DIY: 4ms RCD

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e-grad
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DIY: 4ms RCD

Post by e-grad » Sun May 22, 2011 11:38 am

I've built a RCD. The pcb and pic were ordered by 4ms any other part I've shopped myself.

I just populated the board minus the LEDs, the jacks which are not panel-mounted, and without any jumper.

However I expected the board to run. It does not. Are any of the parts ommitted necessary to get the board working?

BTW Off course I'm going to build a fully featured RCD. I was just curious to give it a try right now. :deadbanana:

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Post by thermionicjunky » Sun May 22, 2011 12:06 pm

I think the jumpers are necessary.

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Post by rico loverde » Sun May 22, 2011 12:52 pm

looks like your prob. ok without the led's but I think the jumpers are necessary. See step 8 in the build doc below...

http://www.4mspedals.com/clocker/kit/sc ... _guide.pdf
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Post by Low-Gain » Sun May 22, 2011 2:33 pm

the Jumpers are 100% needed if you aren't using the expander.

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Post by e-grad » Mon May 23, 2011 9:45 am

I'm not sure:
Step 9: Jumpers: Home Free!
Insert the jumpers as shown. The jumpers are necessary for the SCM to function without a breakout,
but for the RCD you may put jumpers on and off as you wish. The suggested default setting is shown.
RCD jumpers
From the build guide linked above.

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Post by sduck » Mon May 23, 2011 10:18 am

Stick some jumpers in and see!
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Post by e-grad » Mon May 23, 2011 10:39 am

sduck wrote:Stick some jumpers in and see!
I've got none ATM.

I'd like to avoid temporary bridges since I usually leave scorched earth when desoldering. However, if I find some spare switches lying around I'll use them.

(I definately want to avoid the LEDs before the panel is done.)

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Post by sduck » Mon May 23, 2011 1:03 pm

Paper clips? Leftover clipped resistor leads? Surely you've got something around there that can be used as a temporary piece of conductive metal to use as a jumper. Aluminum foil? Some candy wrappers will work. "Hey Ed, come over here and hold your machete just so so I can see if this RCD fires up".
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Post by 4mspedals » Mon May 23, 2011 1:42 pm

Unlike the SCM, the RCD will work without jumpers, but it will be in Max-Divide-By-64 mode, so you'll have to wait for more than 32 input clock pulses before you see any action. Give it a fast clock around 20Hz if you want to know instantly. The jumper charts are in the manual page 2.

Without jacks or LEDs, I'm assuming you're using a meter or scope to determine if it's outputting pulses?

A true must-have for any workbench is a solder sucker and some solder wick. It's like an Undo button!

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Post by sensensempompom » Mon May 23, 2011 2:22 pm

i still want the rcd scm.. as a stand alone option, self contained box
many people can't afford to expand as far with their systems and
i'm sure even in a limited run it would be a hit, clasic , winner..
sorry if this is the wrong spot to post

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Post by sduck » Mon May 23, 2011 10:04 pm

The kits for these are available - get them and a box and go for it.

BTW this thread inspired me to fire off an order for pcb and chip versions of the rcd, scm and scm breakout pcb.
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Post by 4mspedals » Mon May 23, 2011 10:24 pm

i still want the rcd scm.. as a stand alone option, self contained box
Image

Made this thing a while back. You can fit an SCM plus breakout into a hammond 1590C box with some creative jack wiring. Plus a tap clock button! You could fit RCD+breakout+SCM+breakout into the 1590D (7"x4"x2").. been meaning to do this one!

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Post by e-grad » Tue May 24, 2011 4:23 am

4mspedals wrote:Without jacks or LEDs, I'm assuming you're using a meter or scope to determine if it's outputting pulses?
I've connected an output to an EG of mine which was constantly high (EG's LED has been on).
4mspedals wrote:A true must-have for any workbench is a solder sucker and some solder wick. It's like an Undo button!
I've got both. However my solder sucker functions as solder pad sucker as well. Whether I lift a pad depends very much on the pcb and I might not face the prob. with any 4ms board though.

I don't know whether it's me or my method yet solder wick never worked for me.
sduck wrote:Surely you've got something around there that can be used as a temporary piece of conductive metal to use as a jumper.
I've not fitted the header, either. I'm going to solder the switches directly into there place.

I just loved to fire up the board to do a basic test and solder any missing part neatly after the panel is done. I know this is not the perfect way but it works best for me.
Last edited by e-grad on Thu May 26, 2011 11:05 am, edited 1 time in total.

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Post by rosch » Tue May 24, 2011 6:42 am

what an amazing module! that's now added to my list. thanks for this tip!

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Post by zeroseven » Thu May 26, 2011 5:59 am

I ordered 1 of these kits a few ago but I haven't heard anything from 4MS yet. I'm not worried, it's only been 3 days.

just wondering if you received notification that your order had shipped?

:hmm:
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Post by e-grad » Thu May 26, 2011 11:10 am

zeroseven wrote:just wondering if you received notification that your order had shipped?
I've placed two orders with Dann and received at least once a notification on shipping. Can't remember for the 2nd order.

To my little experience with him he ships swiftly yet the German customs is delaying his stuff.

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Post by zeroseven » Thu May 26, 2011 12:12 pm

Thanks elektrograd!!

Irish customs don't understand gear lust either :bang:
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Post by sensensempompom » Thu May 26, 2011 4:16 pm

4mspedals
You could fit RCD+breakout+SCM+breakout into the 1590D (7"x4"x2").. been meaning to do this one!

I'd buy it!

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Post by 4mspedals » Thu May 26, 2011 6:38 pm

zeroseven wrote:I ordered 1 of these kits a few ago but I haven't heard anything from 4MS yet. I'm not worried, it's only been 3 days.
Yep, usually we ship kits in 1-2 days, but we took wednesday off for our pedal guy's birthday party. Your kits went out today, you should have gotten an email with the tracking number, email me if you didn't get it.

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Post by diablojoy » Fri May 27, 2011 4:33 am

You could fit RCD+breakout+SCM+breakout
doing 2 mixed modules of these as above though in a different size format
cant wait to fire one up will be orsm

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Post by zeroseven » Fri May 27, 2011 9:09 am

4mspedals wrote:
zeroseven wrote:I ordered 1 of these kits a few ago but I haven't heard anything from 4MS yet. I'm not worried, it's only been 3 days.
Yep, usually we ship kits in 1-2 days, but we took wednesday off for our pedal guy's birthday party. Your kits went out today, you should have gotten an email with the tracking number, email me if you didn't get it.
Thanks Dann,

I got the tracking number etc. All good :bacon:

I better go look behind the couch for some patience.
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Post by dude » Mon May 30, 2011 12:18 am

does anyone know offhand or can measure the division output voltages? i am hoping it is spitting5v gates. i have a plan for an evil 5u scm/rcd freak panel. they both run on 15 volts right?

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Post by sduck » Mon May 30, 2011 9:56 am

dude wrote: i have a plan for an evil 5u scm/rcd freak panel. they both run on 15 volts right?
Me too! And yes, according to 4ms it'll all run on 15v also. I'm thinking it'll all fit behind a 2U motm size panel, although there may be some squeezing to make it fit.
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Post by dude » Mon May 30, 2011 11:48 am

any word on gate/trig out voltage?

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Post by urbanscallywag » Mon May 30, 2011 12:42 pm

dude wrote:any word on gate/trig out voltage?
they are hot, approaching +12V
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