Maged123
Newbie level 1
Hi guys,
I was checking the power supply of a light switch and I found it as below.
A virtual ground was implemented by the circuit below, but I don't understand how it was done. Especially the transformer; it has 4 terminals on one side and 3 terminals on the other. 3 terminals can mean center tab transformer, because the transformer does output 2 levels of voltage- namely 3.3v and 12v- besides the ground. On the other hand, the other 4 terminals of the transformer are ambiguous.
What are these terminals?
What is the model- or family of models- of such a transformer?
Where can I buy such transformer?
I was checking the power supply of a light switch and I found it as below.
A virtual ground was implemented by the circuit below, but I don't understand how it was done. Especially the transformer; it has 4 terminals on one side and 3 terminals on the other. 3 terminals can mean center tab transformer, because the transformer does output 2 levels of voltage- namely 3.3v and 12v- besides the ground. On the other hand, the other 4 terminals of the transformer are ambiguous.
What are these terminals?
What is the model- or family of models- of such a transformer?
Where can I buy such transformer?