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Re: tiny board

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John Larkin wrote
>This is my hack for testing the dual-fet board:
>
>https://www.dropbox.com/s/fahyykwsjerh10y/Z440_C.JPG?raw=1
>
>This will work for the old single-fet version too.

OK, that will give rise-time depending on circuit wiring - and scope lead capacitance I suppose.
If you were to drive it with a ramp on one scope channel,
it could give the pinch of point / transfer. 

I don't know this transistor, suppose it is very fast,
the chip on that mouse byte board only shows 'LXE'

I have some Sirenza VCOs that use a similar mouse byte PCB,
have not had any problems with that in prototyping

Been coding a Linux test program for the LMX2332 PLL chip,
very hard to read datasheet,
could not register on TI site to download their windows program,
so writing my own.

What could have been done in 10 lines in that datasheet,
is done over many pages with bit numbers in reverse,
starting bytes at bit 1, not 0,
and all sort of other strange things.
Maybe made by some intern or something,
maybe same person did their website..


It strongly reminded me of than bomb defusing manual
1) turn big screw 180 degrees left.
2) before you do that pull pin out of hole.
3)


Made some test cable for testing via PC par port,
and got some parts together to test and build that LMX2332
based board.
 http://panteltje.com/pub/par_port_test_cable_and_parts_LNB_PLL_IMG_6622.JPG
 
I like those cheap vero type boards with round isles,
fits exactly in alu housing too.
SMDs fit exactly between 2 isles.

I am writing code in C on the PC and test that chip,
then will rewrite it in PIC asm for the on-board PIC.
At least that is the plan.
If the C program works as I hope,
then I will release it open source so people are freed from that TI windows stuff.
Will be a command line tool though, its simple enough not to need any graphics.
if you can figure out that datasheet that is:
 http://panteltje.com/pub/LMX2332_registers.gif
  picture is copyright TI I think, from their datasheet...




 

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tiny board John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-09 20:22 -0700
  Re: tiny board <698839253X6D445TD@nospam.org> - 2018-10-10 06:30 +0000
    Re: tiny board tabbypurr@gmail.com - 2018-10-10 02:39 -0700
      Re: tiny board <698839253X6D445TD@nospam.org> - 2018-10-10 14:08 +0000
        Re: tiny board tabbypurr@gmail.com - 2018-10-10 08:34 -0700
    Re: tiny board DecadentLinuxUserNumeroUno@decadence.org - 2018-10-10 09:54 +0000
    Re: tiny board John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-10 07:43 -0700
    Re: tiny board John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-10 11:12 -0700
      Re: tiny board <698839253X6D445TD@nospam.org> - 2018-10-10 19:12 +0000
        Re: tiny board John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-10 12:26 -0700
          Re: tiny board <698839253X6D445TD@nospam.org> - 2018-10-12 17:57 +0000
            Re: tiny board John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-12 12:55 -0700
              Re: tiny board <698839253X6D445TD@nospam.org> - 2018-10-13 06:59 +0000
                Re: tiny board John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-13 08:54 -0700
                Re: tiny board <698839253X6D445TD@nospam.org> - 2018-10-13 18:19 +0000
  Re: tiny board George Herold <gherold@teachspin.com> - 2018-10-10 06:40 -0700
    Re: tiny board John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-10 07:38 -0700

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