100ma charge pump layout.

[nelson]

I thought some people might find this useful for using a 9v supply on those effects that the MAX1044 cant handle. It also has a selectable osc frequency tuneable with an external capacitor for those pedals the MAX1044 causes noise in, perhaps you can use this to find a frequency that doesnt cause noise.


Charge pump that uses the LT1054 (not LT1054L!)



http://homepage.ntlworld.com/paul.nelson666/100%20ma%20Charge%20Pump.pdf



Few suggestions, use it with my clone theory layout,  dlx elec mistress over at GGG or even the echoflanger layout.


Comments welcome.

Paul Nelson

EDIT: Grammar.

[bluesdevil]

Thanks, finally got to put this to use on the PT-80 delay from the GGG site. Noticed something strange when measuring the output voltage of the LT1054 voltage doubling circuit when hooked up to the PT-80 board: it measures at 10.17 volts. Just wondering if it's suppose to self regulate to stay at 18 volts or does it fluctuate depending on what the circuit ahead of it needs?
      I get a reading of  nearly 18 volts without the PT-80 circuit hooked up to it, so basically I was just checking to see if it's normal for it to change under a current draw.
       

[ibodog]

Any chance of getting a live link to that PDF? 

[Crazyyellowfox]

I don't have the PDF in question, but tgere is another LT1054 layout in this thread:

http://www.diystompboxes.com/smfforum/index.php?topic=60871.0

This only works well on low-draw circuits. The voltage output drops significantly on circuits that have a high resistance on the power supply. I've only gotten it to work succesfully on distortions and overdrives.