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Adding external reset to Baby10
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whomper



Joined: Dec 15, 2007
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Location: Israel
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PostPosted: Fri Apr 09, 2010 1:54 pm    Post subject: Adding external reset to Baby10 Reply with quote  Mark this post and the followings unread

Hi,

I have a working Baby10 that I would like to add an external Reset to. The Reset signals could come from modules like the master divider, LFO or any other source.

When connecting them directly to the Reset input, I got no reset function. Have read somewhere that one needs at least 1/2 of the voltage for a Reset to work (am operating with 15v) and the gates that I have are about 4-5v tops.

Should I opt to amplify the signal with an op amp? Any other thoughts?

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Dave Kendall



Joined: May 26, 2007
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PostPosted: Fri Apr 09, 2010 3:57 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hi mate.

It might be a good idea to use a comparator circuit like found on the gate and reset inputs on the schematic here

That way you can use a wide variety of gate sources, even square waves from LFOs etc. and never have to warry about their amplitude....

cheers,
Dave

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mistercooper



Joined: Jul 17, 2006
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Location: Seattle

PostPosted: Sat Apr 10, 2010 3:10 am    Post subject: Reply with quote  Mark this post and the followings unread

Ken notes "A 100k resistor should be soldered from the Reset input to 0V/GND. This is a non-critical modification, and will only really be needed if you try to reset the unit with a signal that can source but not sink current. e.g. a switch wired to the +15V rail." Dunno if that would fix what you are talking about...
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whomper



Joined: Dec 15, 2007
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PostPosted: Sat Apr 10, 2010 3:19 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for the thoughts Dave and mistercooper.

I had a spare gate2trigger channel in my Baby10 (the other one is used for the Clock) and it works like a charm!

Now I can try reseting the baby10 with external control to give it some extra life (similar in concept to the Q963, although without manual intervention).

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