Carl Martin Plexi Lt1054 sub

[maiko]

http://effectslayouts.blogspot.com/2017/03/carl-martin-plexi-tone.html

Thinking about building that but was wondering regarding the LT1054 would i be able to
substitute a icl7660s for that.    basing on the pinouts it looks like its a direct replacement

any inputs greatly welcomed and grateful for. 

[bluebunny]

I believe the function of pin 1 is different in each chip.  It's unconnected in this schematic using the LT1054.  If you use the 7660S, then you need to connect pin 1 to pin 8 to avoid an audible whine.

[maiko]

Thanks for the reply


I really sorta want to build this one but the charge pump things got me worried.