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Hw-613 Adjustable DC To DC Buck Converter Module 3A - a small green rectangular circuit board featuring a silver potentiometer, a grey inductor, and capacitors.

Hw-613 Adjustable DC To DC Buck Converter Module 3A

PKR 160
Lithium Polymer Battery 200mAh 3.7V - shown as a rectangular silver cell with yellow tape, a protection circuit, and two loose red and black wires.

Lithium Polymer Battery 200mAh 3.7V

PKR 140
5V 16 Channel Relay Module With Optocoupler LM2576 Power Supply - a blue rectangular circuit board with sixteen blue relays and screw terminals.

5V 16 Channel Relay Module With Optocoupler LM2576 Power Supply

PKR 1,870
4 Channel Relay Module Relay Board Arduino Relay Module - a green circuit board featuring four black JQC-3F relays, four red LEDs, green screw terminals, and a black header connector.

4 Channel Relay Module Relay Board Arduino Relay Module

PKR 360
2wd Round Robot Car Chassis - a clear circular acrylic platform with two yellow wheels, two DC motors, and a metal caster wheel.

2wd Round Robot Car Chassis

PKR 860
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