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For 74HC139 Click Here
the 74HC283 can be used with either all active HIGH operands (positive logic) or all active LOW operands (negative logic)
The module can used easily for realtime tracking applications
Operating voltage: 5V
This board breaks out all 20 pins of the XBee to a 0
Line Tracker Module (3 Channels) Thermoelectric Cooler For 74HC139 Click HereThis Line Tracker sensor consists of 3 IR transmitter and IR receiver pairs. This tracker sensor is typically used for robots in line following task. It can be used for either dark or bright line following. The tracker sensor have 3 digital outputs to user indicating the existence of the line. Every sensor is provided with its own LEDs as indication of line detection. Features Operating voltage 5V Output low black line, a white line output high
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