开云体育

Paul The v2 does not use LM338, it uses a switching regulator. We also use a 7805 step down that feeds the 1117s. There are 3.3v zeners on all external facing gpio pins - f [email protected]>

While I wait for my sbitx v2, I have noticed there are no 'backward facing' clamp diodes on the fixed regulators that prevent the regulated output voltage (VOUT) exceeding the input voltage (VIN) on

Thank you Ashhar.? If I understand what you are saying, with version 2.5.4 of WSJT-X it did not reset the USB port, but they changed something in the code for WSJT-X 2.6.1 so that it does reset the

John, /g/BITX20/message/96629

Lou, I remembered that post from Allison but I can’t find it. What was the number of that post? Jack N6LN

Alvin, that is fine, I’m just would be really interested to know what I blew apart. That might help avoid a repeat! Gordon

Allison I found that post. Do you have any drawings you can share? 73 Lou KI5FTY

I found the Rpi output (and inputs) are fragile based on data sheets. So one of the mods I made and wrote about maybe 5-6 months ago were to buffer all lines out to the main board and and diodes and

Gordon, I have the time and have done some forensics on other devices.? I am NOT a Raspberry Pi expert.? I DO have the SMD tools that I need. With the above understanding, I would like to look

Ashhar: No worries my friend.? Glad you are doing some final checks on the software of the radios.? It gets here when it gets here.? Will have some time this summer to tinker with the software.?

I don't have the time//ability to " It would be interesting to do the forensics on one of the dead RPis to see if that diode is shorted or open." If someone is really an expert on failed rPi's and

John, Trying the 3.3 volt (maybe 3.6 volt?)? with or without the resistor could not hurt.? The diode would add capacitance that might make the I2C decode an issue, so I would do the Zener first,

Mark, If you monitor the current draw of sbitx, it is well under 1A on receive. There is no way the rpi can draw more. There is some other reason, not low voltage. The low voltage warning happens

Could any of these failures be caused by low current supplied to the RPi by the radio? I have noticed that it I try to connect an NvME SSD drive to the USB port, it’s operation is erratic. I have no

It has to do wit this: The usb port resets when reopened by wsjtx, on arduino this resets the arduino and the ubitx loses track of what was going on. I had mentioned this to the wsjtx guys but they

Hi Dj, I don’t remember the exact issues I had when trying to upgrade but I ended up doing the same thing: reverted back to 2.5.4. Cheers, Scott

A 12V Zener might be well advised on the power line, and I bought a bunch anyway for the gates of the finals, but since my supply puts out 13.7V I wonder whether I should also put two or three regular

Ahh, ok. I did not find the ver. of the first manual (I like the "hellov2 name, hi) so I asked. Versioning of the .iso image is a must of course. Thanks for info and your help. - P

Petr, Git has in-built versioning but it auto generates the version names. I will mark the version with a more huma friendly names. We will host the iso image in another day. - f

Farhan, many thanks for the Sbitx V2 manual posted on github. As this document will be constantly revised to reflect the changes in the user interface, newer modes, etc. I suggest adding versioning