Simple Regulated Power Supply
When you collect an electronic home-made product, you need a power supply to test it. There is a wide variety of ready-made solutions on the market. Beautifully decorated, have many features. Also a lot of kit-kits for self-production. I'm not talking about the Chinese with their trading floors. I bought on Aliekspress board modules down-converter, here on it and decided to do. The voltage is regulated, there is enough current. The unit basically has a module from China, as well as the radio components that I had in my workshop (they had been waiting for their time for a long time). It regulates the unit from 1.5 volts to the maximum (it all depends on the rectifier used up to the adjustment board.The AC rectifier will be a diode bridge, it can be assembled from four diodes. Smooth pulsations will be an electrolytic capacitor, I have 2200 microfarads and a working voltage of 35 volts. Applied used, was available.Adjusting the output voltage will be a Chinese module. There are a lot of them on the market. It provides good stabilization and is quite reliable.For a comfortable adjustment of the output voltage, I will use a 4.7 kΩ adjustment resistor. The board has 10 kΩ installed, but I have what I put it on. The resistor is still the beginning of the 90s. With this rating, adjustment is ensured smoothly. I also picked up a pen on him, also shaggy.The output voltage is indicated by a voltmeter from China. He has three wires. Two wires are powered by a voltmeter (red and black), and the third (blue) is measuring. You can combine red and blue together.Then the voltmeter will be powered by the output voltage of the unit, that is, the display will light up from 4 volts. Agree is not convenient, that's why I'll feed it separately, about this later.To power a voltmeter, I will use a domestic 12 volt voltage regulator chip. Thus, I will ensure the operation of the indicator-voltmeter from the minimum. The voltmeter is powered by a red plus and black minus. The measurement is done through the black minus and blue plus the output of the block.I have domestic terminals. They have openings for banana plugs and openings for clamping wires. Similar can be bought in China. I also picked up wires with tips. jpg "style =" max-width: 100%; " alt="Simple adjustable power supply">
Description of the componentsI have a 17.9 Volt transformer and a current of 1.7 Ampere. It is installed in the housing, which means you don’t need to pick the last one. The winding is quite thick, I think, and 2 Amps will pull. Instead of a transformer, you can use a pulsed power supply for a laptop,but then you also need a case for the other components.
Power supply assemblyEverything is going according to a simple drawn outline.
Test blockThe power supply adjusts the voltage from 1.23 Volts.
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