Re: Power supply-2
- From: Costas Vlachos <c-X-vlachos@xxxxxxxxxxxxxx>
- Date: Wed, 22 Nov 2006 21:59:54 +0200
John Popelish wrote:
lerameur wrote:HI,
I would like to know if anybody tried these power supplies? they are
very cheap, but are they any good.
http://www.abra-electronics.com/catalog/power_supply/abra.html
I have seen very similar looking supplies under a number of brand names (made in China). I recently bought a Mastech dual 0-50 volt version like this:
http://cgi.ebay.com/MASTECH-DUAL-DC-REGULATED-POWER-SUPPLY-0-50-V-0-5A_W0QQitemZ120054624454
It has some sort of relay winding switching circuit that changes the AC supply voltage to the regulator as you change the setpoint, to reduce the power dumped into the heat sinks. It seems to work well, but I would have probably designed it with larger filter capacitors.
Same here. I have the triple output version, different brand, but with LCD displays (4 of them, for V + A). I can hear the relays while changing the voltage set point. Opening the case revealed a textbook linear PSU (with an LM324 and a few LM741's). The 5V/3A output has a nice foldback current-limiting design.
Cheap, but does the job nicely and has never overheated. It would be nice if it had multi-turn pots for the set points, other than this it's a nice general-purpose PSU.
--
Regards,
Costas
_________________________________________________
Costas Vlachos Email: c-X-vlachos@xxxxxxxxxxxxxx
SPAM-TRAPPED: Please remove "-X-" before replying
.
- References:
- Power supply-2
- From: lerameur
- Re: Power supply-2
- From: John Popelish
- Power supply-2
- Prev by Date: Re: Power supply-2
- Next by Date: Re: Power supply-2
- Previous by thread: Re: Power supply-2
- Next by thread: Re: Power supply-2
- Index(es):
Relevant Pages
|
