kangyunmei
Banned
Hi guys, I'm trying to build a high power regulated power supply for a 12v fan (need about 30A at 12V) control and I found a website where such a power supply is discussed.
In these pictures a power supply is laid out according to attachment.
However, I'm not really getting how the voltage regulator is capable of controlling the output voltage without any kind of loop back.
Also, when I put it together I'm getting a .3v drop between each of the stages of transistors, is this normal? eg from vr I get 8.97v, but after the first mje3055 I get 8.69v, and after the 2nd set of amplification I get 8.3v. Is that normal?
Thanks guys, I'm a total beginner when it comes to circuits but I'm trying to learn as this stuff is really interesting.
In these pictures a power supply is laid out according to attachment.
However, I'm not really getting how the voltage regulator is capable of controlling the output voltage without any kind of loop back.
Also, when I put it together I'm getting a .3v drop between each of the stages of transistors, is this normal? eg from vr I get 8.97v, but after the first mje3055 I get 8.69v, and after the 2nd set of amplification I get 8.3v. Is that normal?
Thanks guys, I'm a total beginner when it comes to circuits but I'm trying to learn as this stuff is really interesting.