LM317T Voltage Regulator with Pass Transistor

Assembling a Power SupplyOne of the most common variants of self-assembling of power supply is assembling the device of prefabricated modular units. For example, when you have already chosen a power supply of the required voltage and current, you still need to select a voltage regulator. And it would be great if it had a display with digital controls. When this problem is also solved, you just need to choose a body and put the selected electronic components into it.Now what do we have? A switching power supply with a 1.4A load and the voltage of 15V. A small-sized and compact product with no-failure operation........ Then, a voltage regulator from 1.5 to 15V (VM038, a Master KIT product) equipped with a segment display to help you regulate the voltage by a digital control. So you can enjoy its convenience.........What do we need now? A body that would match the size of chosen components: just search, find, choose and buy........ Then a power cord, a power switch, while all the rest are mere details: I mean a fastener and tools to finish and fit our device into its body........Firstly, we put the regulator circuit in a convenient place in the body. I've chosen a cover for the body, it has smaller edges and conveniently matches the markup of the display and control buttons......... At first, we drill holes for the buttons...... After we put them in the lid, we mark a rectangle to place the display; we use for this a drill with a cutting disc..... Try to cut with a smaller ...



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