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Analog Discovery 3 or budget bench setup
Overspeed:
Hello
PSU is not really a problem a flea market old PC PSU and a 5 $ banana PCB from AliExpress supply 5 and 12V
generate 3.3 or other voltage can be done with cheap LDO
Entry level Owon , Hantek and other chinese oscilloscope can be located under 200 $
Regards
OS
Fungus:
--- Quote from: tautech on June 20, 2024, 08:15:13 am ---Strongly disagree.
SDS802X HD is $ 339 and topic includes the words: or budget bench setup
--- End quote ---
--- Quote from: tautech on June 20, 2024, 08:40:15 am ---Sure, hobble the OP with equipment that will only ever get him so far.......
--- End quote ---
You mean like owning a 2-channel SDS802X?
Overspeed:
--- Quote from: jasonRF on June 20, 2024, 12:37:15 pm ---Before purchasing anything, I would check into whether the school you are at allows you to go in and use the electronics labs on your own time. When/where I studied EE we were not, but it is worth checking. Assuming they don't...
Unless you need higher voltages or frequencies than it can handle, if you were my kid I would recommend the Analog Discovery. There are a number of good reasons, most/all of which have been covered by others:
It is small so can easily be thrown in a bag and taken anywhere, and college students tend to live in tight quarters and move a couple of times a year. For me this would be a big deal.
It also includes Bode plots and other capabilities that would likely take a fair amount of work to implement with most stand-alone equipment that you could afford right now.
If you eventually do buy a bench setup the AD3 could still be useful.
If you ever find that you no longer use it then you can sell it; they hold their value quite well.
The first handful of years I was doing hobby electronics (which I started many years after finishing school) I only had a Picoscope 2204a which is inferior to an AD. With an EE background I had the knowledge to make good use of the limited capabilities and it was perfectly fine.
jason
--- End quote ---
Hello
Small is not really a advantage for an oscilloscope as the size / quality of the display is also an important parameter , better to see something on the screen .
Small do not include the probes and accessories ( banana to BNC , PSU ... )
Small don t mean STRONG so you need carry case
another important parameter is the robustness of the BNC connector as cheap entry level oscilloscope have problem of connectors / pcb stiffness
Regards
OS
Fungus:
--- Quote from: Overspeed on June 20, 2024, 01:01:09 pm ---PSU is not really a problem a flea market old PC PSU and a 5 $ banana PCB from AliExpress supply 5 and 12V
--- End quote ---
I hadn't seen those banana PCBs before, they're cool and they even have fuses!
example: https://www.aliexpress.com/item/1005004967107585.html
There's lots of variants, too, eg.: https://www.aliexpress.com/item/1005006215767600.html
Old ATX power supplies are easy to get hold of.
--- Quote from: Overspeed on June 20, 2024, 01:01:09 pm ---generate 3.3 or other voltage can be done with cheap LDO
--- End quote ---
ATX PSUs have 3.3V and -12V rails (actually brought out on that adapter).
There's plenty of cheap adjustable boost/buck converters for other voltages.
Edit:
This one has a built in adjustable buck converter, USB connectors and supports quick charging for phones...
https://www.aliexpress.com/item/1005006000769093.html
I'm tempted by that one.
Antonio90:
--- Quote from: Overspeed on June 20, 2024, 02:58:26 pm ---
Hello
Small is not really a advantage for an oscilloscope as the size / quality of the display is also an important parameter , better to see something on the screen .
Small do not include the probes and accessories ( banana to BNC , PSU ... )
Small don t mean STRONG so you need carry case
another important parameter is the robustness of the BNC connector as cheap entry level oscilloscope have problem of connectors / pcb stiffness
Regards
OS
--- End quote ---
Hello, It is an advantage in terms of portability, which might or might not be relevant.
For a bench scope, the sweet spot is certainly larger than entry-level devices, but WRT to PC oscilloscopes smaller is better (assuming enough structural integrity), as most of the processing grunt and screen size depend on the computer.
As per ATX supplies, I'm not quite sure. If you can design overcurrent protection properly, maybe, but 30-50 amps in the event of a short are a fire hazard at worst, and will certainly burn your breadboards and components.
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