# Another ISD1820 sampler (tiny 4 ch veroboard) **URL:** \ **Category:** DIY STUFF\ **Created:** [October 22, 2022, 10:15am UTC](https://lookmumnocomputer.discourse.group/t/another-isd1820-sampler-tiny-4-ch-veroboard/5561 "2022-10-22T10:15:24Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![jacobsteel](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/jacobsteel/32/30089_2.png) [@jacobsteel](https://lookmumnocomputer.discourse.group/u/jacobsteel)\ **Post date:** [October 22, 2022, 10:15am UTC](https://lookmumnocomputer.discourse.group/t/another-isd1820-sampler-tiny-4-ch-veroboard/5561/1 "2022-10-22T10:15:24Z")
Posting another ISD1820 sampler here, as I managed to cram everything into a really tiny box (including a battery), by using pin strips and sandwiching boards. What I learned: Sandwiching boards was perfect as I could make all input / output / control connections and continuity check them separately, then leave them and work on different changes on the sampler board (normally cables tend to break when assembling / disassembling / debugging). Sandwiching also meant I could place boards across the box and worry less about connecting cables getting in the way when closing it. It runs on 9V battery/adapter in via a 3.3 stabilizer. As it runs on 3.3 V I also use a CD4069 CMOS hex inverter as a summing amplifier (as e.g. Lauri does). • Another trick to a tight fit was using finer gauge wiring and mount everything a bit tidier than usual… (ribbon cable wiring from a junked harddrive worked fine). ![sampler insides](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/8/7/87b40ddbf757f14dbd9290c8c4ad0e4ad76ad3b6.jpeg) • Small box (c.f. cat’s head) ![cat and box](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/8/a/8a41a08e91a8d07f2aa99b1990d2e4a7a1c57690.jpeg) • Sandwiching the sampler board: ![sampler board](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/8/3/832cc38427039882150f70e467577bcc2e244d16.jpeg) … and the input/output/control-connections board: ![sandwich receiver](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/e/3/e38c3ef398741142cd788780cbd28db91ebf4ce3.jpeg) Inspiration from [https://www.youtube.com/watch?v=epjCe3o5BPA](https://www.youtube.com/watch?v=epjCe3o5BPA) by Lauri, [https://lookmumnocomputer.discourse.group/t/looper-sampler-isd1820-lo-fi/868](https://lookmumnocomputer.discourse.group/t/looper-sampler-isd1820-lo-fi/868) by Dud (with loads of very good replies posting alternative versions, including discussion of the “clicking”\*). [More build pics (including shorts of excellent drilling help by J. Lindengren)](https://www.instagram.com/p/Cj3TizBjA3k/) The ISD1820 is SUPERB for EXTREME pitching, and a 100K pot will still give you very good tuning control. Here, I pitched church bells down very very low and slowly brought them up (I’ve found no commercially available sampler/looper pedal with quite that range): **Flea Market Cathedral** ((sample “Centre-Val de Loire » Bells cathedral”) courtesy of [Arnaud Coutancier](https://freesound.org/people/arnaud%20coutancier/sounds/376594/) [![](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/7/d/7d3239f82d403acc4c9dbe14e77fa0272f411840.jpeg "Flea Market Cathedral") ](https://www.youtube.com/watch?v=xwdriExR3y8) - as for the clicking, I noticed you could _somewhat_ lower the clicking noise by recording via line in at higher levels. ---
**Author:** ![jacobsteel](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/jacobsteel/32/30089_2.png) [@jacobsteel](https://lookmumnocomputer.discourse.group/u/jacobsteel)\ **Post date:** [October 30, 2022, 12:16pm UTC](https://lookmumnocomputer.discourse.group/t/another-isd1820-sampler-tiny-4-ch-veroboard/5561/2 "2022-10-30T12:16:35Z")
UPDATE after a week of use or so… 1. Changed the power from 3.3 V to 5.0 V, so far this works better. Possibly a tiny bit less noise too 2. Added an input transformer (some external stuff added hum, but an inexpensive audio isolating transformer amended this). However, I also had to add a second completely isolated input-jack (stereo to mono for stereo stuff). And drilling an extra hole with all components in place… suffice to say I had to chase a minor repair for a while. 3. It’s tiny. The sandwiching works well but I need a magnifying glass to work on it… Still, worth all the trouble to have direct access to pitch. And that battery is still good. 🙂 [![](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/f/4/f4953a9205f5abb404a4fdb81403b33f6b19a0eb.jpeg "Hollowed Eve") ](https://www.youtube.com/watch?v=AaHSmeJaW08)