The USB (Universal Serial Bus) is a standard that defines the cables, connectors and used a bus to connect, communicate, computers, peripherals and electronic devices protocols Transmission Rates Low speed (USB 1.0). Transfer rate up to 1.5 Mbit/s (188 kB/s) used in keyboard, mouse ... transfer rate up to 12 Mbit/s (1.5 MB/s) High Speed ??(USB 2.0): Rate transferencia up to 480 Mbit/s (60 MB/s) SuperSpeed ??(USB 3.0) transfer rate up to 4.8 Gbit/s (600 MB/s) Connector Types 1 - USB type A (4 pin) 2. - USB type B (4 pin) 3 - Mini A (5-pin) 4 - Mini B (5-pin) 5 - Micro A (5-pin) 6 - Micro B (5-pin)

or horizontal. The micro USB with five pins, which pins identification (ID) Micro AB USB connectors special work. AB connectors with pin ID can allow the device to function as a connector A or B to standard USB technology. This gives the new smart phones and other devices the option to act as either a single storage device or as provi

The mini USB connectors are smaller than their standard counterparts and have USB fifth pin. The fifth pin is known as the pin ID and is typically not used in mini USB connectors. It was designed to allow later improved USB technology. The mini USB connectors have a cycle life of at least 5000 connections and disconnections, which accommodates the mobile nature of the devices that are designed to interact. The standard USB connectors are generally used with devices that are stationary and not disconnected often.

USB 3.0 is the second major revision of the standard Universal Serial Bus (USB) connectivity for computing. USB 3.0 has transmission speeds of up to 5 Gbit/s, which is 10 times faster than USB 2.0 (480 Mbit/s). Connector Types 1 - USB type A plug 2 - 3 USB type A female - USB type B 4 - Micro USB B

Surface mount technology, better known by its acronym SMD (Surface Mount Device) is the method of construction of electronic devices most currently used. It is used for both active and passive components, and is based on the assembly thereof SMC (Surface Mount Component English) on the surface of the printed circuit. In the case of SMD LED technology is the differently constructedon the plate makes SMD LED and have a physical difference.

USB-C reversible USB version called USB cables USB Type C Type C or USB reversible. The important thing is this type of USB is that it has top and bottom. So you may save the blows that are given involuntarily to connect the connector upside down. It is also characterized in that when connected will make an audible "click". The USB-C or reversible USB cables can reach 10 Gbps and support USB 3.0, 3.1Use is estimated up to 10,000 applications and has some measures 8.4mm x 2.6mm is also compatible with USB 3.1 and USB indicate creators

The SMD LED is an LED module that uses a surface mount technology to place a diode on the surface of a printed circuit and encapsulated on a semi-rigid resin. Typically used for lighting all types, since its opening angle can be 360° and LEDs, being very small, they can be distributed throughout the bulb. Ideal for decoration lighting in homes or places of transit dondand they will not be on continuously. It is also often used in automotive interior lighting. Each LED SMD chip is identified by a 4-digit number. This code identifies the size of the LED chip, the first two digits indicate the height and width the next two, in millimeters. For example, the dimensions of a LED 5050SMD are 5.0 x 5.0 mm. There is an exception, 3528SMD LED chip is also knownon how 1210SMD, with dimensions 3.5 x 2.8 mm.

When calculating the life of a battery it will be necessary to know the number of charge cycles that can be performed until the battery does not begin to lose its capacity.
Depending on the type of battery these charging cycles can vary, the most common being the mobile batteries, manufactured Li-Ion or Li-Po, which have a duration of between 300 and 500 charging cycles according to model and manufacturer.
Once thisE limit we will notice how the battery loses duration of operation, arriving to lose up to 25% of its capacity of load.
At this point it will be necessary to evaluate a battery change.
It should be noted that usage and charging habits can significantly affect battery life. For example, factors such as heat, charge the battery several times a day without it is almost exhausted, etc. Will be affectedits duration.
Therefore, to get the most out of the battery we must know when a full charge cycle is performed, and try to avoid misuse of charge, to increase its useful life.
A charging cycle is considered when the battery has been discharged or its 100% charge has been used.
The manufacturers advise that the charge is never made below the 58% battery, since the battery voltage would not fall so lowTo, so you could end up winning up to 4000 charge cycles.
Tips to increase the life of a battery.

• Avoid extreme heat or cold or very long applications of the device.
• Charge the battery as often as you can.
• Fully discharge the battery from time to time.
• Do not let the battery run out completely before charging.

Below is a table with theDifferent voltages (V), charge cycles (C) and battery percentage (B).

The COB Led (chip on board) is a plate (A) with a concentration of LEDs in the form of matrix (B) covered with a special silicone.
This type of led due to its design and installation allow to dissipate in a more efficient way the heat generated by the lighting.
It must be taken into account that the heat is generated in the opposite direction to the light and a low dissipation will cause the led to work in less optimal conditions.thus, its useful life.

Thanks to this design the Led COB is designed to work for long hours.
Its beam of light is multidirectional, so it is a type of diffuse light without dazzling at a point, achieving up to 160 º opening light and have a superior performance to the type of LED SMD.

Its manufacturing cost is 20% lower than an SMD led and its technology offers a reproducible indexchromatic ion (CRI) much higher, getting a better appreciation of colors.

In short, the COB LEDs can produce more lumens using much less energy than the rest of the LED technologies.

The SMD led (surface mounted device) refers to how the LEDs are mounted on a board. This type of LEDs have a resin encapsulation on their surface. It does not reach the same performance as a COB LED and is usually used in less demanding luminaires due to its low heat dissipation, the main problem in this type of LEDs.

Its light is unidirectional, creating an angle of illumination is 360º to difof a COB LED. By not having any type of filament this type of LED is very durable and resistant to shock.
They are the typical LEDs that we can find in a strip of LEDs for decoration, we can find according to your design, a single LED that will emit white light or according to your distribution you can find 3 LEDs that emit the different primary colors that in combination will show different .

Your performanceIt is usually 60 to 70 lumens per watt.

Within the SMD LEDS range we can find those that work at 220v and those that work at 12/24v.
Its nomenclature is of type SMD5050, SMD3528 and SMD3014 etc. where the figures indicate the size of the led, for example a led SMD5050 will have a size of 5x5.0mm