-=> ROY J. TELLASON wrote to WAYNE CHIRNSIDE <=-

 RJT> The other part that jumped out at me as being a little unique was
 RJT> a 565 PLL chip.  I have heard of this one before,  but have *no*
 RJT> idea what you'd do with it.  Any of you guys have any thoughts on
 RJT> the matter

 WC> A fairly low frequency demodulator chip IIRC.
 WC> Likely about the same as you could with a CMOS 4046 which I've more
 WC> experience with.

 RJT> I've yet to get a hold of some of those.  I did find a can of CMOS
 RJT> chips,  and looked through them earlier today.  No PLLs in there but
 RJT> there seems to be one heck of a lot of 4066 chips for some reason.
 
 RJT>  Outside of that,  just a few gates...

Quad digital switches IIRC that can be biased and used in
preamps using different value resistors to control gain.

 RJT> After the CMOS can and the TTL can there was the linear can,  and I've
 RJT> found some interesting stuff in there.  I'm still sorting things out,
 RJT> but aside from the op amps and voltage regulators (more 7805s and 7812s
 RJT> than I'll probably ever use :-) there were some audio amp chips,  and
 RJT> some other ones I couldn't find anywhere (yet).  One I just snagged a
 RJT> datasheet for is the CA3094, apparently another OTA?  I

I believe it's an OTA with enhanced output characteristics.

 RJT>  never did do
 RJT> too much with the 3080,  the first of that sort of chip I ran into.  It
 RJT> was hard to not have seriously heavy distortion coming out of that
 RJT> thing,  I guess maybe some application notes might help.  I wish I'd
 RJT> been able to snag this stuff off the 'net ages ago! :-)

Yup, that too.

Wish I had the circuit for a negative resistance pulser by Forrest
Mims I once had from Popular Electronics.

Very short duty cycle but it pumped an amp or 2 through a LED
during that brief spike making for a very bright LED that could be
seen by detectors at great range.

Would like to pulse some white LEDs I've got now.
White LEDs are available from the local Radio Shack for 4.95 each
or you can get the same thing in a battery operated keychain light
at Walgreens for 1.50 along with 2  3 volt lithium 2016 coin
cells.
The white LED has full length leads with the typical anode
longer arrangement, the white ones have the 2 2016 cells which
fit my watch and the blue ones have 1 2032 which fits my
computer CMOS cell holders :-)
 
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