This power supply could power a 555 oscillator driving an LED. Another test used C ac =0.22µF, R1=10kO, R2=470O, R B =470O, C F =470µF, and Q1=BC549. This could be used to build a zener-transistor ...

To understand a series circuit, visualize it. You can do that by making a drawing. Just draw a box, to start with. This box represents your circuit. Notice there is only one path: the perimeter of the ...

Useful for electronics hobbyists, this linear workbench desktop power supply circuit converts a high input voltage (12V) from the SMPS of a PC into low output voltage (1.25 to 9 volts). An adjustable ...

When reaching for a power supply design it’s normal here in 2022 to reach for a switching design. They’re lightweight, very efficient, and often available off-the-shelf at reasonable pr… ...

The Principle A transformerless power supply (TPS) is basically just a voltage divider that takes the 115 or 220 VAC from your wall and divides it down to whatever voltage you want.

Any savings in the power-conversion path is worthwhile. Figure 1 shows a typical supply with 120- or 240-V ac input. A power-factor-correction (PFC) stage is required by the electric utility.

In addition to the natural output capacitance of the power supply, you might add a series inductor and another filter capacitor to further reduce output noise (Fig. 3). The inductor passes dc ...