Design giving the necessary ratings and characteristics the necessary for the transformer, bridge rectifier capacitor and regulator , a 12v , 2A regulated power supply .
the available mains supply is 230v+10% @50hz
so far I have :
Regulator - Standard voltage regulator will require 2v to be maintained across it to prevent drop out , therefore input voltage should not drop below 14v
Transformer - Va atleast 50% & volt drop = 24v
Capacitor - the minimum peak voltage to the regulator input
(24-10%) x 1.414 - 2 = 28.8v
maximum peak voltage
(24+10%+10%)x1.414-1.4 = 38.9v
The minimum peak full hand voltage defines the minimum of ripple voltage (28.8-14) = 14.8
suitable reservoir capacitor ?
I am uncertain if these figures are even correct , I think I am close but could do with some guidance