27220 Parallax Inc, 27220 Datasheet - Page 183
![BOOK STAMPWORKS](/photos/8/99/89963/mfg_27220_sml.jpg)
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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EXPERIMENT #31: ADVANCED 7-SEGMENT MULTIPLEXING
This experiment demonstrates the use of 7-segment displays with an external
multiplexing controller. Multi-digit seven-segment displays are frequently used on
vending machines to display the amount of money entered.
Building the Circuit
Connect four pushbuttons to P4-P7 (see Experiment #14) and add the multiplexing
circuit below.
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