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 Forum index » DIY Hardware and Software » The layout factory
ModularSampler Stripboard layout (ISD1820)
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emiz



Joined: May 16, 2018
Posts: 16
Location: germany
Audio files: 1

PostPosted: Sun Sep 09, 2018 5:23 pm    Post subject: ModularSampler Stripboard layout (ISD1820) Reply with quote  Mark this post and the followings unread

i´ve made a stripboard layout for a ISD1820 based modular sampler i found on the bastl instruments website.
built mine today works fine easy project and a lot of fun.
you can get the isd1820 chip very cheap on amazon.
i added voltage regulator input buffer and out booster.

1st pot is input attenuverter
2nd is pitch cv attenuverter
3rd output booster
for the main pitch i used a 100k fader on the right

feed through and loop are spdt´s

rec trig and gate are momentary buttons.


ModularSampler Stripboard Front.jpg
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modularSamplerHelper.png
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Modular-SamplerV2 (2).png
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Heres the original schematic from Bastl Instruments
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Modular Sampler test.mp3
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Simple drumloop adjusting pitch. later the pitch is lfo modulated

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g.gabba



Joined: Nov 29, 2008
Posts: 445
Location: berlin
Audio files: 23

PostPosted: Wed Sep 12, 2018 2:47 am    Post subject: Reply with quote  Mark this post and the followings unread

nice!
didnt know about this chip.

Would be interesting to know what are the lower REC/PLAY timing limits.
I have something like an odd delay in mind, one is recording - one is playing, with filter-feedbackloop?

cu,
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emiz



Joined: May 16, 2018
Posts: 16
Location: germany
Audio files: 1

PostPosted: Wed Sep 12, 2018 9:39 pm    Post subject: Reply with quote  Mark this post and the followings unread

g.gabba wrote:
nice!
didnt know about this chip.

Would be interesting to know what are the lower REC/PLAY timing limits.
I have something like an odd delay in mind, one is recording - one is playing, with filter-feedbackloop?

cu,


the record time goes up to 20 seconds depending on the resistor or in this case the position of the pitch cv pot during the record. . the sample rate is also affected by this. you get best results in the middle range .


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AlanP



Joined: Mar 11, 2014
Posts: 525
Location: New Zealand
Audio files: 32

PostPosted: Thu Sep 13, 2018 1:19 am    Post subject: Reply with quote  Mark this post and the followings unread

Interesting -- I've built a Madbean Loophole, which is a stompbox looper that uses the ISD1020AP chip in similar fashion. The ISD1020AP is a bit bigger though -- 28 pin!

How is the audio quality?
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emiz



Joined: May 16, 2018
Posts: 16
Location: germany
Audio files: 1

PostPosted: Thu Sep 13, 2018 5:55 am    Post subject: Reply with quote  Mark this post and the followings unread

the quality is very noisy. and theres a audible click when you trigger it, but not too bad at all.
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