[sdiy] UA726 clone possible?

[Tom Wiltshire]

Interesting idea.

Looks feasible, at least as far as a functional clone goes. Getting it into the same shape/size package would be trickier. Since the original just has ten wires sticking out of the bottom, I don't particularly see the need to keep the original dimensions exactly. It'd be enough if the legs poke through the existing holes and you solder it in and you're done. In fact, that'd be a big step forward!

Given the current prices for dodgy counterfeits and questionable parts, there's probably a small but grateful market for a reliable modern replacement.

Tom

PS: Datasheet is here, if anyone fancies a look:

http://robot-and-machines-design.com/Files/Datasheets/Fairchild%20Semiconductor/uA726.pdf


On 9 Sep 2015, at 14:21, Tom Bugs <admin at bugbrand.co.uk> wrote:

> Sorry, please reply to this one so it has a new thread title:::
> 
> ********************************
> 
> I wondered before why no-one seems to have done a clone of the ua726.
> 
> Doesn't *SEEM* all that complex?!
> A nice matched pair (eg LS318) is the main core.
> 6 transistors (I presume general purpose?), 2 x 6V2 zeners and 6 standard resistors.. - those parts being for the heating element.
> 
> Get the pin placement right, encapsulate it in goo..
> 
> What am I wrong on?
> 
> [I don't want to fully take on such a project, though could potentially do a design up for initial testing with a view to someone running a production in a friendly open-source-ish manner]
> 
> Tom
> 
> 
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