Re: cheap testing

From	Joe Gwinn <joegwinn@comcast.net>
Newsgroups	sci.electronics.design
Subject	Re: cheap testing
Date	2025-10-23 18:41 -0400
Message-ID	<eablfkt1ehtqsno0toq2k0kutj1si7h04h@4ax.com> (permalink)
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On Wed, 22 Oct 2025 07:17:15 -0700, john larkin <jl@glen--canyon.com>
wrote:

>On Wed, 22 Oct 2025 08:52:40 GMT, Jan Panteltje <alien@comet.invalid>
>wrote:
>
>>>john larkin <jl@glen--canyon.com>wrote:
>>>>On Tue, 21 Oct 2025 23:20:09 +0100, JM
>>><sunaecoNoChoppedPork@gmail.com> wrote:
>>>
>>>>On Tue, 21 Oct 2025 11:43:19 -0700, john larkin <jl@glen--canyon.com>
>>>>wrote:
>>>>
>>>>>We're testing a proto board. I'm temperature compensating a 50 MHz LC
>>>>>oscillator.
>>>>>
>>>>>The beer cooler is a great benchtop temperature chamber, for about
>>>>>$35. I didn't have a frequency counter here, so I bought that one from
>>>>>Amazon for $70.
>>>>>
>>>>>The beer thing heats and cools at about 1.5 deg c per minute, so a
>>>>>temp sweep leaves time to do other things. Kinda like Spice.
>>>>>
>>>>>The setup really needs the fan inside the cooler.
>>>>>
>>>>>The window is cool. I can see the LEDs blinking.
>>>>>
>>>>>https://www.dropbox.com/scl/fo/k506jnwlvdz0stxmfkyck/AP-coSSFwLNgfZk1_TOZn18?rlkey=h9zitd71looudqxsredr3sg01&dl=0
>>>>>
>>>>>
>>>>>
>>>>>John Larkin
>>>>>Highland Tech Glen Canyon Design Center
>>>>>Lunatic Fringe Electronics
>>>>
>>>>Ikea should never have stopped making these jerker desks, they are
>>>>ideal for an office workbench.
>>>
>>>Those two oscilloscopes must weigh 100 lbs together. That bench is
>>>plenty strong.
>>>
>>>But there's something weird about the Ikea varnish that makes most
>>>optical mouses not work.
>>
>>I am using an Ikea table to do all computing, mouse works great on the white surface:
>> https://panteltje.nl/pub/4_keyboards_IXIMG_0913.JPG
>>Easy to connect a vice to it too, weight no problem,
>>in use now for more than 25 years, Ikea makes great stuff.
>
>Ours have a varnish finish. LED-type mice don't work. 
>
>There is a Dell laser mouse that works.

I had these problems as well.  The issue is that many things are
featureless in the IR or even red, so there is nothing to track or
correlate.

What really works are mice with a blue laser.

What has replaced al mice for me is a Lenovo model MB230B.

.<https://www.amazon.com/Lenovo-Bluetooth-Adjustable-Notebook-Compatible/dp/B09WF6649J>

Joe

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cheap testing john larkin <jl@glen--canyon.com> - 2025-10-21 11:43 -0700
  Re: cheap testing ehsjr <ehsjr@verizon.net> - 2025-10-21 16:27 -0400
  Re: cheap testing JM <sunaecoNoChoppedPork@gmail.com> - 2025-10-21 23:20 +0100
    Re: cheap testing john larkin <jl@glen--canyon.com> - 2025-10-21 18:52 -0700
      Re: cheap testing Jan Panteltje <alien@comet.invalid> - 2025-10-22 08:52 +0000
        Re: cheap testing john larkin <jl@glen--canyon.com> - 2025-10-22 07:17 -0700
          Re: cheap testing Gerhard Hoffmann <dk4xp@arcor.de> - 2025-10-22 16:57 +0200
            Re: cheap testing Jan Panteltje <alien@comet.invalid> - 2025-10-22 17:21 +0000
              Re: cheap testing john larkin <jl@glen--canyon.com> - 2025-10-22 17:46 -0700
                Re: cheap testing Jan Panteltje <alien@comet.invalid> - 2025-10-23 07:36 +0000
          Re: cheap testing Joe Gwinn <joegwinn@comcast.net> - 2025-10-23 18:41 -0400

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