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Re: sla charging schematics ?


mmmmm    * found * a circuit, using a lm317, 3 resisters, 2 capacitors ,
which i think comes in well under 5$

i wasnt talking about the transformer , only the circuit,,,,


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http://www.jaycar.com.au/productView.asp?ID=MB3522&keywords=MB%2D3522&form=KEYWORD
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http://www.jaycar.com.au/productView.asp?ID=MB3603&CATID18%&formCA%T&SUBCATID29%5
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Re: sla charging schematics ?


wrote as  :

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Try take a look at the C200 data sheet, you can make a charger from
schematics on there with settable max charge rate AND settable max V with
this chip - total cost of charger probably around £10. If C200 are still
available!
Much cheaper if you use a C200 ic plus bits out of your scrap boxes!
Charlie+

Re: sla charging schematics ?



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Sorry in above post - for C200 Read L200  and here is any ole website from
search, with schematic ....
http://www.zen22142.zen.co.uk/Circuits/Power/l200.html
Charlie+

Re: sla charging schematics ?



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 For that kind of pin count, I'd rather go for a switcher like an LM2576
or similar.  You can have adjustable Vout max AND Imax, more current
capability than the L200, AND lower heatsink requirements to boot.

 It would cost more, but the transformer/power supply would weigh with a
significant part of that anyway.

 Would still cost more than a commercially built one of course, but
you'd learn a great deal.

 On second thoughts, if you're currently dealing with the basics, this
might be a bit steep to design from scratch... :-)

Re: sla charging schematics ?


On Wed, 9 Jun 2010 13:14:58 +0930, "mark krawczuk"

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First do a google search for slua115.pdf, which is an app-note for the
Unitrode/TI SLA charger chip.  Apart from giving you some of the best
care and feeding info, it shows a schematic for a dead-simple SLA
charger (Fig4, p 4/12).  The kit which Altronics/Jaycar(?) produced
several years back was a very close copy of that schematic.

Re: sla charging schematics ?


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http://www.pdfdownloadlibrary.com/topics/battery-charger-schematic/page/4

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