These AC to DC power supplies use a single chip to convert mains 220 V or 120 V input AC into 12 V or 5 V DC without depending on a transformer. Three simple yet efficient 220V single chip based … [Read more...] about 3 Solid-State Single IC 220V Adjustable Power Supply Circuits
1.5V Power Supply Circuit for Wall Clock
The post presents a simple transformerless 1.5V DC power supply circuit which can be used for powering wall clocks directly from mains, and also keep a stand by back-up cell fully charged for enabling … [Read more...] about 1.5V Power Supply Circuit for Wall Clock
Transformerless Relay Driver Stage
In this post we discuss an enhanced transformerles power supply circuit design which consists a well stabilized and regulated DC stage along with a relay driver stage which operates through an … [Read more...] about Transformerless Relay Driver Stage
0-300V Adjustable MOSFET Transformerless Power Supply Circuit
This simple MOSFET controlled transformerless power supply circuit can be used for delivering a continuously variable 0 to 300V DC output and a current control from 100 mA to 1 Amp. To protect … [Read more...] about 0-300V Adjustable MOSFET Transformerless Power Supply Circuit
MJE13005 Compact 220V Power Supply Circuit
The following article presents a very simple low current mains operated transformerless power circuit using an inexpensive MJE13005 transistor and few other passive electronic … [Read more...] about MJE13005 Compact 220V Power Supply Circuit
High Current Transformerless Power Supply Circuit
The simple configuration of a transformerless power supply circuit presented below is able to provide high current at any assigned fixed voltage level. The idea seems to have solved the problem of … [Read more...] about High Current Transformerless Power Supply Circuit