Hi! I am currently encountering a problem about the USB Host Shield not detecting my USB device (Joystick). I wonder if it is related to the fact that the supposedly 3.3V pin (GREEN box) became 4V after i soldered it. I'm pretty sure it was 3.3V right before i soldered it since i was fortunately abl…

Sorry, what do you mean "not touching anything on the UNO"? It wont get power unless attached on top of the UNO, though. If it is shorted, is there any way to fix it? Can i just remove all solder and just resolder? Also, after trying other devices, it seems to be able to detect my keyboard and phon…

[image] xmetaphorx: Sorry, what do you mean "not touching anything on the UNO"? make sure the bottom of the shield is not touching anything on the Uno 3.3V with respect to ground, the one on the left (Pink) measures 4V and the right (orange) 5V. I don't see pink or orange

[image] Sorry, Maybe i made it too small to see

With you meter negative lead connected to the GND you should measure 5V in the red square, 3.3V in the green square and 5V in the yellow square. If not then something is shorted. If your are reading 4V on the 3.3V pads below the Yellow square, then make sure there is NO solder on those pads. To be…

Gotcha! Will clean and resolder everything first thing in the morning. Will update after

[image] USB Host Shield not working - wrong SMD chip populated? Hardware Hello, i try to get a (big) USB HOST shield working with a Uno. I bought the shield from a well known seller here in germany but it does not want to work. USB HOST lib V2.0, the 3 solder jumpers are …

Hi! Thank you so much for this. I checked it out and dug deeper into it. I then found several other posts with similar problem and very similar situation as how i described it here (e.g. only keyboard is detected, 3.3V jumped to 4V after soldering the pads, etc.). I think the problem really lies in …

[image] xmetaphorx: 74HC125 instead of 74AHC125. Either should work but unless you are experienced in surface mount soldering (don't think you are) I would not bother

[image] jim-p: Either should work but unless you are experienced in surface mount soldering (don't think you are) I would not bother The 74AHC125 has over voltage tolerant inputs so can be used for 5V > 3.3V logic level conversion. On this board it is used to convert 5V signals from the Uno t…

@customcontroller Are you working with @xmetaphorx

USB Host Shield 3.3V became 4V after soldering

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customcontroller November 20, 2024, 7:17pm 13

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USB Host Shield 3.3V became 4V after soldering

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