OpenSprinkler › Forums › Hardware Questions › Power Supply Design Questions › Reply To: Power Supply Design Questions
December 6, 2015 at 12:06 pm #40935
Actually it has always been half-wave rectifier and has never been full-wave (where did you see the full-wave or bridge?)
The 0.1uF filter caps were added to a number of places as bypass filtered. These help a lot with handling voltage spikes.
D3 is indeed a zener diode.