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Remaking a computer ATX-250 into a laboratory power supply 0-35 V 500 W. Schematic https://yadi.sk/i/VIM1i3rM3K9L5U or https://drive.google.com/file/d/1Ih8z... For some reason, the original diagram does not show the diode between the 1st and 4th legs of the LM339, with the cathode to the first, without the diode there will be no start. Digital voltammeters http://ali.pub/1inhau Multi-turn potentiometer 3.3 kOhm http://ali.pub/1ns7ex Video about the oscilloscope • Synchroscope SI-1 in detail. Part 1 All my videos / @Dmitry_Korzhevsky If you are a regular customer of Ali-Express, then register at this link http://epngo.bz/cashback_index/61900 and you will be guaranteed a refund (cashback) from 7 to 18% of the cost of all your purchases from now on and forever! Mobile application ePN Cashback http://epngo.bz/cashback_install_app/... Browser extension for cashback http://ali.pub/1mcrh6 Installing the browser extension ePN Cashback http://ali.pub/1mcsdn