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4 Cell 18650 Lithium ion Battery Holder TM1637 4 Digit 7 Segment LED Display Durable & Flexible: Stranded tinned-copper
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4 Cell 18650 Lithium ion Battery Holder TM1637 4 Digit 7 Segment LED Display Durable & Flexible: Stranded tinned copper Durable & Flexible: Stranded tinned copper core resists fatigue from repeated bending Pin 1 (VSS) Ground (GND) Pin 2 (VDD) Power Supply (+5V) Pin 3 (V0) Contrast Adjustment (connect to potentiometer wiper) Pin 4 (RS) Register Select 0 for command and emergency lighting setups parallel circuits
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