Traditional Chinese Practical Simple regulated power supply: Circuit Design, Parts List & Workshop Prototype Guide
In short: Traditional Chinese Practical Simple regulated power supply. This entry documents a circuit & prototype taken from Chinese practical-technology literature, written for small-scale makers and home producers. The text below is the full English translation of the original Chinese workshop notes, covering materials and quantities, the step-by-step sequence, and the practical cautions recorded in the source. Roughly 1039 words of English technical text, translated and preserved without editing. It is intended for experimental and reference use, not for regulated or commercial certification.
Simple regulated power supplyAmateur radio enthusiasts often need different stable power supplies when experimenting, testing, and debugging various circuits. Here we provide you with a very simple adjustable and stable power supply. The output can be changed from 1.5V to 12V and is continuously adjustable. The maximum current can be greater than 250mA. If LM317 is added with a heat sink, the current can be much higher.The circuit is shown in Figure 13(a). It consists of a three-terminal adjustable voltage stabilizing integrated circuit LM317, a potentiometer (5kΩ), a fixed resistor (240Ω) and a capacitor. Adjust the 5kΩ potentiometer to adjust the stable output voltage. The unstabilized power supply in the picture uses 10 rechargeable nickel-cadmium batteries connected in series. This kind of rechargeable battery is relatively expensive and can be replaced by ordinary commercial power that is stepped down by a transformer (down to 12V) and then rectified and filtered, as shown in Figure 13(b). alt="13a.jpg (43261 bytes)">(a) …
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Lei Cheng
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