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Sweeperino (for Specan) not displaying frequency
Hi,? ?I am nearing the end of a journey, slaying a few dragons. I can run Sweeperino on my Arduino Uno,? but it doesn't display the Frequency numbers on the LCD line 1. I can see a quick flash of
By Nigel Maund · #2050 ·
Re: Active probe
Interesting? thread.? I'm building basically the same circuit but adding an AD8008 opamp. My goal is hopefully to be able to see in the area of -90 to -100dBm.? I plan to use it with my spectrum
By Peter Ayearst · #2049 ·
HB - GPS disciplined Signal Generator
Incredibly accurate. First picture shows .30Hz accuracy at 10,000,000 Hz. Second picture shows accuracy at 160,000,000 Hz. The sig gen had been in a cold garage and had only warmed up until a gps fix.
By Mitch W4OA · #2048 ·
Re: Active probe
Agree with those saying using a series diode instead of in parallel with the input. Why sacrifice the diode D1 and most probably the coil L1 if you can put the diode in series which offers the same
By Lawrence Galea · #2047 ·
Re: Active probe
My opinion: The BF998 datasheet says typical transconductance (y21s) = 24ms. The output Z of a source follower is the inverse of that, that is 42 ohm, already lower than the Zo of the coax, so no need
By Daniel Ricardo Perez · #2046 ·
Re: Active probe
L1 may or may not be necessary, but may be a good idea if you are running the probe from a switching power supply, which are quite common these days, and which are notoriously dirty.? If the power
By Jim Allyn - N7JA · #2045 ·
Re: Active probe
I built that above active probe from a UK kit. Two comments regarding the schematics. The reverse voltage supply protection "works" by shorting the supply if the polarity is not correct. Depending on
By Peter · #2044 ·
Re: Homebrew spectral analyzer
On Mon, Sep 25, 2023 at 01:28 AM, m0wid wrote: > > No - way too complicated for me.? I meant the index.html file.? ?Towards > the end is the stuff about connecting and handling the messages.?
By blackberryer · #2043 ·
Re: Homebrew spectral analyzer
No - way too complicated for me.? I meant the index.html file.? ?Towards the end is the stuff about connecting and handling the messages.? First part is mainly setting the controls and the chart.
By m0wid · #2042 ·
Re: Homebrew spectral analyzer
I also don't know about the websocket protocol, I just made a basic attempt, in fact, as you said, ESP32_DISPLAY there will be too slow problems, the javascript code you mentioned, is the suffix
By blackberryer · #2041 ·
Re: Homebrew spectral analyzer
An interesting idea. As you say why bother when you can use a tablet or phone, but I fully agree its fun to play with these ideas! There should be no need to change the ESP32-RF code at all, at least
By m0wid · #2040 ·
Re: Homebrew spectral analyzer
I started tossing again,?I saw the TinySA project a long time ago, the interesting thing about the SimpleSA project is that it uses arduino, the Simple name is indeed very suitable, for me, it is
By blackberryer · #2039 ·
Re: Homebrew spectral analyzer
Hi, I am away at the moment and cannot check what is present on my modules. I suggest leaving them on but if you have problems then remove one at a time. The capacitance will likely reduce noise but
By m0wid · #2038 ·
Re: Homebrew spectral analyzer
The other module no capacitor on leg 15 SCLK
By Gerard · #2037 ·
Re: Homebrew spectral analyzer
For your information I found a small difference between these 2 modules SI4432 There is a capacitor between the SCLK signal leg 15 of the si4432 and ground, and not on the other. Any importance?
By Gerard · #2036 ·
Re: Homebrew spectral analyzer
Bro, are you still researching? Will your designs be shared? Looks like your design is a very nice design. Seems like we're from the same country.
By radio man · #2035 ·
Re: Homebrew spectral analyzer
Excellent - well done! Dave
By m0wid · #2034 ·
Re: Homebrew spectral analyzer
YES it's WORK the way? is? to do from the main menu of the arduino program to put these data in? the ESP?? Via OPTION: ESP steck data upload?? Nice!! Thank's cdt
By Gerard · #2033 ·
Re: Homebrew spectral analyzer
re, *When you talk about this data folder* , I have one in:? ?documents/arduino/SimpleSA/SimpleSA I renamed it and put yours *Is this the right manipulation?* *Or the way? is? to do from the main
By Gerard · #2032 ·
Re: Homebrew spectral analyzer
Hi.? I wonder have you sent the revised files in the Data folder to the ESP32? The required files for the web pages are uploaded separately to the main sketch. A copy of the folder is attached. Dave
By m0wid · #2031 ·