12v DC to 9v DC

[BigE4u]

So using a 2200µF capacitor it is then... im also guessing since im using a 9v regulator, the slight 12v drop under load will not hurt anything.

Ps- Do i have to replace C1 with the 2200µF capacitor or just add to the rest of the components used.

 

[Willbe]

I'm guessing that the amps-squared-seconds rating of the 'former's internal diodes is about 10, which means the diode can stand 35 A for .008 seconds.
Depending on the internal resistance of the 'former you may want to put a small resistance in series with its output to cushion the current surge from your huge filter cap.

 

[Hero999]

The regulator will work properly providing the input voltage is greater than about 11.5V.

With a 2,200:mu:F capacitor the minimum input voltage will be 11.9V which is fine.

The maximum surge will be around 13A according to LTSPICE and most rectifier diodes can easily handle that.

 

[BigE4u]

So i guess everything is fine then, i'll just add a 2200µF capacitor to the already shown circuit and it should be alright, correct?