Simple 12V transistor switching power supply
Can we build the switching dc power supply circuit with 2 transistor? This may be a good choice for you. Read more
Power supply
3 Simple UPS circuits (Uninterruptible Power Supply) Diagram
The simple ups circuit diagram as small emergency backup battery systems, can apply a lot applications, when power go out it will backup power automatically […] Read more
Four Small 5-volts DC Regulator Circuits
This Small 5-volts DC Regulator. without IC-7805. Using transistors are interesting. If you have an old transistor or want to save. It may be a good choice. Read more
7 ideas of 555 DC boost converter circuit
I would suggest the IC-555 DC boost converter circuits is a key equipment that it is popular and easy to uses so can be used in many circuits. Read more
The Variable High Voltage Power Supply 0-300V
it is protected the current over the limit that we define at about 100 mA. Read more