[Fourlanders] FW: [VHFcontesting] My sequencer project

[Rogers, Ron]

Could probably be used as a Ballistic Pyro sequencer for building demolitions, too ! 


Ron 
WW8RR 


-----Original Message-----
From: fourlanders-bounces at contesting.com [mailto:fourlanders-bounces at contesting.com] On Behalf Of Jim Worsham
Sent: Monday, May 10, 2010 2:20 PM
To: 'Fourlanders'
Subject: [Fourlanders] FW: [VHFcontesting] My sequencer project

Check this out.  Now that is a sequencer!

73
Jim, W4KXY


It doesn't matter how beautiful your theory is, it doesn't matter how smart you are.  If it doesn't agree with experiment, it's wrong.
Richard P. Feynman
-----Original Message-----
From: vhfcontesting-bounces at contesting.com
[mailto:vhfcontesting-bounces at contesting.com] On Behalf Of John D'Ausilio
Sent: Monday, May 10, 2010 12:22 PM
To: (Radio) VHF Contesting; Microwave
Subject: [VHFcontesting] My sequencer project

The Intergalactic Roving Battle Jitney has undergone many a transformation since the day I drove it away from Bill's house, and one of the first ones was the consolidation of all of the microwave sequencing and switching into a single box. The sequencing was done by a DEMI TRS connected to a hand-wired board full of reed relays, and based on an input from my band decoder it would steer sequencing signals to the correct amps/relays/transverters/preamps for the selected band.

This winter I felt it was time to re-rebuild the microwave box, and I decided I'd put all the hand-wired sequencing stuff on a PCB.

You can see the result at
http://www.facebook.com/album.php?aid=423406&id=828010222&l=2d7896fd87

The board accepts a PTT-L input and either 3 binary bits (normal or
inverted) or 8 individual ground-per-band inputs to select a band. The sequencer circuit is pretty much identical to the TRS except done all in surface mount. Sequencer step 4 is hard-wired to a PTT-OUT connector. Steps 1-3 route to a set of 3 connectors per band, and each step can be jumped to provide +12 or ground when active.

The main goal was to get rid of all the messy wiring .. this board will mount to the rear panel of a 4U box I'm using and all of the phono jacks on the rear will protrude through the many holes I still need to drill in it ;)

de w1rt/john
_______________________________________________
VHFcontesting mailing list
VHFcontesting at contesting.com
http://lists.contesting.com/mailman/listinfo/vhfcontesting


_______________________________________________
Fourlanders mailing list
Fourlanders at contesting.com
http://lists.contesting.com/mailman/listinfo/fourlanders