28122 Parallax Inc, 28122 Datasheet - Page 222

• Manufacturer Part Number: 28122
• Description: KIT WHAT'S A MICRO:PARTS ONLY
• Manufacturer: Parallax Inc

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

You can also make the display cycle at one tenth the speed by swapping the 0.01µF
capacitor for the 0.1 µF capacitor. Remember that when you use a capacitor that is ten
times as large, the RC-time measurement will become ten times as long.
√
√
√
√
to
in the
Run the modified program and test to make sure the cycling of the 7-segment
LED display is now one tenth of what it was before.
You can also try multiplying the
or dividing by 2 using
Replace the 0.01 µF capacitor with a 0.1 µF capacitor.
Run the program and see if the predicted effect occurred.
Which is better, adjusting the software or the hardware? You should always try to use
the best of both worlds. Pick a capacitor that gives you the most accurate measurements
over the widest range of light levels. Once your hardware is the best it can be, use the
software to automatically adjust the light meter so that it works well for the user, both indoors
and outdoors. This takes a considerable amount of testing and refinement, but that’s all part
of the product design process.
Delay
PAUSE time
PAUSE time * 10
subroutine.
PAUSE time / 2
time
variable by other values such as 5 or 20,
.