XL4015 5A Step Down Adjustable Power Supply with LED Voltmeter Servo Motors/Controllers These are 7 x 4

These are 7 x 4 cm gear motor robot wheels ( 4pcs)

Internal flow channel extrusion forming

DIY Educational Electric Reptile Robot for Science Experiment

Safely controls battery charging with 220V AC input and relay output

XL4015 5A Step Down Adjustable Power Supply with LED Voltmeter Servo Motors/Controllers These are 7 x 4XL4015 5A Step Down Adjustable Power Supply with LED Voltmeter The XL4015 5A Step Down Adjustable Power Supply with LED Voltmeter is a high efficiency DC DC buck converter module designed to reduce higher DC voltages to a stable and adjustable lower output. Powered by the XL4015 controller IC, this module supports an input voltage range of 4V to 38V and provides an adjustable output from 1. 25V to 36V with a maximum current of 5A. The built in LED