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 Forum index » DIY Hardware and Software » Synthasystem
Progress!
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dingebre



Joined: Aug 10, 2008
Posts: 262
Location: Salt Lake City, UT USA

PostPosted: Tue Nov 23, 2010 1:53 am    Post subject: Progress! Reply with quote  Mark this post and the followings unread

OK, so I got the Frequency Divider prototype stuffed and wired. but on initial fire up, the divide by 11 was dividing by 7, very, very weird. I discovered the one shot was not resetting, but the schematic looked good to me and I thought I checked all the components.

Nyle took over and found I had installed a 2.2k where a 22k should have been, but he also saw he forgot to put a 3.9k resistor in series with the resetting diodes for the flip-flops. Good news, replacing the 2.2k with a 22k and adding the 3.9k fixed it. The appropriate changes have been made to the schematic and I'm going to order a small run of PCBs.

Next, I finally got my sequencer stuffed and wired. It all fired up great except the A/B 16 switch isn't working right. Everything else works, which is really good news. I'll have some time over the holiday to figure it out. The early prototype Nyle stuffed was working fine, and this PCB should be identical, but I certainly have made mistakes before.

Anyway, I have enough modules done that I can make an all Steiner demo. Look for it in the next couple of weeks.

_________________
David M. Ingebretsen, M.S., M.E.
Collision Forensics & Enginering, Inc.

dingebre@3dphysics.net
http://www.xmission.com/~dingebre/Synthasystem.html
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