27220 Parallax Inc, 27220 Datasheet - Page 136
27220
Manufacturer Part Number
27220
Description
BOOK STAMPWORKS
Manufacturer
Parallax Inc
Datasheet
1.27220.pdf
(230 pages)
Specifications of 27220
Accessory Type
Booklet
Product
Microcontroller Accessories
Lead Free Status / RoHS Status
Not applicable / Not applicable
For Use With/related Products
StampWorks
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Not applicable / Not applicable
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Page 126 · StampWorks
EXPERIMENT #22: ANALOG OUTPUT WITH PWM
This experiment demonstrates the creation of a stable analog output voltage using
PWM and an off-the-shelf op-amp.
Look It Up: PBASIC Elements to Know
•
PWM
Building the Circuit
Note: The 10 kΩ resistor is marked: brown-black-orange.
The LM358 requires at least 6.5 volts on its Vcc pin (8) to provide a five-volt output
from PWM. By using the PDB’s Vin connection (near the RS-232 DCE port) and a 12-
volt power supply, this requirement is satisfied.
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