I'm having trouble with the boost converter I made. Everything works properly with a large resistance value ;however, once I change the load resistor to a small value the system stops boosting the voltage and the output is only a fraction of the input voltage. Anything below 20 Ohms and the system s…

The article uses a logic level mosfet (IRLI640), while you used a fet (IRF540) that can't be fully turned 'on' with Arduino's 5volt logic. Details matter. Leo..

So do you think that, would lead to the boost converter to stop working with a smaller load?

Don't know. There might be more wrong. Might be the wrong schottky diode, or the wrong type of capacitor, or your wires are too long/thin, or you use a breadboad, or your PWM frequency is too low (you used a 22uH inductor instead of 330uH), etc. It's not easy to make a good buck or boost converter…

I would start by copying a known good circuit - down to the very parts they used, or at least something that's very close in specifications (in which case you will have to understand the circuit deeply enough to know which parameters to look at exactly, as not all matters as much). Then it being a …

Hi, What are your input and output voltages, how much current do you expect to get out of the circuit. What are you using as the input power supply? Tom.... :slight_smile:

Sorry for the slow response... I ordered a few new components, such as a IRLI640, a bigger inductor (330uH) and a higher rated voltage diode (MBR10100GOS). I've already seen a huge improvement with the new MOSFETS. I was able to easly step the voltage up from 2.97 V to 50 V and rising (I shut the po…

Hi, Thanks for the nice clear picture. With high frequency power supplies, layout is important, so try grouping your components closer with shorter wiring, it may help the situation. Protoboard is not the best environment for this type of subject. I can only see one resistor where the voltage fe…

Hi, The originator has only supplied test figures for under 300mA output current. I doubt if you will get 6A output, especially in protoboard setup. No performance figures for higher loads. If you read the article, there is always quotes of output voltages, but no output current of any serious v…

From the picture, it looks like an air core inductor. The switching frequency of the circuit is quite low (62kHz). More usual would be ferrite core inductor, however, I can’t say if that makes any difference. I usually buy these things ready made, however I did make one for a Nixie clock power supp…

6A output at 50V that would mean 300W of power output. Assuming 80% efficiency (the good ones reach just over 90%) that would also mean a 75A current on the input side. Are you serious about this? I'm sure there are better ways to produce such a power supply! Your solderless breadboard will end up …

Arduino Boost Converter

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Arduino Boost Converter

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