Here’s something I’ve been looking for for awhile now for a project I’ve got in the works, and figured some of you guys may be looking for the same thing. They’re based off of the schematic published by the one and only R.G. Keen, found here.
Layout 1: +9V to +17V
Layout 2: +9V to +25V
Layout 3: +9V to +33V
Remember to watch your electrolytics voltage rating, especially with the +33V charge pump
Note: You can NOT substitute the MAX1044 for 7660s or NE555 IC.