#082 скачать в хорошем качестве

#082

I've noticed recently that the 'Slow Boats' are shipping 'defective' nRF24L01 modules to us unsuspecting Yanks. And unless you know to even look, you'll never notice there is something wrong until you do a bit of testing... The module & antenna fit together nicely enough with threads, BUT the center conductor (where the zoomies travel) of both need to be connected in order for the antenna to work at ALL. Think of a full tank of gas and no line connecting it to the engine. Now to be fair, each end of this equation can be purchased as either pinned (male) or female (non-pinned, receptacle, not-so-sexy-description). But only ONE needs to be for things to work-not both, and certainly not none. Well, guess what... They won't fit together if BOTH have a pin, so the Chinese have found a way to get rid of their surplus that have no pins: They ship antenna and module as BOTH FEMALE! Yup. No pin at all on either one. They screw together just fine, but there is no connectivity. None. And let me assure you on one thing: THESE ARE NOT DEFECTS Both pieces are designed to have a pin on the other end, which means that nothing has broken off and flopping around between them. I show this as best I can in the video. "So what? That won't matter! Why you making a stink about it? Leave the Chinese alone!", you say? Well, let's see if you nay-sayers are right! I tested (with the old 'scanner' sketch) both the original and 'fixed' configurations, and split out and evaluated the results of having no antenna compared to having the antenna they shipped actually connected. The URL to download the excel spreadsheet is at the end of this description, so you can compare the numbers yourself. BONUS: I even included a nifty function (Macro) for you in it that takes everything in the first column and splits it into single characters, pasting them into all the columns needed to it's right. You'll see what I mean when you click on the "Developer" menu in excel. BOTTOM LINE: If you are using ANY external antenna on ANY radio module-Chinese or not-please check to make sure the right parts are screwed into each other. It might save you a ton of trouble! Spreadsheet with survey results: https://drive.google.com/open?id=0B4K... Next related video: Performance evaluation of shielding the nRF24 board with 'aluminum tape' (wireless burrito!)...