DLP-RFID2D USB Dongle. 1.0 INTRODUCTION. The DLP-RFID2 is a low-cost, compact module for reading from and writing to HF RFID transponder. tags via an internal or external antenna. It has the ability to both read and write data in addition to. reading the unique identifier (UID). All of the DLP-RFID2âs electronics reside on a single, compact. PCB, and all operational power is taken from one 3.0- to 5.0-volt supply. An external antenna can be. connected via a standard u.fl connector or IO pin/pads.
Quick Answer. Water molecules have covalent bonds. Each molecule consists of two hydrogen and oxygen covalent bonds. However, when water molecules are placed together, as they are normally, the hydrogen atoms in each molecule can form hydrogen bonds with the oxygen atom of other molecules. Continue Reading.
Opposite charges attract one another. The slight positive charges on the hydrogen atoms in a water molecule attract the slight negative charges on the oxygen atoms of other water molecules. This tiny force of attraction is called a hydrogen bond. This bond is very weak. Hydrogen bonds are formed easily when two water molecules come close together, but are easily broken when the water molecules move apart again.