"* * * male half bridge" and "* * * female half bridge" can form bridge full-wave rectification;
If the transformer has two windings, and the center tap of the winding is grounded, the "* * * cathode half bridge" can also be used for full-wave rectification and output positive voltage;
similarly, if the transformer has two windings and the center tap of the winding is grounded, then the "* * * male half bridge" can also be used for full-wave rectification and output negative voltage;
"* * * Yang Half Bridge" and "* * * Yin Half Bridge" are generally sold on commission in China, and Taobao is very common, with a few yuan each.