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It has an internal current limiting
The board supports USB 2
The emitter sends out an ultrasonic sound wave
This 2 Pin Screw Type PCB Terminal Block - 3
Schmitt trigger input-pulse line
1.3" OLED Blue Display Module with Regulator 74LS74 It has an internal currentThis 1. 3" monochrome OLED is basically a 128x64 dot matrix display module with an I2C interface. It's ideal for Applications that require a very small display. When compared to LCD panels, OLED displays offer a variety of benefits, including high brightness, self emission, high contrast ratio, slim outline, broad viewing angle, wide temperature range, and low power usage. Specification Resolution 128 x 64 Visual Angle >160 Input Voltage 3. 3V ~ 6V
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