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Hi Vaclav, (or is it Sal?) Welcome to the forum.? The wiki and files sections of this forum are evolving carefully in order to provide members with specific device and theory related information. I

Good discussion going on. Let me ask it this way. I think the designer of the NanoVNA was pretty competent. That leads to the question - why did that designer put the Schottky diode SD103AWS, coming

My device ran for just over 2 hours after charging, but the battery drains //relatively// quickly after removing 5V. I found this in reference manual Table 32. Typical and maximum current consumption

Wow, thanks! Raymond

That's why I said "...and one decimal...", meaning between 3.6 and 4.2V indication nominally. But one more decimal is fine of course if you like although the accuracy of that number isn't there. And V

In my experience if an app is not downloadable from Google Play Store because it does not support your phone version, then you will not be able to side load it either. At install you generally receive

I tested it again this morning and it still works perfectly. Bob

It looks like battery overcharge protection was triggered.This may happens if defective IP5303 overcharge battery, in order to avoid fire, it has over-charge and over-discharge protection circuit (you

Very unlikely: We are calling code that runs in nanoVNA "firmware" and it is compiled from C Python is one of several languages used in PC software for data from nanoVNA via USB. You find some Python

Here is my measurement. Capacity in percents is calculated from time. The battery worked 122 minutes from full charge until power off due to over-discharge battery protection. The percent on the Y

This is good to know. I found the reference that says VBAT = 1.65 to 3.6 V >> so if the IP5303 cuts out at 3V, VBAT will see 2.4V (nominally), which is well above 1.65. I was thinking that the IP5303

Herb, appreciate your comments. First I have to say that starting the reply with "IF " is condescending. Maybe it is my computing background which ALWAYS follows "IF" with condition. However, even

Hi QRP - I used a 1N4148a.. I supposed that some small ESD while soldering kicked the IP5303; it only that one time played "dead"

That looks like the Battery from an old Motorola RAZR Cell-Phone. They are still available on e-Pay for short money. 73, Dick, W1KSZ ________________________________ Sent: Monday, October 21, 2019

For now, as long as it's working, I am not going to fix it.? When the ICs arrive I will decide whether to replace or not, depending on how well it's been working in the interim. I spent about $4 to

I don't trust those small micro-USB connectors so I use a micro-USB to USB A adapter cable for any equipment requiring frequent connections. Mike N2MS

Could somebody help me to implement cloned NanoVNA software using Eclipse Python plug-in? I have my first Python running on Eclipse IDE , I have cloned the NanoVNA , however, I am not sure how to

IMHO, Yes there are no stupid questions but there are uninformed ones. Directing new members to this group's "Wiki" and "Files" section is not condescending. If they were aware of those resources they

Yesterday I implemented a new command "vbat_offset" to allow calibrate battery voltage measurement for NanoVNA. Also I tested battery for two full cycles with voltage measurement (with external

This is not true. The diodes make sure that no input rises above Vdd+0.6V, whatever Vdd is, to a certain extent. The 4V max is the maximum voltage "acceptable" to be applied Also, not true in itself.