LAB power supply with current control (Tip for 10 )

LAB power supply with current control from 0 to 1.5 Ampere (Tip for 10 )

This is simpler version of variable power supply shown in this post.

Voltage is variable from 0 to 30 Volts and current from 0 to 1.5 Ampere.

LM317T is mostly in standard setup.

Potentiometer for voltage control is connected to ADJ pin of LM317T and negative voltage via trim pot, with which you can adjust minimum voltage.

Current control is done using  LM393 comparator and shunt resistror.

Output of LM393 is connected to ADJ pin of LM317T and regulates amperage, sensed over shunt resistor.

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Get Base File Info (Tip for 10 )

Here you can see example of getting basic file information.

Complete procedure of making this example program can be seen in the following video.

And following is full source code that you can use to test this example by yourself.

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LM317 Variable power supply with current control (Tip for 10 )

In this post I will show you easy to construct variable power supply using LM317 with some other components.

Final result is usable variable lab power supply with current control.

Current control is done using  LM393 comparator and shunt resistror.

Since I used one panel meter for voltage and current reading , I added LM358 OP amp to read current used by attached loads.

LM358 amplifies voltage detected on shunt resistor and amplify it to appropriate value which is set by variable trim pot.

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