Night light project. (My first project.)
I need some help to select some components.
I have a 240 VAC/50 Hz voltage supplying a Bridge Rectifier (4x1N4007) with an output of 24VDC for 6 blue LED in series.
I have to step down the voltage from 240VAC to 24VDC. I don’t know how drop the voltage from 240VAC to 24VAC. It is where I need some help.
From what I read, to step down the voltage, I need a Cx capacitor (?? µf 400V) and one resistor R1 (??Ω) in parallel to discharge the capacitor and another R2 (??Ω) resistor on the other side.
I know the Bridge Rectifiers change the current from AC to DC and I will need another C1 capacitor to smooth the ripples and a resistor of R3 (120 Ω) before my 6 LED.
I could use the values already available on different websites but I would like know the step by step for selecting the Cx Capacitor and the 2 resistors before the Bridge Rectifier.