The Shop > Electronics & IC Programing
Digital oscilloscope project/kit
PK:
--- Quote from: John Swift on January 22, 2016, 06:32:44 PM ---decided to assemble my DSO138 oscilloscope kit this afternoon
it worked first time even though the solder didn't flow that well on the surface mount components - an excuse to buy a smt work station I think ?
--- End quote ---
Heat and flux are the key, use plenty of both and avoid lead free solder.
--- Quote ---and the trace shows some noise from the power supply
http://forum.banggood.com/forum-topic-61279.html
--- End quote ---
We keep a bag of 1000uF caps. Mostly for investigating these sorts of problems. But sometimes, on a one off job, they just get left in place.
RobWilson:
--- Quote from: wheeltapper on January 17, 2016, 04:05:07 PM --- :D :D :D I've spent the afternoon assembling the component tester and it's case and it appears to work perfectly. :ddb: :ddb: :ddb: :ddb:
there weren't any :zap: :zap: either.
trying to figure out the calibration was a bit of a bugger, there are online instructions but they aren't very clear...................or I'm thick :bang:
choose whichever you like.
Roy.
--- End quote ---
Nice one Roy :thumbup: , I added the three fly leads to mine which made calibrating easier :zap:
--- Quote from: John Swift on January 22, 2016, 06:32:44 PM ---decided to assemble my DSO138 oscilloscope kit this afternoon
it worked first time even though the solder didn't flow that well on the surface mount components - an excuse to buy a smt work station I think ?
for now I've used the switches provided but may change them when I mount it in a box
modding is a must !
two things needs investigating
the variable capacitor C6 does not appear to do much
and the trace shows some noise from the power supply
http://forum.banggood.com/forum-topic-61279.html
John
added picture of screen showing the noise on the trace -
not too bad considering its a £15 kit
--- End quote ---
Hi John ,
Some how I just knew you would find putting the DSO kit together to be a walk in the park :thumbup:
do you think the noise problem is fixable ?
Oh yes modding is a must lol , when you find a source of good quality switches could you post a link to them please so I may purchase some replacements :dremel:
Cheers Rob
wheeltapper:
Hi Rob.
this is mine in it's case.
and here are the flyleads I modded on to a 3 pin header that plugs into the front socket.
Roy.
RobWilson:
Hi Roy ,
That looks great :thumbup: ,methinks I should have maybe went for the one with the enclosure .
Cheers Rob
hopefuldave:
--- Quote from: John Rudd on January 16, 2016, 11:17:57 AM ---You managed to chip off all the slag around those welded joints then Rob? :lol:
Gotta admit, that seller does have quite a few good projects... :coffee: but I dont really need any more test gear......
Owon double beam digital scope with lcd display
2 x 30 v 3 A twin channel power supplies
Digital frequency counter
Lcd scope with frequency meter/ waveform generator
3 x UT 50 dvms etc etc.....
Aint got a bench big enough....or room for one :lol:
--- End quote ---
Wot, no Spectrum Analyser? RF signal generator? Counter/Timer? GPIB controller?
What I *could* use at the moment is a decent / cheap LCR meter, I have to take stuff to work for one of the ladies to measure (overkill really, 6-digit precision...)
Dave H. (the other one)
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