacitor – 0.1 µF
(1) 7-segment LED display
(8) Resistors – 1 kΩ (brown-black-red)
(6) Jumper wires
Building the Light Meter Circuit
Figure 7-9 shows the 7-segment LED display and photoresistor circuit schematics that
will be used to make the light meter, and Figure 7-10 shows a wiring diagram of the
circuit. The photoresistor circuit is the same one you have been using in the last two
activities, and the 7-segment LED display circuit is the one that was controlled by the
BASIC Stamp in Chapter #6.
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