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What does the Photoelectric Counter IR LM393 measure
Need a simple wireless connection when Wi-Fi and Bluetooth aren’t available
iPod or iPad or other device which expects some sort of resistance on the D+ and D- connections
Bluetooth Low Energy Module HM11 CC2541
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Battery Lithium Ion Polymer 3.7v 1200mAh 2.1mm plug What does the Photoelectric Counter3. 7V Lithium Ion Polymer Battery 1200mAh The Lithium Ion Polymer Battery 3. 7V 1200mAh is a rechargeable lithium cell with a JST connector, designed for portable electronics, wearables, IoT devices, and maker projects. Pair it with a LiPo charger like the TP4056 or Adafruit Micro Lipo. Safety: Lithium batteries can be dangerous if punctured, short circuited, or overcharged. Always use a proper LiPo charger with protection circuitry. 3. 7V battery
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