Electronics > RF, Microwave, Ham Radio

CB and Ham Radio Techs Love Their Bird Wattmeters

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joeqsmith:

--- Quote from: xrunner on November 08, 2024, 11:54:57 pm ---The cheap OLED display has now a permanent line on the side just for sitting in a box. What junky little pieces of crap those displays are.

--- End quote ---

Let's be fair.  The owner stored the device into a non ESD safe container with other parts and let them shake and bake.   What sort of HV do you expect it to handle?   

I remember us shipping a prototype to a customer once and it arrived DOA.   It was returned.  We opened the box to find it was placed into a box of standard foam peanuts.  The kind that build up so much charge they stick to everything and you spend hours cleaning them up.   No ESD bag or anything was used to protect the device.  :-DD   Oops... 

xrunner:

--- Quote from: joeqsmith on November 09, 2024, 12:22:16 am ---Let's be fair.  The owner stored the device into a non ESD safe container with other parts and let them shake and bake.   What sort of HV do you expect it to handle?   

--- End quote ---

I expect it to handle a lot!

I remember at work a long time ago replacing some memory on a 486 PC that had to be working for some tests. It was acting weird like the memory was bad in the middle of the day. I removed a memory stick from another MB that wasn't being used and hurriedly opened the PC and swapped out the memory. Uh but when I went to power it on ... it was already on - I hadn't turned it off and I was so worried about getting the PC going I didn't even notice the fans being on.  :o

However when I reset the PC it worked just fine. Maybe I took bad habits away from the job to my hobbies.  :-DD

A.Z.:

--- Quote from: xrunner on November 07, 2024, 11:43:41 pm ---But the simple explanation is that it is a very simple way to look over and see if your WiFi router is actually emitting RF, as a quick way to check it's operating.

--- End quote ---

not just that, using that device and a floor map, one may create a "heath map" to check for weak signal spots w/o having to carry around a computer, although if there are signals from other WiFi network the device may report incorrect data

xrunner:
I changed a few parameters in the software and now it's giving a good indication of the power levels it's detecting from the new router. The bar graph is bouncing from min to max and in between using the entire length of the OLED display as the WiFi signals are transmitted, which is the active minimalist sort of display I was looking for.

I have some nice little breakout PCBs already that the Nano board can mount on with two rows of headers. But I need to mount the PCB to a slider that goes into the aluminum case. I already have the basics of a 3D printable slide-in mounting plate from another project that used an UNO board, so I can mod that.

I need to bolt down both the Nano breakout PCB and the AD8307 PCB to the slide-in plate so the SMA ant. connection and USB Mini line up at the back plate of the case. The AD8307 PCB holes are something like M3, so I have lots of that hardware. The Nano board does have four very small holes for screws, and so does the little breakout PCB. These holes appear to be the same diameter on both parts, and the drawing for the Nano board shows the hole dia. is 1.65 mm.

The hardware to use would be M 1.6 screws and nuts, which I don't have. There are "Tiny Screws" kits on Amazon that have Metric M1 M1.2 M1.4 M1.6 M2 M2.5 so I will get one of those kits which will be good to have in any case.

I mean I could just use hot snot and glue it all together but I'm not building an advanced AI humanoid robot.

xrunner:
I did do some work on the mounting plate, but haven't test-printed it yet. Looking at the pic the AD8307 board would be on the left, and the breakout board that the Nano would be on to the right. The hardware (bolts and nuts) would be M3 on the left and M1.6 on the right .

The boards will sit back as far as needed so the back panel (yet to be designed) will simply have openings so the SMA jack and USB mini jack stick out - no extra hardware needed.

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