06-30-2018 05:07 AM
Hi,
I am trying to use doubler circuit following to voltage controller circuit to get higher voltage at output. My voltage controller circuit is functioning but doubler circuit is not reacting. any clue?
If any one has doubt why i am using doubler ckt..than answer is my objective is to control voltage regulator through current source which has limitation so voltage controller ckt is not able to provide me output above 19v.
07-26-2018 02:01 PM
You are loading down the output with that 20 ohm resistor. Verify the Astable operation of the 555 output pin. Try making the 20 like 1Meg just to see if you can get a charge pump value out of it.