soldering iron and solder.
screwdrivers, flat and star
hot melt glue gun.
The full wave rectified version has better performance but is a bit noisier if using the optional fan. The fan is a 60mm x 60mm CPU 12 brushless fan which I'm driving at
5v to reduce current consumption and noise.
The half wave version uses fewer components and less current, the smaller size is also trickier to build.
In both versions the negative band on the diode must point towards the ac voltage input.
If you follow the green arrows on the component diagrams, you will first encounter the negative side on the diode first, indicated by the white band.