Transformerless 1 Watt LED using SMD LEDs

At present 1 watt LEDs are extremely poplar and these are generally used in most LED lamp functions. Even though these are extremely beneficial with regards to light intensity levels and present usage, these types of high watt LEDs need an astounding heatsink to be able to have them working the right way and optimally.

Without a heatsink, 1 watt LEDs could become totally ineffective as it suggests an instantaneous harm to the devices because of over heating and thermal runaway.

Additionally these LEDs need unique aluminum base PCBs for the set up, which often needs an external aluminum heatsink for further cooling.

Each one of these compulsions create these types of LED modules relatively complicated to put together and apply for hobbyists or any interested new electronic enthusiast.

Nevertheless with the advent of numerous smaller SMD LED versions which range right from 20mA to 60mA, producing 1 watt LEd equivalents with similar illumination and dependability has become a child’s play, and considering that these kinds of smaller variants usually do not require heatsink for operating causes them to be incredibly suitable and possible for the numerous beginners in the field who might be avidly intrigued and looking to play with, and make their own LED light projects for their homes, and possess the same among their friends.

A 1 watt LED equivalent lamp can be extremely easily created by including a many 20mA or 50mA smaller LEDs and configuring these along with an appropriate supply voltage.

The fact is any high watt equivalent LED can be created by utilizing these smaller low current LEDs as preferred, consequently it’s easy to create a 3 watt, or a 5 watt or perhaps higher rated LED utilizing the smaller counterparts for example the 3528 LEDs or the 2214 LEDs.

The benefit of utilizing smaller LEDs for producing the exact illumination similar to the 1 watt, 3 watt or 5 watt may be summarized as enumerated below:

Benefits (Pros)

Low current LEDs may be controlled without requiring a heatsink, and over any normal PCB. The utilization of unique, costly aluminum base PCBs can consequently be prevented using these LEDs.

Low current LEDs turn out to be suitable for transformerless capacitive power supply units, as well as SMPS procedure is generally discarded.

With a capacitive power supply being used, the necessity of a current control turns into irrelevant since the input capacitor on its own works similar to an efficient current controller and alone has the capacity to reduce current to the determined levels.

A high watt LED created by utilizing low amp LED might have the potential of creating more illumination in comparison with just one exactly the same rated high watt LED.

As a result of the above luxuries, such high watt equivalents may be conveniently developed even by the noobs or people who find themselves fairly new in the field of electronics.

Drawbacks (Cons)

The only drawback is the required size of this kind of components which might be somewhat bigger area wise, as well as the assembly could possibly be somewhat very slow process.

The following diagram demonstrates an illustration 1 watt LED lamp circuit created by making use of 16nos of 2214 (20mA) SMD LEDs and a surely graded transformerless power supply.

steps to make a 1 watt LED utilizing many 20mA 2214 or 3528 LEDs

Almost all the 20mA LEDs may be seen linked in collection with a portable transformerless power supply.

A 20mH inductor could also be observed, this is exactly included to stop the initial switch ON surge, the zener diode offers an additional security from any kind of feasible voltage changes.

We can incorporate an NTC thermistor at the input for offering actually greater security to the LEDs from surge currents.