Re: Introduction / Newbie Questions


I agree that on that layer it appears to be jumping the regulator.  I'm simply reporting what is documented in the TSW doc that I linked, and can confirm that J1 is jumped on the display I received from HF Signals as well.

73, Andy

On Sun, Nov 8, 2020 at 11:45 PM, William Kimber <will-k@...> wrote:


Do you mean " jumper for 5v"?

 Photo looks to me to be, jumper j1 to bypass regulator and run from 3.3v. I don't have display to check.  Also seems logical that it is set up for 5v and requires adjustment for 3.3v. Much safer.




On 9/11/20 3:56 pm, AndyH wrote:
Hey Mark,

   The HiLetGo display has a 3.3V 3-pin voltage regulator on the board (U1), but by default it is not in circuit.  There's a small pair of pads (looks like a regular SMD pad) labeled J1.  If you jump the pads with a solder blob, you can run the display from 5V.


On Sun, Nov 8, 2020 at 02:47 PM, Mark Erbaugh wrote:




I located a display on Amazon (


that appears to be very similar. However, the docs say that it only runs on 3.3V, not 5V and that level shifters are required. I don’t see those on the schematic. Is this display being run at 5v?




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