Hi
I am after some help with a simple PWM controller with a voltage regulator built in. It is to control a fuel pump. It has a 15V supply, however I would like to be able to control the supply voltage between 5V and 15V with an analog 0-10VDC input. This also really needs to have a controllable frequency range of 10Hz to 10KHz, again from an input to the board. Finally the MSR will need to have a range of 0 - 100%.
I have made a PWM controller on its own but the square wave is rounded.
I am fairly new to electronics, so any help will be greatly appreciated.
Thank you
Ollie

 

Hello,

Can you post a schematic of what you have upto now?
With that in hand we can have a look how to modify it.

Bertus

 

how 'round' ?

Can you post a scope shot?