DiSEqC controller for SUP2400 - code

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G4KLB
Posts: 196
Joined: Wed May 28, 2008 10:46 am

Re: DiSEqC controller for SUP2400 - code

Postby G4KLB » Tue Mar 29, 2016 3:09 pm

This is the latest version I have made,

SUPdi.jpg
SUPdi.jpg (342.7 KiB) Viewed 2262 times


See BATC Wiki https://wiki.batc.tv/SUP2400_DiSEqC for info

RonM
Posts: 19
Joined: Wed Sep 02, 2015 11:37 am

Re: DiSEqC controller for SUP2400 - code

Postby RonM » Thu Mar 31, 2016 2:51 pm

That looks great, I like it!

73,
Ron, G7DOE
Ron G7DOE

g6pep
Posts: 5
Joined: Sun Nov 22, 2015 10:05 am

Re: DiSEqC controller for SUP2400 - code

Postby g6pep » Tue May 24, 2016 5:05 pm

g0mjw wrote:... Changing the crystal isn't easy but not impossible. In retrospect, it might have been better to destroy it with cutters as that would make de-soldering less likely to damage the PCB tracks...



Mike,

I lucked out on this point, having just seen a video on YouTube (https://www.youtube.com/watch?v=7kyaz4Zrd78), evaluating an SMD removal kit. The demo featured using the removal kit to desolder a 208-pin QFP chip. It depends on a patent alloy, supplied with the kit, which lowers the melting point of the solder already present so that you can get it molten simulataneously on all 4 sides. It's not the most dextrous demo but it illustrates the point.

Given the apparent inaccessibilty of the solder on the crystal in the SUP2400, I thought that I'd give it a go there. I first chopped the earth connection with a pair of cutters and then, after the third cycle of heating each connection in turn, the crystal just fell off the board, with tracks and crystal undamaged!

The kit is a little expensive but you don't use that much of the alloy on each job.

A bit late as a response but I thought I should report it anyway.

73, John.

MW0LLK
Posts: 10
Joined: Sat Jun 06, 2015 8:47 pm

Re: DiSEqC controller for SUP2400 - code

Postby MW0LLK » Tue Jul 05, 2016 6:01 pm

I didn't have a suitable PIC chip or programmer available but I did have a PICAxe and development board handy. This runs a form of BASIC so is horribly slow but I managed to make it work...
I've added a push button and LED to toggle the SUP2400 on and off which is handy for multi-band working.
If anyone is interested I can post the code here.

G0EID
Posts: 14
Joined: Thu Oct 17, 2013 3:19 pm

Re: DiSEqC controller for SUP2400 - code

Postby G0EID » Sun Jul 10, 2016 2:00 pm

Hi Chris,
I am interested, please post your DiSEqC code for the PICAXE.
I use a PICAXE 28x2, as a sequencer in a 70cms PA,
so interested to see if I can fit your DiSEqC code in too?
Eage2GS.jpg
Eage2GS.jpg (180.61 KiB) Viewed 1313 times

This board started life as a telemetry GroundStation for Eagle2.
There was a PICAXE 40x2 onboard the Eagle2 satellite.
73
Dave - G0EID

MW0LLK
Posts: 10
Joined: Sat Jun 06, 2015 8:47 pm

Re: DiSEqC controller for SUP2400 - code

Postby MW0LLK » Thu Jul 14, 2016 8:40 pm

*** IMPORTANT - THIS IS NOT THE CODE FOR A STANDARD PIC ***
*** ONLY USE WITH A PICAXE PROGRAMMED IN BASIC ***

Here's the PICAXE code - it uses 901 bytes of program memory on an 08M2.
For speed it's done using macros though you could get rid of the switch off command which would halve it approximately.

Hope it's helpful

*** IMPORTANT - THIS IS NOT THE CODE FOR A STANDARD PIC ***
*** ONLY USE WITH A PICAXE PROGRAMMED IN BASIC ***
Attachments
diseqc sup2400.zip
(950 Bytes) Downloaded 38 times


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