Transformerless Power Supply Led Tubelight Circuit

An led tube light is lighting device built using high efficiency leds for illuminating a premise where it is installed through the available ac mains supply.

Transformerless power supply led tubelight circuit. The following post explains the complete construction details of a simple led light tube circuit using 20 ma 5 mm high bright white leds. The primary function of a transformerless adjustable power supply is to translate an input ac signal to a required dc level. Capacitive type is more efficient since its heat dissipation and power loss are very low. Low voltage dc like 5v 6v 9v 12v is used in electronics circuits led bulbs toys and many household electronics items generally batteries are used to power them but they need to be replaced time to time which is not cost effective and also takes our time energy.

I have discussed a few transformerless power supply circuits in this blog which are good only with low power applications and tend to become less effective or useless with high current loads. The basic working principle of the transformerless power supply is a voltage divider circuit that converts single phase ac high voltage to a desired low dc voltage without any use of transformer and inductor. Transformerless power supply circuit diagram. This clever design uses 4 diodes in a bridge to produce a fixed voltage power supply capable of the current 35ma.

Resistive type power supply on the other hand dissipates more heat so the power loss is quite high. Here in the above circuit 230v ac supply can be dropped by using 225k 400vx rated capacitor. Here is a dc voltage regulated transformer power supply circuit. Please i am having this issues with transformerless power supply.

That s it you have just converted a dead cfl into a high bright led bulb. The basic circuit of the transformerless power supply. The two basic types of transformerless power supplies are capacitive and resistive. The above concept utilizes high voltage pp capacitors for dropping the mains voltage to the required level however it is unable to raise current levels as per any desired particular.

Generating low voltage dc from the 220v or 110v ac mains is very useful and necessary in the field of electronics. So in this project we are going to build a simple 220 110v ac to 0 12v dc transformerless adjustable power supply circuit using lm317 linear voltage regulator ic an x rated capacitor. This is a simple transformer less power supply circuit. See in the circuit.

Finally connect the ends of this series led assembly with the led board points of the above explained power supply circuit. Fixed voltage regulated transformerless power supply. Feed the 220v input to the capacitive supply and watch the led dazzle up with mind blowing brightness. Each time i intend to use transformerless power supply to power microcontroller 8051 atmega328p and even a dc fan of 12v 1 4a i notice that they never get powered even though the power supply has been tested to produce the required 12v or 5v dc as the case may be.