28128 Parallax Inc, 28128 Datasheet - Page 118
28128
Manufacturer Part Number
28128
Description
KIT BASIC ANALOG/DIGI PARTS ONLY
Manufacturer
Parallax Inc
Datasheet
1.28129.pdf
(176 pages)
Specifications of 28128
Accessory Type
ADC, DAC
Product
Microcontroller Accessories
For Use With/related Products
BASIC Stamp® 2 and Board of Education
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Figure 6-2 shows the circuit symbol and part drawing for the 0.1 µF capacitor from the
Analog and Digital Parts Kit. Unlike the electrolytic capacitors, this ceramic capacitor
has no polarity. In other words, it doesn't matter which terminal receives the higher
voltage level. There's also no + and – terminals, and the shape of the circuit symbol is
slightly different.
Figure 6-3 shows the symbol and pin map for the 555 timer. As with the ADC0831, the
circuit symbol for the 555 timer is drawn for convenience in the circuit diagram. This
means that the locations of the pins on the symbol and its size may change from one
diagram to the next. The pin map, on the other hand, does not change. Make sure to
locate the index mark, and use the pin map in conjunction with the schematic while
wiring your circuits.
The electrolytic capacitor has a positive (+) and a negative (-) terminal. The negative
terminal is the lead that comes out of the metal canister closest to the stripe with a negative
(–) sign. Always make sure to connect these terminals as shown in the circuit diagrams.
Connecting one of these capacitors incorrectly can damage it. In some circuits, connecting
this type of capacitor incorrectly and then connecting power can cause it to rupture or even
explode.
1µF
0.1 µF
Figure 6-2
A 0.1 Micro Farad
capacitor
There is no polarity
on this capacitor.
Figure 6-1
Electrolytic Capacitor
Circuit Symbol and
Component
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