Anyone know of a breakout board for a SPM0404UD5 or any other similar ultrasonic MEMS sensor? I want to build a ultrasonic detector so I'm looking for something that can detect the presents of ultrasonic sound (if you could call it that ).
Thanks
@martim said in RF Nano = Nano + NRF24, for just $3,50 on Aliexpress:
@TheoL way to expensive.
For less money, and very little effort, you can put your own together: https://www.openhardware.io/view/480/Compact-nRF24L01-Pro-Mini-Bottom-Shield
As demonstrated, it also gives you more choice and control over the type/quality of nRF24 module that you get.
Hi,
By the PCB silk I was wrongly thinking that the module could be on of "RFM69" or "RFM69H" or "RFM69W" and "RFM69HW".
Now if I understood correctly the diagram, the module can only be either the "RFM69W" (low power 13dBm) or the "RFM69HW" (high power 20dBm).
Since this module has the "H" marked it should be "RFM69HW" and that is confirmed by the other side of it, because it has the two additional black ICs.
Thanks!
@emre299 must be something wrong with the booster. Canique Boost module (I run the site selling it) outputs 3.3V no matter if no load is attached or if 50mA or more are drawn from it. It's based on the MCP16251 chip.
I guess the ebay modules are based on chinese chips having minimum price as the one and only design goal. Years ago I've bought 2 different ebay modules myself to test them, but they were crap (unnecessary LEDs and even if they were unsoldered the modules had bad efficiency).
Thank you for your answer
I'm trying to compare with only pro mini and rfm69 on a test plate, and 2 AA batteries. I have strange result, and i'm doubting about my multimeter.
I'll continue testing and will tell you
@fifo Well done! - probably the new module needed a little extra power and the power brick was already failing so this pushed it over the edge. Failing psu can be difficult to diagnose until they fail completely, especially if encapsulated.
Power supply and cabling are usual suspects in this type of work.
Well done and good luck with the rest of the project!
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