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General => Open Discussion => Topic started by: selfdestroyer on January 22, 2015, 08:11:52 AM

Title: Switching between ICs
Post by: selfdestroyer on January 22, 2015, 08:11:52 AM
I am working on a project that I would like to wire up a toggle to switch from a LM301 ot a LM308. Is it as easy as tying the pins together and just do the switching of V- & V+  to supply power to the chip I want to use? I have never done anything like this and before I kill a few chips I thought I would ask.

I swore I seen a Beavis Audio project that he stacked 4 ICs and bent the pins out for the power supplies and used that to switch with. Or did I dream this all up?
Edit: I found the page: http://www.beavisaudio.com/projects/ScreamerLab/ (http://www.beavisaudio.com/projects/ScreamerLab/)

datasheets
http://www.ti.com/lit/ds/symlink/lm301a-n.pdf (http://www.ti.com/lit/ds/symlink/lm301a-n.pdf)
http://www.ti.com/lit/ds/symlink/lm308-n.pdf (http://www.ti.com/lit/ds/symlink/lm308-n.pdf)

Cody
Title: Re: Switching between ICs
Post by: mremic01 on January 22, 2015, 08:30:40 AM
I've done it with the LM308 and OP07CP. You can use a 3PDT if you're ok with giving each LM its own compensation cap. I recently picked up some 6PDT rotaries from Mouser specifically for IC switching. It took months for the backorder to come in.
Title: Re: Switching between ICs
Post by: mandrewbot3k on January 24, 2015, 05:08:43 AM
I'm pretty sure you can use a double pole switch and just switch on the input pins maybe output to avoid extra noise


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