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.
