Desktop power supplies

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Hi All

 

Has anyone had a good experience with cheap power supplies from Amazon?, such a

Variable DC Power Supply (0-30V, 0-10A) KAIWEETS® 3010F Lab Power Supply, 4-Digital LED Display Adjustable Regulated Bench Power Supply for Lab Teaching, Electronic Repair, DIY, with 5V/2A USB Port: Amazon.co.uk: DIY & Tools

 

I am looking for a power supply, where I can adjust both current and voltage using the knobs. At the moment to set the current on my supply I need to short both + and - leads and set the current. 

 

Thanks

Thanks

Regards

DJ

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C: i = "told you so";

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Is it possible to set the current when a device is plugged?

 

I think a lot of power supply have different enclosure but are very similar in Amazon.

Thanks

Regards

DJ

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I have a couple of these:

https://cpc.farnell.com/tenma/72-2535/power-supply-1ch-30v-3a-prog/dp/IN07293

 

no complaints, and they have remote control & readout.

 

They seem to be about the same price  as that Amazon link

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I've had an old lab supply I got off ebay for many years and it;s been a good one.   BK Precision 1660A

Happy Trails,

Mike

JaxCoder.com

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Could you get by with adding your own case and knobs?  The Amazon units shown are self-contained bench-top designs in the 60-100 UK pound sterling range (@$90-$140 USD).

 

But for about 15-20 UK pounds you could get a surplus PC power supply that would convert mains (120-220 VAC depending on region) to +5V, +/-12V @ 10A.  This could be combined with a boost/buck regulator module board to yield a "home-brew" power supply adjustable from +3V to +30V in the 5A range.  You would mount these units in a cage/metal enclosure and add the adjustment control knobs to get a working PS unit roughly similar to the listed Amazon units in specs for about a third of the cost.   But this suggestion may be worthless if you need working reliable bench-top PS units that are ready-to-use without rework.

 

My bench has long had a one-off custom 30VAC_2A_transformer in a surplus steel enclosure that I bought at the Tektronix 'country store' (surplus and discarded lab equipment made available for public purchase- cash-and-carry) for $5 about 30 years ago to meet my adjustable power supply needs.

 

 

Last Edited: Wed. Feb 3, 2021 - 12:27 AM
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I've had an old lab supply I got off ebay for many years and it;s been a good one.   BK Precision 1660A

I have one 1660 too & really like it---it's my goto 99% of the time (maybe because it is 2 feet away).



I have 6 or 7 of various Kikusui supplies...THESE are the real deal for low noise & top quality...I think I bought a supply every other month for a few years...like collecting beany babies

 

https://www.ebay.com/itm/KIKUSUI...

 

 

Here is a QUAD supply I picked up...it is pretty nice...they sold maybe a hundred of these from $50 to $150 every couple of weeks...maybe they still do

here is a listing, but WAIT for a good deal

https://www.ebay.com/itm/Kikusui...

 

This one I just put on a shelf, since it needs some slight mods for the knobs to work (a factory custom of some sort)...they've sold 35 and have more right now:

https://www.ebay.com/itm/Kikusui...

 

 

 

 

 

 

 

When in the dark remember-the future looks brighter than ever.   I look forward to being able to predict the future!

Last Edited: Wed. Feb 3, 2021 - 12:39 AM
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djoshi wrote:

Is it possible to set the current when a device is plugged?

 

I think a lot of power supply have different enclosure but are very similar in Amazon.

If you mean, can the current limit be adjusted whilst the power supply is on, I am not sure, never tried it, but since it is a digital setting, suspect you could.

C: i = "told you so";