Power supply help....
Power supply help....
(OP)
Hello Everyone. Best forum by far!
I'm buliding a variable power supply but I'm not sure of what is the purpose of two componets, perhaps one of you can clear this up for me.
http:// www.electr onics-tuto rials.com/ basics/pow er-supp-va riable.htm
Figure 1 - variable bench power supply schematic
My question is:
What is the function od D5 and D6???
Thanks in advance.
JRGarcia13
I'm buliding a variable power supply but I'm not sure of what is the purpose of two componets, perhaps one of you can clear this up for me.
http://
Figure 1 - variable bench power supply schematic
My question is:
What is the function od D5 and D6???
Thanks in advance.
JRGarcia13





RE: Power supply help....
RE: Power supply help....
5. Diodes D5 and D6 are for protection in the event either the input or output are shorted. The resistor R1 connects across the anodes of both D5 and D6 and nowhere else. Look closely at diagram. R1 does NOT connect to the "out" line. Similarly C4 connects from "output" to ground and NOWHERE else.
RE: Power supply help....
Looks like it connects to the output to me... How else does the LM317 get output feedback if it doesn't?
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Power supply help....
RE: Power supply help....
RE: Power supply help....
JRGarcia.
RE: Power supply help....
Vout=1.25V*(1+R2/R1)
TTFN
RE: Power supply help....