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hi welcome to robojax in this video we are going to do a test review of this lm2596 regulator with the input of 4 to 40 volts and the output of regulated 1.25 to 37 volts with the display we're going to test this this can handle up to 3 ampere we are going to see if it can handle 3 ampere at the under different voltage conditions so let's get started this is a step down converter uh using the lm2596 regulator so this has an led display that shows the voltage input and output depending on selecting the switch so now it shows the light is on here it shows that the input voltage is 12.5 volts if i want to see the output just press this and the light will be on so it just shows that the output is now 3.7 volts so the first thing i've connected my power supply has 12.3 volts and as you can see here it shows 12.5 so death 12.3 is the same as my multimeter which is very precise so i'm trusting this one so this now shows 12.5 which is incorrect and now this is the output of the regulator which is now connected to my multimeter i want to see now i'm reading 3.6 so that is the output now let's see what it shows here it shows 3.7 so if it has rounded 3.67 so still acceptable so this is the output now let's adjust the output let's say you want five volts i'm rotating clockwise so that is 5 volts we are getting 5 volts and input is 12 volts now at the same 5 volts now i'm going to increase the input voltage i want to see how stable it is now as you can see i put 16 volts now it goes to 18 volts so far there is no load i just want to see the how it regulates now let me increase it so now let me put the industrial voltage of 24 volts so now it's almost 24 volts and output was very stable did not change let's say you want to get 9 volts 6. so nine eight point nine so now at we have 24 volts at the input and nine volts at output now let's get 12 let's see if we can give get 12. so it now gives 12 volts so still good by the way this is not a transistor this is lm3 lm317317 this is a voltage regulator so this has been used with conjunction to this to get regulated voltage now this is getting hot not that much so if i go to 30 volts now it's 30 and output is 18. the input capacitor has a rating of 50 volts it's very hot okay this is very hot so now the output is 18. let's put this 18 and see what is the difference between input and output so if i have if i have 18 volts i'm getting 17.4 so 0.6 volts difference in voltage here so let me go to 12 yes so now here is it's 0.4 it has decreased my electronic load is set at 4.7 so my electronic load is set at 4.9 and and the current is set at 3 ampere so let me turn it on the output is 5 volts input is 12 volts we want to see if it can handle 3 ampere now it's 3 ampere the voltage is there so this circuit is drawing uh 1.95 so 12 times 1.95 23.4 watt now the output is 3 times 5 15 watt so if we have 23 minus 15 8 what is being dissipated here very hot on this side [Music] now the voltage dropped below the input and it's off now voltage dropped below the input and it's off now so so 4.8 now it's all now i'm setting it at 2 ampere 5 volts 1.99 that's 2 amp is being drawn and that's the voltage my power supply shows 1.2 so 12 times 1.2 the total power from my power supply is 14.4 and here 2 times 5 is 10. this is very hot i do not trust this if you want to run it for a long time even for 2 ampere this is not good this inductor is hot so now i have set this at 21 volts and the output is 20. now at 2 amperes let's see now the input is 21.3 volts and output is 20. so we are just regulating it 20 volts and a 2 ampere [Music] i've said now i have set the input at 23.3 volts and the output is 20 volts so let's say you want 20 volts at 2 amp let's test it can see this is 20 volts and the wire drops to 19.88 but my power supply shows there that i'm getting 2 ampere times 23 and here i'm getting 2 ampere times 20 so very little drop between input and output and as a result there will be less heat dissipation so the larger the the difference between input and output because this has very low efficiency there will be a big voltage drop here and it will heat up now it's hot again so a 2 amp let's try it at 3 amp very hot i don't think it can handle it i don't want to burn it it's extremely hot conclusion is that this module i believe they have the same design with without this display so warning and be careful thank you for watching please thumb up the video please share it subscribe i appreciate it you