DIY 4ms SMR

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dalhasumai
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DIY 4ms SMR

Post by dalhasumai » Fri Mar 18, 2016 5:49 am

A guy started a facebook group for PCB group buys and he's sellling 4ms SMR PCBs.
I started sourcing all the parts for a mouser/thonk basket.

GitHub : https://github.com/4ms/SMR
BOM :
I'm not sure about every replacement parts :

- SLIDES (POT-LED) : i see two alternatives but in 50K :
Thonk (red LED...) https://www.thonk.co.uk/shop/music-thin ... -voltages/
Mouser (not sure about colours) http://www.mouser.fr/ProductDetail/Alph ... boZoxqo%3d
Anyone know about a 100k source ?

- the 5 pots (POTR0904N) seems to be thonk's trimmers https://www.thonk.co.uk/shop/ttpots/

- VR4 (VREG-DCDC) seems to be this one http://www.mouser.fr/ProductDetail/RECO ... w5CejVE%3d if anyone a cheaper alternative, let it be !

- D13,D19 http://www.mouser.fr/ProductDetail/Vish ... bn2Q%3d%3d same thing here

- S0, S1 : BUTTON-TACT : http://www.mouser.fr/ProductDetail/ALPS ... oBay0Ts%3d
this one seems ok (i checked the dimensions)

- V-SEL : http://www.mouser.fr/ProductDetail/TE-C ... GdYnar0%3d

- SWD http://www.mouser.fr/ProductDetail/TE-C ... mg10Mhc%3d

- POWER (SMD !) unshrouded : http://www.mouser.fr/ProductDetail/FCI/ ... vH7rLdI%3d
shrouded http://www.mouser.fr/ProductDetail/Mole ... 252bzYw%3d

- V1 http://www.mouser.fr/ProductDetail/Fair ... NT5Q0mM%3d

- LED-INCLIP : Dual T1 LED, Common Cathode. I'm stuck on this one, seems to come from Malekko's Eagle library. I can't see what it does on the module... Help !

- 27 jacks : Thonkiconn (thonk soon out of stock !) https://www.thonk.co.uk/shop/3-5mm-jacks/
alternative ? http://modularaddict.com/pj301m12-jacks
or see group buy on pusherman group

- Rotary encoder / button, 12mm. I'm also stuck here. same as braids ?

- MINIUSB : http://www.mouser.fr/ProductDetail/Hiro ... EVPIFWo%3d looks ok

- LOCK switches : looks same as Clouds but not permanent (locked) I have 0 knowledges about DPDT, SPDT style so i won't know if it fits.

- submini SPDTT switches : same here...

Your turn now ! :)Image
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insula
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Post by insula » Fri Mar 18, 2016 5:52 am

really big thanks for sharing all this information!!

:yay: :yay: :yay:

i was also thinking to buld one 4ms, and now looks more easy with all this deatils

:banana:

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dalhasumai
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Post by dalhasumai » Fri Mar 18, 2016 5:55 am

Let's do this !

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Post by ki0 » Fri Mar 18, 2016 6:25 am

Could you pass me the facebook group, please?¿ i would like to order some pcbs... :bananaguitar:

Thank you very much for the info.

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dalhasumai
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Post by dalhasumai » Fri Mar 18, 2016 6:36 am

I was told not to share the group link
Please take a moment to check my replacement parts propositions and help me figure out the other ones !
Last edited by dalhasumai on Thu Mar 24, 2016 9:18 am, edited 1 time in total.

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Altitude909
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Post by Altitude909 » Fri Mar 18, 2016 11:00 am

dont forget lightpipes

also: http://www.ebay.com/itm/251176235368

and for the toggle switches, watch the diameter of the legs, the official parts used have tiny leads and finding switches that fit proved a chore. I went with C&K T series but those were really expensive.

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d.simon
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Post by d.simon » Fri Mar 18, 2016 3:43 pm

this work?
http://www.elecrow.com/3mm-led-dual-col ... p-377.html

probably not...through hole.

The dual LED is a clipping led for the input. (if the input signal clips)

RE: lock switches. There was a MW thread on this just recently (LP4 switches). Also my "prototype SMR" thread someone asked about it.


Lock switches are momentary : .brd shows "WHITE-MOM"
MOM = momentary (not mother)

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d.simon
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Post by d.simon » Fri Mar 18, 2016 3:48 pm

the LP4 "e-switch" comes up a few times on MW. There are maybe 3 sources of those types of switches (well buying, eswitch, and ?)

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d.simon
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Post by d.simon » Fri Mar 18, 2016 4:00 pm

yes song huei "tall trimmers"

the real crux IIRC is the 100k illuminated sliders. 20mm travel ... right?

On my prototype version I use 100k rotary pots instead (and a separate LED)

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Post by sempervirent » Fri Mar 18, 2016 5:35 pm

I'll have SMR panels in a few weeks, preorders are open until April 1:
http://grayscale.info/panels/4ms-smr/

Also, one small contribution to the parts list... Thonk has the Davies 1900h-style knobs without a pointer line, like the Rotate knob on the factory builds:
https://www.thonk.co.uk/shop/knobs-davi ... one-metal/

Image

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Altitude909
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Post by Altitude909 » Fri Mar 18, 2016 5:41 pm

d.simon wrote:yes song huei "tall trimmers"

the real crux IIRC is the 100k illuminated sliders. 20mm travel ... right?

On my prototype version I use 100k rotary pots instead (and a separate LED)
Dont have to be 100K, I used 50K and those worked fine

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dalhasumai
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Post by dalhasumai » Fri Mar 18, 2016 6:09 pm

Altitude909 wrote: Dont have to be 100K, I used 50K and those worked fine
Really ? cause mouser is selling the 50k version

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Post by Altitude909 » Fri Mar 18, 2016 6:17 pm

dalhasumai wrote:
Altitude909 wrote: Dont have to be 100K, I used 50K and those worked fine
Really ? cause mouser is selling the 50k version
Yes. They are not being used as analog anything, just as digital controls. Anything 100k-10k should be ok

Image

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d.simon
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Post by d.simon » Sat Mar 19, 2016 12:56 am

sweet.

did u know you can use two SMR to do vocoding?

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dalhasumai
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Post by dalhasumai » Sat Mar 19, 2016 2:42 pm


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Altitude909
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Post by Altitude909 » Sat Mar 19, 2016 3:00 pm

I didnt even use that brand. I used the Eswitch ones:

http://www.digikey.com/product-search/e ... P4OA1PBCTG

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Post by sempervirent » Sat Mar 19, 2016 9:17 pm

E-Switch LP4, Well Buying PS004, and Highly PB61303 are all the same switch as far as I can tell. Which one is the original and which two are the clones? Who knows...

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dalhasumai
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Post by dalhasumai » Wed Mar 23, 2016 2:48 pm

Lightpipes : http://www.mouser.fr/ProductDetail/Dial ... Waun5uo%3d
not sure about the dimensions

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Post by Altitude909 » Wed Mar 23, 2016 3:10 pm

Last edited by Altitude909 on Thu Apr 21, 2016 6:44 am, edited 1 time in total.

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cane creek
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Post by cane creek » Wed Mar 23, 2016 3:44 pm

This might give you an idea of whats involved.

Image

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Conjure
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Post by Conjure » Wed Mar 23, 2016 4:00 pm

Good luck. I've hand-built every Mutable project and I still don't want to touch the SMR. Not scared of the ARM or anything. Just the sheer size of the project. The tiny ICs are a little daunting.

Also, I've heard the LEDs aren't long enough on the DIY versions.

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Post by cane creek » Wed Mar 23, 2016 4:22 pm

So how do you order ? do you send the guy a message ? as the Facebook page looks a bit chaotic.

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dalhasumai
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Post by dalhasumai » Wed Mar 23, 2016 4:27 pm

The guy posts google docs when he's annoucing a new group buy and you fill it with what you need. but try sending him a message, he often have some spare boards.

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Post by d.simon » Wed Mar 23, 2016 4:31 pm

so the lightpipes are friction fit? no glue i assume.
cane creek wrote:This might give you an idea of whats involved.
its a helpful image but doesn't show lightpipes, as stated

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Post by d.simon » Wed Mar 23, 2016 4:35 pm

Conjure wrote:Good luck. I've hand-built every Mutable project and I still don't want to touch the SMR. Not scared of the ARM or anything. Just the sheer size of the project. The tiny ICs are a little daunting.
yeah...its amazing how much logic the led ring takes. digital design though.

just due to the amount of I/O there's a few opamps here and there.
the codec and the arm.
several power regulation sections.

that's about it besides passives.

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