Author Topic: Curse you David Jones!  (Read 7256 times)

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Offline vpelleri

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Curse you David Jones!
« on: April 07, 2011, 01:54:24 pm »
 I recently ordered a Rigol scope, and having spent most of my money, I thought I'd save a little and build a function generator from a kit. I've heard and read Dave say on more than one occasion that if you build a kit, he hopes it doesn't work. Well, congratulations Dave, and thank you! I have a perfectly non-operative function generator sitting on my bench.
 
 I only wish I had a huge spider to go with it!

 ;D
 

Offline deephaven

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Re: Curse you David Jones!
« Reply #1 on: April 07, 2011, 02:07:36 pm »
Well, with the Rigol, you have the perfect instrument to debug your function generator. Plus, on here, you have a team of people all round the world waiting to help you out. I'm not sure about Dave's spider, but my wife would totally freak out on one a tenth of that size - and it would be my fault  :D
 

Offline apex

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Re: Curse you David Jones!
« Reply #2 on: April 07, 2011, 02:08:58 pm »
If you don't know WHAT is broken, than I ask myself why the hell you bought an Rigol Scope...

If you could say us, what does not work, you could have a slight shine of hope in this forum, that someone might have an solution for you.

Whining alone DOES NOT help!

apex
 

Offline ShiftPlusOne

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Re: Curse you David Jones!
« Reply #3 on: April 07, 2011, 02:39:17 pm »
Lol, I don't think the point was to complain or to ask others to fix it, but to share the experience of something going wrong.
 

Online Mechatrommer

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Re: Curse you David Jones!
« Reply #4 on: April 07, 2011, 02:40:35 pm »
I have a perfectly non-operative function generator sitting on my bench.
and a perfectly non-operative brain. ;)
Nature: Evolution and the Illusion of Randomness (Stephen L. Talbott): Its now indisputable that... organisms “expertise” contextualizes its genome, and its nonsense to say that these powers are under the control of the genome being contextualized - Barbara McClintock
 

Offline orbiter

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Re: Curse you David Jones!
« Reply #5 on: April 07, 2011, 04:40:41 pm »
Don't worry vpelleri, it's just their way of being friendly towards you :)

Perhaps you could explain a lil' better as to what's going on with the FG? As mentioned previously there are certainly some friendly & knowledgeable guys around here who will likely be happy to offer some opinions.

Oh and welcome to the EEVBlog ;)
 

Online Fraser

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Re: Curse you David Jones!
« Reply #6 on: April 07, 2011, 08:43:23 pm »
I'm happy to help  :)

The first piece of valuable information would be ... is it scratch built on 'veroboard' or a kit built on a PCB. That latter is often easier to fault find on and the Veroboard has the added complication of correct strip cuts and link positions  ;)

When fault finding on a relatively simple design I would always start by checking all solder joints (I have even been known to miss soldering the odd one) and looking for solder bridges. I would then check that I had the correct components in the correct locations, taking note of capacitor polarities and semiconductor pinouts. I have seem some hobbyists caught out by kit suppliers or electronics shops supplying a different pinout transistor as a near equivalent. From memory I think the BC182 and BC182B have a different pinout, but I may be wrong as the memory is fading.

Describe your project, show us the schematic and a picture of your PCB and we will try to help. If that is your wish, that is  :D
 

Offline vpelleri

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Re: Curse you David Jones!
« Reply #7 on: April 07, 2011, 08:49:59 pm »
 Thanks everyone for your responses. I've figured out the problem, there are two resistors, one is an 82K resistor and the other is an 8K2 resistor. I have no idea what an 8K2 resistor is, so I thought it was a missprint on the plans, It's KIT-23 from Kitsrus dot com.
 My original posting was to chide Dave for his newbie curse and hopefully make some friends while doing so.
 Thanks again for your kind attention!
 

Offline Russel

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Re: Curse you David Jones!
« Reply #8 on: April 07, 2011, 08:58:53 pm »
8K2 = 8.2K
 

Offline LewisS

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Re: Curse you David Jones!
« Reply #9 on: April 07, 2011, 09:00:06 pm »
8k2 is a shorter method of writing 8.2k ohm resistor. It is used a lot because it is shorter and it can be more accurate since sometimes it can be hard to see a . (dot or period) on very small components or solder mask labels.
 

Offline neoone

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Re: Curse you David Jones!
« Reply #10 on: April 07, 2011, 09:10:03 pm »
I'm not sure about Dave's spider, but my wife would totally freak out on one a tenth of that size - and it would be my fault  :D
Exactly the same with my girlfriend ;D

Any way, does it work after changing the resistor ?
 

Offline vpelleri

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Re: Curse you David Jones!
« Reply #11 on: April 07, 2011, 09:15:27 pm »
Yup, it's working!
 

Online Fraser

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Re: Curse you David Jones!
« Reply #12 on: April 07, 2011, 09:42:36 pm »
Great news, pleased to hear it  :)

You are amongst friends here and most are very helpfull.
 

Offline FreeThinker

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Re: Curse you David Jones!
« Reply #13 on: April 07, 2011, 09:55:24 pm »
Great news, pleased to hear it  :)

You are amongst friends here and most are very helpfull.
Would you like to expand on MOST? Lol. Welcome to the forum and to quote jeri 'Failure is good'
Machines were mice and Men were lions once upon a time, but now that it's the opposite it's twice upon a time.
MOONDOG
 

Online Mechatrommer

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Re: Curse you David Jones!
« Reply #14 on: April 07, 2011, 11:28:04 pm »
Yup, it's working!
the brain right? welcome ;)
Nature: Evolution and the Illusion of Randomness (Stephen L. Talbott): Its now indisputable that... organisms “expertise” contextualizes its genome, and its nonsense to say that these powers are under the control of the genome being contextualized - Barbara McClintock
 

Offline EEVblog

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Re: Curse you David Jones!
« Reply #15 on: April 08, 2011, 02:45:08 am »
I recently ordered a Rigol scope, and having spent most of my money, I thought I'd save a little and build a function generator from a kit. I've heard and read Dave say on more than one occasion that if you build a kit, he hopes it doesn't work. Well, congratulations Dave, and thank you! I have a perfectly non-operative function generator sitting on my bench.

You're welcome  :P

Dave.
 

Offline Russel

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Re: Curse you David Jones!
« Reply #16 on: April 11, 2011, 06:44:00 am »
Ah, the curse of Davy Jones locker!

 


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