Simplest 5V Transformerless Power Supply Circuit

How to make Simplest Transformerless power supply for low current and low voltage application(5volt 150mAmp) using a IC-LR645

By:Alok kumar

Some of the followers of this blog have requested to post a simple low current and low voltage i.e 5volt & 100mAmp. So today i am going to post an transformerless power supply which is not only easy to construct but also very cheap and small or compact electronic circuit. This electronic circuit can be used to for various purpose like charging small li-ion batteries e.t.c. In this circuit we are going to use IC-LR645 which can control any voltage between 24 and 270 V AC and produces DC voltages below 15 volts at the output, which becomes ideally suitable for operating condition.

The great thing about this circuit is that it does not include or incorporate any bulky transformer but it also dont uses high voltage polar capacitors here. So no worries about surge current and we don't need crowbar protection circuit here.

Fastest 10minute Battery Charger circuit.

How to make Easiest 10-15 minute fastest Battery Charger

By: Alok kumar

Today i am going to explain how we can make the worlds fastest battery charger circuit at home in 5 minutes. It uses the most basic principle although it should be taken care that battery should not overcharged because it charges faster than any other charger.
The fast chargers out in the market actually is useless because i actually dont understand why their output current is much higher than specification of the battery. it may charge the battery faster like in 10 minutes but battery sooner become dead and useless and expands. They actually have no idea how fast charging works.

so just not wasting our precious time lets get started.

Here the components required is very popular and cheap so just dont worry you will get those components in seconds...

Components Required:

1. One rectifier diode IN5402, or IN5408, any you can find quick.

2. One incandescent bulb, having nearly exact voltage rating as the battery but current rating of the bulb should be 1/10 of the value of battery AH (AmpereHour).