Author Topic: DSO138 oscilloscope  (Read 1536 times)

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Offline nForceTopic starter

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DSO138 oscilloscope
« on: October 16, 2018, 02:50:52 pm »
Where can I get a power supply for this oscilloscope: https://www.ebay.com/itm/Fully-Welded-Assembled-DSO138-2-4-TFT-Digital-Oscilloscope-1Msps-Probe-B1/382222708181?hash=item58fe3fadd5:g:NTEAAOSw881Zs1d1:rk:2:pf:0 ?

Because I don't get it with the package. I know it's not a good oscilloscope but, when I get use to it I will buy more powerful one.

Thanks.
 

Offline IDEngineer

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Re: DSO138 oscilloscope
« Reply #1 on: October 16, 2018, 03:49:01 pm »
From the PCB silkscreening it wants 9VDC. A suitable 9VDC wall wart supply is likely hiding in one of your drawers somewhere!  :)

I am a bit troubled by a PCB that has been "welded"....  :-DD
 
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Offline Gyro

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Re: DSO138 oscilloscope
« Reply #2 on: October 16, 2018, 05:25:20 pm »
If you want true portability, a 9V (6 cell) AA battery holder with Alkaline or preferably NiMh cells works quite well.
Best Regards, Chris
 
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Offline exe

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Re: DSO138 oscilloscope
« Reply #3 on: October 17, 2018, 08:54:44 am »
I think manual says supply voltage should be in the range 9-12V. Above 12V onboard voltage regulator may overhead (so says manual, afaik).

I think mine worked from 8V or something. Below I started to get huge offset errors.
 
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Offline Gyro

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Re: DSO138 oscilloscope
« Reply #4 on: October 17, 2018, 04:14:41 pm »
I implemented some mods to make mine more battery friendly, specifically for a 9V battery supply. It works from about 5.4V - 11V (ie. down to about 0.9V per cell)...

https://jyetech.com/forum/viewtopic.php?f=18&t=744

Use at your own risk (particularly the removal of the reversed supply protection)!
« Last Edit: October 17, 2018, 04:19:13 pm by Gyro »
Best Regards, Chris
 
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