Products > Test Equipment
Cheap bench power supply?
madires:
--- Quote from: slybunda on January 28, 2024, 03:29:31 pm ---Ahh i see. Mostly want to charge up some lead acid batteries like the ones you get in ups 6v and 12v batts. What sort of power supply am i looking at then for this sort of job?
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You can find good lead acid battery chargers for 50 bucks (supporting 6 and 12V).
DaneLaw:
A cheap linear bench PSU, here Korad has been the obvious choice for many over the last decade, simply because of the price.
Korad KA3005D / 31V / 5.1A is around 70 euros and up from European resellers incl. VAT but the Korad KA300X series control scheme is problematic, as you control the output "on/off" by one of the two main knobs by holding it in for a given time, here the KD300X series is preferred, with its dedicated on/off buttons.. - if you control it from PC then you don't have these issues.
Also, the path I went a little over a handful of years back, I purchased one from Europe KA3005P, and one from China KD3003P both with PC control interface (=P).
A look inside..http://tinyurl.com/28upwfre
http://tinyurl.com/5h636f4c
Went with linear to circumvent the noise from switching when working with delicate laser diodes but nowadays, I really don't use them a lot, I primarily use these small switching PSUs like below that can run on fx powerbanks - as the diodes don't seem to mind and it is way easier to manage when your setup are based on mobility in lack of a dedicated bench, here these 4½ kg AC PSU's gets quite cumbersome.
You can obviously daisy chain them to get a higher voltage or amps than the 5.1A or 31V as most linear PSUs are limited at 3A or 5A.
If I were in the market for a linear PSU in 2024, I would pursue one with a graphical interface, as these 7-segmented displays can be a limiting factor, when trying to maintain an overview of your settings etc.
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KungFuJosh:
I have a Tekpower TP3005P I got on Amazon for $100 7 years ago, and it's been great. Seems generally clean and stable.
csuhi17:
To charge the battery, only use a charger or through a charging circuit, do not use a PSU directly.
Even battery chargers can cause problems, I know someone who burned down his shed with a battery charger because he overloaded the charger...
Buy two separate units for charging and feeding.
For charging, there are a couple of RC battery chargers that can charge several types, and they have a variety of protections and parameters.
You have to pay close attention to the setting, because you have to set the number of cells (voltage) separately, not all of them are automatic.
I do not recommend the HTRC T400 duo series because they measure inaccurately.
bingo600:
--- Quote from: audiotubes on January 28, 2024, 02:51:56 pm ---The Korad KA3005PS is supposed to be an update on the prior "P model. I just got the new one for 100 euros to use for some radios while I check out my main POS supply I was using. Seems pretty ok, especially for the price.
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Arrghhhh |O
NOT NICE to reveal that (fine) price :scared:
One Korad KA3005PS on the way from eleshop.eu :palm:
Ended up in 122€ incl shipping to DK
/Bingo
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