28129 Parallax Inc, 28129 Datasheet - Page 147
![TEXT BASIC ANALOG & DIGITAL](/photos/6/49/64954/mfg_28129_sml.jpg)
28129
Manufacturer Part Number
28129
Description
TEXT BASIC ANALOG & DIGITAL
Manufacturer
Parallax Inc
Type
Programmingr
Datasheet
1.28129.pdf
(176 pages)
Specifications of 28129
Style
Book
Title
Basic Analog and Digital
Contents
Basic Analog and Digital Text
Product
Microcontroller Accessories
Lead Free Status / RoHS Status
Not applicable / Not applicable
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What have I learned?
On the lines below, insert the appropriate words from the list on the left.
entire
analog
RC
buffer
voltage
divider
high
capacitor
The BASIC Stamp has a built in feature for D/A conversion that uses
pulse width modulation. The technique uses a series of pulses to charge
the capacitor in an __________ circuit to the desired voltage. PWM relies
on the duty, which is different from duty cycle, to control the voltage the
capacitor is charged to. Duty refers to a series of pulses instead of a single
cycle. It's the total amount of time the signal is __________ divided by
the total amount of time for the __________ pulse train.
it, the __________ will quickly loose its charge. A capacitor also looses
its charge due to leakage current, so the PWM should be repeated
periodically to refresh the voltage.
A photoresistor is a device whose resistance value changes with the
brightness of light that shines on a collecting surface. The photoresistor or
any resistor whose value changes with some analog value can be used in a
__________ and the result is a variable voltage output. This information
can be interpreted using the ADC0831 and the BASIC Stamp to measure
the __________ voltage output.
A __________ is essential for this circuit when driving a load. Without
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