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For $1.40 you can get a STM32F103C8T6 "bluepill" board that is 3.3V (with some 5V tolerant pins) and you would not have to bother with a level shifter.

I used an I2C level shifter module with 4 level shifters, which I purchased on eBay (approx EUR 1.95). This does a conversion between the low and the high voltage in a bi-direction way: For the 5th

Be carefully The attenuator may have pull down resistors and the si4432 does not and you will destroy the si4432 -- HBTE Files section: /g/HBTE/files Erik, PD0EK

I am going to try red LEDs in series like someone did in their attenuators design. Yes, SDO should be ok with direct connection. 73, Gary Wb6ogd

@Joerg Can you share the schematics of the 5v->3.3v IO conversion you used with the Arduino nano I guess you only need voltage dividers for the CLK, SDI and two LE lines and no conversion for the

THANK YOU thank you Erik! You didn't have to do that, we would have figured it out eventually. Compiles just fine for Nano now even with local display/encoder...? construction can resume. Edit:?

Arduino code pushed to Github https://github.com/erikkaashoek/tinySA Rotary and display disabled by default Also some other code size reductions done and comment added Documentation also added to

I?tested two modules?in series?with PE4302 made by SV1AFN and it seems that the attenuation of insertion at 10Mhz is around 0.45dB each. Daniel ,YO8SAK

If this is not too much of a hassle please create a "fork" and post your modifications in a separate branch. That way others can follow everyone's changes easily and Erik (if he finds those changes

It is a bit weird: I made the image as a screen snapshot on a Galaxy S9 and this displays it correctly also through the link, as well as on my laptop running Windows 10 with the Chrome

I am using a Arduino zero clone that uses the nano footprint. If you only use the SPI interface you only need one input level shifter At the top of tinyAS.ino are three defines you can comment out to

Hosting the code on github is always a good idea, anyone can pull previous versions in case of issues. Also, looks like your new code already only supports the serial PE4302, I

So Erik, what Arduino board are you using??? Build doc sure looks like it was Nano before at least. You are moving so fast, I can't keep up!? No problemo, keep it up, I will try to follow. Your

It doesn't and it makes no difference whether one receives the messages via email. The linked images

I guess, you receive the postings as e-mails. The boxes stand for the pictures in the posting, which show the changed code. If you open

I found a nice serial interface module with a PE4302 on eBay. Looks very nice with good shielding when connected to the tinySA It only requires the shared SPI clock and data lines and a dedicated?

Hello Joerg, Like Gary I intended to use a Nano as the controller, Partly because I have several of them, and the Due is so much more expensive. It was also because I assumed that Erik's emphasis on

As the SPI interface in the tinySA is completely done in SW you can change all pins to whatever you want. -- HBTE Files section: /g/HBTE/files Erik, PD0EK

Gary, I think Erik is using an Arduino Due, which does not have TxD and RxD connected to D1 and D0. I have been using a Nano together with 5V<->3.3V level converters and I also changed the pin

I am starting to build my TinySa.. finally. First issue... If you use pin D0(RxD) and D1(TxD) for both Si4432 and USB to the PC, isn't that going to present a conflict? I have done this before but I