1590A Boneyard

[RobA]

Thank you Rob! On the LT1054, I am only putting 9v in but getting +/-18 volts out. I have done the same thing with a TC1044scpa with no problems.

You aren't doing the typical voltage doubler or negative voltage bit then. Are you doing something like Figure 24 from the LT1054 product sheet?

[shawnee]

Yep, that's the one. I don't understand it, but it works.   

[RobA]

Cool, I'll have to try that one out. It looks like it would be good for getting +/- 15V for some of those synth circuits. Thanks!

[shawnee]

I found the layout on a Plexitone circuit that buck sears posted on the freestompboxes forum. It really is a great little circuit.

[papasaurus84]

guys,i found an 18v inverter to be added.so this babe's gonna run in 9v adaptor,but 18v inside.i promise i'll post it soon.

[papasaurus84]

here's the schems for the voltage inverter...

[RobA]

That matches the Dual-Output voltage doubler circuit from the LT1054 spec sheet. The only difference I see is that the spec sheet version uses 1N4001 diodes. I've used 1N5817's with the LT1054 in their other example circuits and it has always been fine. It looks like a pretty slick circuit to use to me.

[papasaurus84]

That matches the Dual-Output voltage doubler circuit from the LT1054 spec sheet. The only difference I see is that the spec sheet version uses 1N4001 diodes. I've used 1N5817's with the LT1054 in their other example circuits and it has always been fine. It looks like a pretty slick circuit to use to me.

Yep. 4001 lower the output voltage much. but i still prefer this one because it's hard to find 5817 in my town. I've done layoutting in eagle but i'm not sure i'm doing right or not. here it is:

[kothoma]

If the bipolar version from the LT1054 spec sheet also works with the TC1044SCPA then it is reasonable to assume it will also work with an ICL7660SCPA?

[papasaurus84]

If the bipolar version from the LT1054 spec sheet also works with the TC1044SCPA then it is reasonable to assume it will also work with an ICL7660SCPA?

dunno for sure but i use 7660SCPA here...

[papasaurus84]

here updated layout,

i use a trimmer for volume and gain pots. i almost never adjust that knob so i decided to change that.

[brejna]

I have layout that is redrawn plexituna layout, I did check it 3-4 times..
here it is if you want it

Cheers
Brane

[papasaurus84]

whoa...thanks a lot brane. that's awesome. my latest post was 18volts 7660SCPA output so maybe lil bit diffrent there. it's not verified yet, but i'll try that soon...

[brejna]

You are welcome, I am pretty sure that layout is ok...
and whatever you do at the end give us results
Cheers

[juansolo]

That's awesome! ...and I'm also slightly gutted as I yesterday populated a v1 boneyard to go into a a 1590B as a 3 knobber. That'd have been perfect for the job. Nev mind