1. So I get this uses the diode as a half rectifier and the capacitor and regulator just do more work to finish smoothing out the voltage why is this preferable to the full rectifier?
2. I used the formula linked dc42 in response 4 (5 * .65A)/(24VAC * 60hz) = 0.00225F double that since we are using only half wave ac and that's 4.5mF or 4500uF so why do you suggest a 100uF Cap?
3. So In my previous circuit I was using 3 regulators since in the previous ardunio.cc discussion I linked to they were concerned that using only one would require it to dissipate to much voltage and run hot why is that different in my circuit?
OK so 90mA to drive the arduino and triacs we would calculate to (5×.09)/(24×60)=0.0003125 or 312.5uF. so would a 300-330uF cap work?
I was looking at capacitors what voltage would that need to be rated for 24Volts? or since this is after the diode do we need to apply either Vrms=Vpeak/2 or Vdc = Vpeak/3.14 and a 1.4 multiplier to determine the required voltage rating of the capacitor?