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 Forum index » DIY Hardware and Software » The layout factory
808 Handclap (almost there)
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jbeuckm



Joined: Nov 30, 2008
Posts: 165
Location: Stockholm
Audio files: 9

PostPosted: Thu Aug 27, 2015 5:46 pm    Post subject: 808 Handclap (almost there) Reply with quote  Mark this post and the followings unread

The simple noise envelope is working but the clackity clack is not happening. Help me debug!

I substituted the BA6110 but did not build the current mirror as suggested here: http://www.firstpr.com.au/rwi/dfish/TT-303/click-fix/

Could that be the problem?

Eagle files are here:

https://github.com/jbeuckm/808-Handclap


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LFLab



Joined: Dec 17, 2009
Posts: 492
Location: Rosmalen, Netherlands

PostPosted: Fri Sep 04, 2015 4:23 am    Post subject: Reply with quote  Mark this post and the followings unread

Started to have a look at this one in Eagle, I used your schematic, but started to reroute to have all resistors lying down, a bit more compact, and adjustments for parts which I have in my bin.

I'll try to spot mistakes before committing this to an iTEAD order Very Happy

Did you see these?
Yocto build tips
E-licktronic (Yocto) errata
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jbeuckm



Joined: Nov 30, 2008
Posts: 165
Location: Stockholm
Audio files: 9

PostPosted: Fri Sep 04, 2015 7:14 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks! I'm pretty excited to get home and flip C144... There are plenty of things to measure and try here.
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jbeuckm



Joined: Nov 30, 2008
Posts: 165
Location: Stockholm
Audio files: 9

PostPosted: Tue Apr 26, 2016 9:03 am    Post subject: Reply with quote  Mark this post and the followings unread

@LFLab Any luck? I have restarted this layout from the Yocto eagle file. I probably had a bad connection or wrong value on my first version. Also, I am moving to 2N390x transistors this time to avoid any pinout variations. I'm doing the reverb mod too.
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LFLab



Joined: Dec 17, 2009
Posts: 492
Location: Rosmalen, Netherlands

PostPosted: Tue Apr 26, 2016 9:17 am    Post subject: Reply with quote  Mark this post and the followings unread

I actually did a layout....for the 909 clap Very Happy
Nothing going on on my end on the 808 clap.
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jbeuckm



Joined: Nov 30, 2008
Posts: 165
Location: Stockholm
Audio files: 9

PostPosted: Tue Apr 26, 2016 9:36 am    Post subject: Reply with quote  Mark this post and the followings unread

Very similar circuit. Which OTA did you use?
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LFLab



Joined: Dec 17, 2009
Posts: 492
Location: Rosmalen, Netherlands

PostPosted: Tue Apr 26, 2016 11:36 am    Post subject: Reply with quote  Mark this post and the followings unread

CA3080, usually I'd replace this with 13700, but for the life of me I couldn't figure out what to do with the other section, and I do have quite a few of them around.
It only exists in Eagle now though Smile I used hexinverters neinohnein schematic, so that should be good.

I have some grief with the Yusynth Quadrature LFO to deal first Crying or Very sad
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jbeuckm



Joined: Nov 30, 2008
Posts: 165
Location: Stockholm
Audio files: 9

PostPosted: Tue Apr 26, 2016 2:45 pm    Post subject: Reply with quote  Mark this post and the followings unread

Oh that's easy - use the other half of your 13700 to CV the reverb level Wink
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jbeuckm



Joined: Nov 30, 2008
Posts: 165
Location: Stockholm
Audio files: 9

PostPosted: Wed Apr 27, 2016 8:55 pm    Post subject: Reply with quote  Mark this post and the followings unread

Woohoo - verified! I had to change C140 to 27n to get separated hits (2n7 in the service manual). This has reverb level on a 16mm edge pot. Requires separate noise source.

https://github.com/jbeuckm/808-Handclap/releases/tag/v0.1


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LFLab



Joined: Dec 17, 2009
Posts: 492
Location: Rosmalen, Netherlands

PostPosted: Thu Apr 28, 2016 3:28 am    Post subject: Reply with quote  Mark this post and the followings unread

Very nice! cheers
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ADMST



Joined: Oct 27, 2016
Posts: 2
Location: NYC

PostPosted: Mon Dec 12, 2016 12:38 am    Post subject: Reply with quote  Mark this post and the followings unread

Man, your work is inspiring! Will this design run at +/- 15v ??
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jbeuckm



Joined: Nov 30, 2008
Posts: 165
Location: Stockholm
Audio files: 9

PostPosted: Tue Dec 13, 2016 8:08 am    Post subject: Reply with quote  Mark this post and the followings unread

Yes. The original was 15v afaik. I think I actually used a +-15V power supply on mine through a euro connector.
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ADMST



Joined: Oct 27, 2016
Posts: 2
Location: NYC

PostPosted: Tue Dec 13, 2016 11:18 am    Post subject: Reply with quote  Mark this post and the followings unread

Amazing. Thank you!
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artilect99



Joined: Oct 01, 2018
Posts: 36
Location: USA

PostPosted: Wed May 29, 2019 4:07 pm    Post subject: Reply with quote  Mark this post and the followings unread

Sorry for the noob question, but I've never had a PCB fabbed before. How exactly does one go about getting a PCB made from files such as these? Do I need eagle in order to convert them to gerber files?
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