Keywish Hummer-Bot-2.0 Instruction Manual page 59

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The working voltage: 3.3V-5V
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Using wide voltage comparator 74HC14D, digital output (0 and 1)
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Easy-to-install fixed bolt holes
Detailed parameters please refer to "hummer-bot\Document\ TCRT5000.pdf"
Note：
Correct wiring! The mainboard and electronic device may burn up if you have reverse connection
between positive and negative poles. Connecting the VCC to 3.3V or 5V, the OUT output port to the
microcontroller IO port directly. The I/O port on Arduino should be set for input mode / receiving mode,
otherwise it can't be used. As for other MCU, such as ARM or more advanced control boards, if the I/O ports
need to be used as the input and output mode, they have to be set to the input mode / receiving mode. The 51
series microcontrollers can be used directly, there is no need to set the input and output mode.
3.2.3.4 Wire connection
As shown in the below figure, the upper column is the "GND" interface, the middle column is the "VCC"
interface, and the lower column is the "OUT" interface, where "A0" corresponds to the "OUT" of the left
trace, and "A1" corresponds to the "OUT" of the intermediate trace. "A2" corresponds to the "OUT" of the
right trarce.
Figure .3.2.19 Wire connection diagram
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