122-28176 Parallax Inc, 122-28176 Datasheet - Page 180

• Manufacturer Part Number: 122-28176
• Description: GUIDE STUDENT PROCESS CONTROL
• Manufacturer: Parallax Inc

Specifications of 122-28176

• Accessory Type: Manual
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: Propeller Education (PE) Kit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

ADDITIONAL DEVICES OF INTEREST
While we won't test these circuits and devices, they are worth discussing.
Darlington-Pair Drivers
Just as a Darlington-pair may be used to detect small signals, as explored with the opto-
reflective switch, they may also be used as high current drives. The ULN2003A shown
in Figure 5-22 is a popular device in that it contains seven drivers, each capable of
sinking 500 mA at 50 V.
Figure 5-22
Example ULN2003A
High Current Driver