The voltage regulator I'm using has 4 pins (2 in, 2 out) pictured below.
The reason I purchased this regulator is that I want to convert +12V DC in to +5V DC current for connecting a Sony Projector to a compatible 3D transmitter. From a post on avsforum I can conclude that pins 1 and 2 from the sony transmit +12V DC. They will be soldered together, and connected to the "+" 12V Input section of the voltage regulator. However, what do I do with the "-" port of the input?
Also on the 3d transmitter end, it expects a +5V DC, which I presume I should connect to he "+" section on the output label of the regulator, but what happens to the "-" side here?
Fig1. SINOLLC DC 12V 24V to 5V 3A Converter Step Down Regulator 5V Regulated Power Supplies Transformer Converter
Fig2. Pin description of the VESA 3d Transmitter (note pin "A", which is +5V)