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Projects => Tech Help - Projects Page => Topic started by: sirbergersworth on October 08, 2013, 02:17:02 AM

Title: Anyone know what these are?
Post by: sirbergersworth on October 08, 2013, 02:17:02 AM
I was on JD's website the other day and noticed he had a new layout and kit for the D-Verb.
I have been wanting to build one of these for a while and so I ordered the kit. I usually just buy pcb's and source my own components but I just felt like building this soon and this would be the fastest way. Anuff back story. These little guys were in the kit and I cannot identify them.
Any idea? They both measure about 0.01 ohms. (http://img.tapatalk.com/d/13/10/08/7eqeze6y.jpg)


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Title: Re: Anyone know what these are?
Post by: icecycle66 on October 08, 2013, 02:19:12 AM
They're just fancy jumpers.
Title: Re: Anyone know what these are?
Post by: sirbergersworth on October 08, 2013, 03:18:56 AM

Quote from: icecycle66 on October 08, 2013, 02:19:12 AM
They're just fancy jumpers.

That's just silly.
Now I feel very green. lol



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Title: Re: Anyone know what these are?
Post by: juansolo on October 08, 2013, 07:38:03 AM
Yup zero ohm 'resistors'. Or, as he says, jumpers ;)
Title: Re: Anyone know what these are?
Post by: jkokura on October 08, 2013, 03:48:49 PM
That's why you get the 0.01 ohm reading... it's not actually resisting more than actual copper would resist. If you measure a length of resistor lead you'd probably get the same reading.

Jacob
Title: Re: Anyone know what these are?
Post by: sirbergersworth on October 08, 2013, 04:21:35 PM

Quote from: jkokura on October 08, 2013, 03:48:49 PM
That's why you get the 0.01 ohm reading... it's not actually resisting more than actual copper would resist. If you measure a length of resistor lead you'd probably get the same reading.

Jacob

Funny thing is that there are traces connecting the thru holes where the jumper would go. Strange. I don't think I am gonna put them in, or should I? JD doesn't have jumpers on the pic of his build in the documents.

Btw, I got it all components minus the brick installed last night. I am painting the enclosure now.
Sometimes I feel lame buying kits but I have no problem supporting JD sometimes by putting some money in his pocket!

I hope I have no issues cause once I solder in the brick, almost all solder will be covered. I have done a check with magnifying glass and a jewelers screwdriver to make sure all the close pads are free.


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Title: Re: Anyone know what these are?
Post by: jkokura on October 08, 2013, 04:39:40 PM
Sorry, am I just having a brain fart and wondering who you mean when you say 'JD' and what website/project are you talking about? Should I know this, or do I and I'm just not thinking?

Jacob
Title: Re: Anyone know what these are?
Post by: crashguitar on October 08, 2013, 05:14:02 PM
I think he is referring to JD Sleep at General Guitar Gadgets.
Title: Re: Anyone know what these are?
Post by: sirbergersworth on October 08, 2013, 06:00:48 PM

Quote from: jkokura on October 08, 2013, 04:39:40 PM
Sorry, am I just having a brain fart and wondering who you mean when you say 'JD' and what website/project are you talking about? Should I know this, or do I and I'm just not thinking?

Jacob

JD Sleep @ General Guitar Gadgets.
The pedal is his DVerb. Same as a Hermida Reverb.
New layout.


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Title: Re: Anyone know what these are?
Post by: RobA on October 08, 2013, 06:22:24 PM
Quote from: sirbergersworth on October 08, 2013, 04:21:35 PM
[...]
Funny thing is that there are traces connecting the thru holes where the jumper would go. Strange. I don't think I am gonna put them in, or should I? JD doesn't have jumpers on the pic of his build in the documents.
...
In the parts layout doc, it shows three jumpers that look like they need to be connected to me.
http://www.generalguitargadgets.com/pdf/ggg_verb_lo.pdf?phpMyAdmin=78482479fd7e7fc3768044a841b3e85a (http://www.generalguitargadgets.com/pdf/ggg_verb_lo.pdf?phpMyAdmin=78482479fd7e7fc3768044a841b3e85a)
Are these the jumpers you are considering leaving off?
Title: Re: Anyone know what these are?
Post by: sirbergersworth on October 08, 2013, 06:54:48 PM

Quote from: RobA on October 08, 2013, 06:22:24 PM
Quote from: sirbergersworth on October 08, 2013, 04:21:35 PM
[...]
Funny thing is that there are traces connecting the thru holes where the jumper would go. Strange. I don't think I am gonna put them in, or should I? JD doesn't have jumpers on the pic of his build in the documents.
...
In the parts layout doc, it shows three jumpers that look like they need to be connected to me.
http://www.generalguitargadgets.com/pdf/ggg_verb_lo.pdf?phpMyAdmin=78482479fd7e7fc3768044a841b3e85a (http://www.generalguitargadgets.com/pdf/ggg_verb_lo.pdf?phpMyAdmin=78482479fd7e7fc3768044a841b3e85a)
Are these the jumpers you are considering leaving off?

Yes.
On the board you can see a trace between the thru holes.
And, he only sent me two jumpers. (http://img.tapatalk.com/d/13/10/09/rana3adu.jpg)
And his pic from his build instructions doesn't have jumpers. (http://img.tapatalk.com/d/13/10/09/ruqazu5e.jpg)

I am gonna put jumpers in to be safe. I am just going to jumper them with a cut off lead. I am not using the 0 ohm resistor.


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Title: Re: Anyone know what these are?
Post by: DutchMF on October 08, 2013, 06:59:46 PM
Did you consider measuring conductance between these pads with a DMM? Might save you some soldering/board clutter/frustration.... Or drop JD an email, and see what his response is.

Paul
Title: Re: Anyone know what these are?
Post by: RobA on October 08, 2013, 07:16:56 PM
Quote from: DutchMF on October 08, 2013, 06:59:46 PM
Did you consider measuring conductance between these pads with a DMM? Might save you some soldering/board clutter/frustration.... Or drop JD an email, and see what his response is.

Paul
I'd agree. If your DMM has a continuity setting, just test it. It looks like the board may have been moved to being double sided by putting in the jumpers as traces. It probably wouldn't hurt to have the extra paths, but it looks like a couple of those connect ground sections.
Title: Re: Anyone know what these are?
Post by: sirbergersworth on October 08, 2013, 07:27:06 PM
I did measure across them and there is continuity.
I did also send JD an email. Haven't heard back yet. 


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Title: Re: Anyone know what these are?
Post by: jkokura on October 08, 2013, 08:23:57 PM
Yeah, I would guess you need no jumpers there. It looks like the layout was originally designed for single sided use, and it's been transformed into a double sided and those pads are now connected on the top layer.

Jacob
Title: Anyone know what these are?
Post by: sirbergersworth on October 08, 2013, 11:59:42 PM
Here is the reply from JD.

Hi,

I'm sorry, those jumpers in the kit are a carry-over from the previous version we used to sell.  You don't need them.  Your keen sense of observation is correct.  The jumpers are built into the new PCBs.

Sorry about the confusion. Ignore the zero ohm resistors.  We have corrected this and the kits won't have those in the future :-)

Thanks,
JD



At least now I know what a 0 ohm resistor is. 

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Title: Re: Anyone know what these are?
Post by: gtr2 on October 09, 2013, 12:36:13 AM
"Jumpers are built into the new PCB's"  ;D
Title: Re: Anyone know what these are?
Post by: gordo on October 09, 2013, 01:19:37 AM
Seriously???  Someone figured out a way to make money on jumpers???  I'd use them just for the cool mojo.  Of course they'd have to be carbon comp jumpers...
Title: Re: Anyone know what these are?
Post by: sirbergersworth on October 09, 2013, 05:02:19 AM
At first I thought they might be a diode cause it had one stripe. But that stripe is pretty much in the middle. lol


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Title: Re: Anyone know what these are?
Post by: RobA on October 09, 2013, 05:15:37 AM
Quote from: sirbergersworth on October 09, 2013, 05:02:19 AM
At first I thought they might be a diode cause it had one stripe. But that stripe is pretty much in the middle. lol
Bidirectional diode?

I saw one of the these fancy jumpers for the first time a couple of weeks ago in a build here and had to ask what it was. My first thought was that it was an inductor.
Title: Re: Anyone know what these are?
Post by: alanp on October 09, 2013, 05:53:22 AM
Well, they look nicer on a board than wire jumpers do, plus you can solder them in just like a resistor (as opposed to vaguely measuring out wire, soldering, cutting, swearing when it's too short, start again...)

They don't work in really short jumps, though.