|
I saw in a previous post that it was possible to modify the device to have a real time clock by adding a 32 KHz crystal which I tried to do. I ended up bridging some pins luckily with the battery disconnected but after I attempted to attach the crystal to the correct pins, connected the battery and flipped the power switch it starts up and looks ok but no sweeping and no response from touching the display. This modification appears to be very high risk and not too much of a reward other than the device knowing what the date and time is along with time stamping files correctly.
|
The addition of the xtal is simple and many Nanovna owners have done it successfully and you yourself said you screwed up the soldering.
With that said, you most likely still have a short from your soldering. Did you put the leads of the xtal right through the holes on the board? Are they shorting out underneath? Did you get a solder blob on the ZIF connector for the LCD?
Remove the xtal and make sure everything is clean on the PCB. You probably used too much solder and there is a short under the board.
Also make sure you disconnect the battery before you do any changes or cleanups.
On Mon., 3 Jan. 2022 at 9:06 p.m., Nicholas<n.moon@...> wrote: I saw in a previous post that it was possible to modify the device to have a real time clock by adding a 32 KHz crystal which I tried to do. I ended up bridging some pins luckily with the battery disconnected but after I attempted to attach the crystal to the correct pins, connected the battery and flipped the power switch it starts up and looks ok but no sweeping and no response from touching the display. This modification appears to be very high risk and not too much of a reward other than the device knowing what the date and time is along with time stamping files correctly.
|
I actually had the wrong pins at first (confusing schematic) and by the time I looked at the datasheet it was too late and the damage has been done and now after attempting to clean up the IC the device is dead, no power. I just have the wrong soldering iron and a tutorial would have helped a bit from someone who has done this before. I did not know there was a hole for this before I started and assumed the crystal had to be tacked onto the IC its self.
|
I found the problem as to why I have no power, there are broken traces leading from the SoC (U4) to various other components. I am going to take a look at the schematic when I am not so tired and bridge the broken traces. It is a double sided board but none of the damage is in an area where plate through holes are so it should be very straightforward. This will at least restore power to the IC and get it to power up again.
|
I'm sorry you damaged your unit - you really need to be very experienced at SMT soldering to try attaching anything to that processor chip. The iron tip needs to be like a needle and you need a microscope. Without those 2 items at a minimum, you'll cause some damage. This is what my older Nanovna-H looks like with a xtal (this mod IS difficult!): https://groups.io/g/nanovna-users/message/23632Any time I've indicated adding the xtal to the H4, I've mentioned the PC14,15 pins at the edge of the H4 pcb. There are even a few photos of this: https://groups.io/g/nanovna-users/message/14447Remove the display and clean your PCB with alcohol then look at it closely to see if any damage can be corrected. Good luck
On Monday, January 3, 2022, 11:37:07 p.m. EST, Nicholas <n.moon@...> wrote:
I actually had the wrong pins at first (confusing schematic) and by the time I looked at the datasheet it was too late and the damage has been done and now after attempting to clean up the IC the device is dead, no power. I just have the wrong soldering iron and a tutorial would have helped a bit from someone who has done this before. I did not know there was a hole for this before I started and assumed the crystal had to be tacked onto the IC its self.
|
The H4 with the v4.3 board is different than the v4.2 board. Does the
v4.3 board have the crystal for the RTC?
73
Stan
KM4HQE
переключити цитоване повідомлення
Показати цитований текст
On 1/4/22 7:23 AM, Larry Rothman wrote: I'm sorry you damaged your unit - you really need to be very experienced at SMT soldering to try attaching anything to that processor chip.
The iron tip needs to be like a needle and you need a microscope. Without those 2 items at a minimum, you'll cause some damage.
This is what my older Nanovna-H looks like with a xtal (this mod IS difficult!): https://groups.io/g/nanovna-users/message/23632
Any time I've indicated adding the xtal to the H4, I've mentioned the PC14,15 pins at the edge of the H4 pcb.
There are even a few photos of this: https://groups.io/g/nanovna-users/message/14447
Remove the display and clean your PCB with alcohol then look at it closely to see if any damage can be corrected.
Good luck
On Monday, January 3, 2022, 11:37:07 p.m. EST, Nicholas <n.moon@...> wrote:
I actually had the wrong pins at first (confusing schematic) and by the time I looked at the datasheet it was too late and the damage has been done and now after attempting to clean up the IC the device is dead, no power. I just have the wrong soldering iron and a tutorial would have helped a bit from someone who has done this before. I did not know there was a hole for this before I started and assumed the crystal had to be tacked onto the IC its self.
|
That info is very good to know - I've got the v4.2 board.
The v4.3 board came with the 32KHz xtal already mounted.
Have a close look - you will see X1, X2 and Y1 - those are the 3 xtals on the schematic, being 32KHz RTC, 8MHz CPU and the 26MHz synth clock respectively
переключити цитоване повідомлення
Показати цитований текст
On Tuesday, January 4, 2022, 09:27:31 a.m. EST, Stan Gammons via groups.io <buttercup11421@...> wrote: The H4 with the v4.3 board is different than the v4.2 board. Does the v4.3 board have the crystal for the RTC? 73 Stan KM4HQE On 1/4/22 7:23 AM, Larry Rothman wrote: I'm sorry you damaged your unit - you really need to be very experienced at SMT soldering to try attaching anything to that processor chip.
The iron tip needs to be like a needle and you need a microscope. Without those 2 items at a minimum, you'll cause some damage.
This is what my older Nanovna-H looks like with a xtal (this mod IS difficult!): https://groups.io/g/nanovna-users/message/23632
Any time I've indicated adding the xtal to the H4, I've mentioned the PC14,15 pins at the edge of the H4 pcb.
There are even a few photos of this: https://groups.io/g/nanovna-users/message/14447
Remove the display and clean your PCB with alcohol then look at it closely to see if any damage can be corrected.
Good luck
On Monday, January 3, 2022, 11:37:07 p.m. EST, Nicholas <n.moon@...> wrote:
I actually had the wrong pins at first (confusing schematic) and by the time I looked at the datasheet it was too late and the damage has been done and now after attempting to clean up the IC the device is dead, no power. I just have the wrong soldering iron and a tutorial would have helped a bit from someone who has done this before. I did not know there was a hole for this before I started and assumed the crystal had to be tacked onto the IC its self.
|
|
|
OK, you have the H4 v4.2 PCB so you will see PC14 & PC15 on the edge connector. You need to add the 32KHz xtal as in this post: https://groups.io/g/nanovna-users/message/13847The H4 4.3 board already has the 32KHz xtal on it and does NOT have both PC14 & PC15 on the edge connector. As for a crystal, I have used generic 32KHz xtals from scrap PC motherboards on 4 different nanoVNAs without any problems - so save some money and grab a used xtal.
|
I know this is an old thread, so sorry about that in advance. I just bought a legit NanoVNA v4.3 that does NOT have a microSD slot or 32KHz clock crystal. Updated to DiSlord v1.2.24 firmware from ttrftech 0.5.0 without difficulty. I have two questions.
1) To which pads do I solder the 32KHz xtal?
2) Where is the best place to buy a MicroSD slot to add to the board?
Thanks in advance and Merry Christmas to all,
Mark, W1MM
|
Mark,
Just because there is a slot on the board it doesn't mean that just adding the the carriage will make it work. There may be other components that have to be added and there has to be a firmware that can communicate with it. I haven't tried the Android software - you might consider to use the microSD slot on your cell phone.
Regards,
Andy
|
On Sun, Dec 24, 2023 at 04:04 PM, Andrew Harman wrote:
Mark,
Just because there is a slot on the board it doesn't mean that just adding the
the carriage will make it work. There may be other components that have to be
added and there has to be a firmware that can communicate with it. I haven't
tried the Android software - you might consider to use the microSD slot on
your cell phone.
Regards,
Andy
My mistake for trusting the sticker on the back of the box that said v4.3. Cracked it open again to take another look. This is very clearly a v4.2 board, complete with PC14/PC15 pads. 9 pin Micro SD card connectors are on order. 32.768KHz xtal will not be difficult for me to find in a quartz clock somewhere in my junk pile.
|
Hi All (first post here) sorry agout my english, Mark, if you didn't already, you can find the schematic here: https://github.com/hugen79/NanoVNA-H/blob/master/doc/Schematic_NanoVNA-H4_REV4_3.pdfWhere it says sd-card not supported, obviously there may be changes that can be done for it to work, but probably with hardware (and obviously firmware) modifications, but hardly with populating free spaces only if it says it is not supported. Good luck. Pedro (Portugal)
On Tuesday, December 26, 2023 at 02:24:05 AM GMT, W1MM <mark@...> wrote: On Sun, Dec 24, 2023 at 04:04 PM, Andrew Harman wrote:
Mark,
Just because there is a slot on the board it doesn't mean that just adding the
the carriage will make it work. There may be other components that have to be
added and there has to be a firmware that can communicate with it. I haven't
tried the Android software - you might consider to use the microSD slot on
your cell phone.
Regards,
Andy
My mistake for trusting the sticker on the back of the box that said v4.3. Cracked it open again to take another look. This is very clearly a v4.2 board, complete with PC14/PC15 pads. 9 pin Micro SD card connectors are on order. 32.768KHz xtal will not be difficult for me to find in a quartz clock somewhere in my junk pile.
|
переключити цитоване повідомлення
Показати цитований текст
On Tuesday, December 26, 2023 at 10:05:34 AM GMT, Pedro J via groups.io <pedrojar@...> wrote: Hi All (first post here) sorry agout my english, Mark, if you didn't already, you can find the schematic here: https://github.com/hugen79/NanoVNA-H/blob/master/doc/Schematic_NanoVNA-H4_REV4_3.pdfWhere it says sd-card not supported, obviously there may be changes that can be done for it to work, but probably with hardware (and obviously firmware) modifications, but hardly with populating free spaces only if it says it is not supported. Good luck. Pedro (Portugal) On Tuesday, December 26, 2023 at 02:24:05 AM GMT, W1MM <mark@...> wrote: On Sun, Dec 24, 2023 at 04:04 PM, Andrew Harman wrote:
Mark,
Just because there is a slot on the board it doesn't mean that just adding the
the carriage will make it work. There may be other components that have to be
added and there has to be a firmware that can communicate with it. I haven't
tried the Android software - you might consider to use the microSD slot on
your cell phone.
Regards,
Andy
My mistake for trusting the sticker on the back of the box that said v4.3. Cracked it open again to take another look. This is very clearly a v4.2 board, complete with PC14/PC15 pads. 9 pin Micro SD card connectors are on order. 32.768KHz xtal will not be difficult for me to find in a quartz clock somewhere in my junk pile.
|
Pedro, that annotation on the schematic that says the SD card is "not currently supported" was referring to the firmware at the time. Since then, the firmware has been updated to fully support the SD card. Just adding the slot hardware on version 4.2 and 4.3 of the H4 board will indeed enable SD card functionality if you have any recent firmware version. Most, if not all 4.3 hardware cards and many of the 4.2 cards manufactured by hugen had the slot hardware already installed, since he knew firmware support was on the way. On Tue, Dec 26, 2023, 3:05 AM Pedro J via groups.io <pedrojar= yahoo.com@groups.io> wrote: Hi All (first post here) sorry agout my english, Mark, if you didn't
already, you can find the schematic here:
https://github.com/hugen79/NanoVNA-H/blob/master/doc/Schematic_NanoVNA-H4_REV4_3.pdf
Where it says sd-card not supported, obviously there may be changes that
can be done for it to work, but probably with hardware (and obviously
firmware) modifications, but hardly with populating free spaces only if it
says it is not supported.
Good luck.
Pedro (Portugal)
On Tuesday, December 26, 2023 at 02:24:05 AM GMT, W1MM <mark@...>
wrote:
On Sun, Dec 24, 2023 at 04:04 PM, Andrew Harman wrote:
Mark,
Just because there is a slot on the board it doesn't mean that just
adding the
the carriage will make it work. There may be other components that have to be
added and there has to be a firmware that can communicate with it. I haven't
tried the Android software - you might consider to use the microSD slot on
your cell phone.
Regards,
Andy
My mistake for trusting the sticker on the back of the box that said v4.3.
Cracked it open again to take another look. This is very clearly a v4.2
board, complete with PC14/PC15 pads. 9 pin Micro SD card connectors are on
order. 32.768KHz xtal will not be difficult for me to find in a quartz
clock somewhere in my junk pile.
|
Second one is really v3.4.2, not 4.2. No matter. The v4.3 is very close to 4.2. The first part of my journey has been a total success. Scrounged in the shack a bit for a couple of unused devices just laying around. Cheap swag stopwatch I picked up at Lime Rock Raceway a long time ago and a junky IR thermometer. Both have clock function. Both have the 32.768KHz xtals in them. Literally anything with an embedded clock function will have one. Quartz clocks, computer mobo's, you name it. I chose to trash the junky stopwatch. Xtal installed. Works perfect.
Ordered the Micro SD connectors from China. Have to wait until 1st or 2nd week of January to try that mod. I am equally optimistic for that one too.
73'
Mark, W1MM
|
aww... cool! I guess I misread the annotation.
переключити цитоване повідомлення
Показати цитований текст
On Tuesday, December 26, 2023 at 04:19:18 PM GMT, Stan Dye <standye@...> wrote: Pedro, that annotation on the schematic that says the SD card is "not currently supported" was referring to the firmware at the time. Since then, the firmware has been updated to fully support the SD card. Just adding the slot hardware on version 4.2 and 4.3 of the H4 board will indeed enable SD card functionality if you have any recent firmware version. Most, if not all 4.3 hardware cards and many of the 4.2 cards manufactured by hugen had the slot hardware already installed, since he knew firmware support was on the way. On Tue, Dec 26, 2023, 3:05 AM Pedro J via groups.io <pedrojar= yahoo.com@groups.io> wrote: Hi All (first post here) sorry agout my english, Mark, if you didn't
already, you can find the schematic here:
https://github.com/hugen79/NanoVNA-H/blob/master/doc/Schematic_NanoVNA-H4_REV4_3.pdf
Where it says sd-card not supported, obviously there may be changes that
can be done for it to work, but probably with hardware (and obviously
firmware) modifications, but hardly with populating free spaces only if it
says it is not supported.
Good luck.
Pedro (Portugal)
On Tuesday, December 26, 2023 at 02:24:05 AM GMT, W1MM <mark@...>
wrote:
On Sun, Dec 24, 2023 at 04:04 PM, Andrew Harman wrote:
Mark,
Just because there is a slot on the board it doesn't mean that just
adding the
the carriage will make it work. There may be other components that have to be
added and there has to be a firmware that can communicate with it. I haven't
tried the Android software - you might consider to use the microSD slot on
your cell phone.
Regards,
Andy
My mistake for trusting the sticker on the back of the box that said v4.3.
Cracked it open again to take another look. This is very clearly a v4.2
board, complete with PC14/PC15 pads. 9 pin Micro SD card connectors are on
order. 32.768KHz xtal will not be difficult for me to find in a quartz
clock somewhere in my junk pile.
|
Only thing I might change (when my SD card connectors show up from China) is to add the 9pF caps to either side of the xtal. As is, it gains about 10 seconds/day.
Oh the horror of it all! Hi hi.
|
Here's a strange one…
I recently bought some brand new 32.768 MHz crystals from DigiKey. I disconnected the battery on my NanoVNA-H4 v4.2.1 then soldered a crystal on pads PC14 and PC15 at the edge of the pcb. I reconnected the battery, turned on the power switch and nothing… just a black screen! Huh? I knew it was working fine before I added the crystal.
With the power switch still on, I measured the voltage at the battery connector and found it to be 1.9 volts. What? A dead battery? No way! I quickly turned the power switch back off, disconnected the battery, and measured the voltage at the battery's connector. It was 3.90 volts. Hmmm. I plugged the battery back in and WITHOUT turning the power switch on, I still measured 3.90 volts at the connector on the pcb. I turned the power switch back on and again measured only 1.9 volts still with a black screen on the NanoVNA.
Next I turned the power switch off again then clipped both of the crystal's leads to completely remove it. I turned the power switch back on (no crystal now) and the NanoVNA booted right up! Voltage measured 3.90 at the battery connector with power on.
I checked the crystal for an internal short but didn’t find anything.
For some reason my NanoVNA-H4 really does not like having a crystal added for the RTC! Is there something I'm missing about this mod?
Oh, almost forgot to mention I'm using DiSlord's latest firmware v1.2.40.
|
The crystal should be brand new 32.768 kHz, not 32.768 MHz !!!
|
Mark, W1MM
AA7US