Curse you David Jones! - Page 1
Forum section: electronics / beginners

author: vpelleri
author_rank: Newbie
timestamp: April 07, 2011, 01:54:24 pm
content: 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!

author: deephaven
author_rank: Frequent Contributor
timestamp: April 07, 2011, 02:07:36 pm
content: 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

author: apex
author_rank: Regular Contributor
timestamp: April 07, 2011, 02:08:58 pm
content: 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

author: ShiftPlusOne
author_rank: Regular Contributor
timestamp: April 07, 2011, 02:39:17 pm
content: 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.

author: Mechatrommer
author_rank: Super Contributor
timestamp: April 07, 2011, 02:40:35 pm
content: Quote from: vpelleri on April 07, 2011, 01:54:24 pmand a perfectly non-operative brain.

author: orbiter
author_rank: Frequent Contributor
timestamp: April 07, 2011, 04:40:41 pm
content: Don't worry vpelleri, it's just their way of being friendly towards youPerhaps 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

author: Fraser
author_rank: Super Contributor
timestamp: April 07, 2011, 08:43:23 pm
content: I'm happy to helpThe 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 positionsWhen 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

author: vpelleri
author_rank: Newbie
timestamp: April 07, 2011, 08:49:59 pm
content: 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!

author: Russel
author_rank: Regular Contributor
timestamp: April 07, 2011, 08:58:53 pm
content: 8K2 = 8.2K

author: LewisS
author_rank: Newbie
timestamp: April 07, 2011, 09:00:06 pm
content: 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.

author: neoone
author_rank: Regular Contributor
timestamp: April 07, 2011, 09:10:03 pm
content: Quote from: deephaven on April 07, 2011, 02:07:36 pmExactly the same with my girlfriendAny way, does it work after changing the resistor ?

author: vpelleri
author_rank: Newbie
timestamp: April 07, 2011, 09:15:27 pm
content: Yup, it's working!

author: Fraser
author_rank: Super Contributor
timestamp: April 07, 2011, 09:42:36 pm
content: Great news, pleased to hear itYou are amongst friends here and most are very helpfull.

author: FreeThinker
author_rank: Frequent Contributor
timestamp: April 07, 2011, 09:55:24 pm
content: Quote from: Aurora on April 07, 2011, 09:42:36 pmWould you like to expand on MOST? Lol. Welcome to the forum and to quote jeri 'Failure is good'

author: Mechatrommer
author_rank: Super Contributor
timestamp: April 07, 2011, 11:28:04 pm
content: Quote from: vpelleri on April 07, 2011, 09:15:27 pmthe brain right? welcome

author: EEVblog
author_rank: Unknown
timestamp: April 08, 2011, 02:45:08 am
content: Quote from: vpelleri on April 07, 2011, 01:54:24 pmYou're welcomeDave.

author: Russel
author_rank: Regular Contributor
timestamp: April 11, 2011, 06:44:00 am
content: Ah, the curse of Davy Jones locker!