Hi,
in know that topics abt power supply's have been answered to in the past, but i can't find what my little project requires....
i know how to make a +/- 5V power supply(using LM317/LM337 or the LM7805/LM7905);
i know how to make a +/- 12V power supply (using LM317/LM337 or the LM7812/LM7912)and;
i know how to make an AC to DC 5V-12V power supply(incorporating the LM317/LM337 with the variable resistor to increase or decrease the output voltage)....
my power supply is supposed to incorporate all three....
i will be using a step-down transformer... but how to incorporate it for all three and as well as how to get the....
yeah i know i am asking u brilliant ppl to do my project for me but am stumped...
google'ed it but to no avail as the diagrams only show one or the other....
doesn't explain whether the +/- ??V supply circuit can be used for the 5-12 V variable power supply as well or not..
if it can how does it work exactly???
as i got no scanner so can't show u my circuit diagram...
but the link here is almost exactly the same except the C3,4,5,7 am not using...
http://www.electronics-lab.com/projects/power/015/
no rush...
i got 2 weeks to go...
in know that topics abt power supply's have been answered to in the past, but i can't find what my little project requires....
i know how to make a +/- 5V power supply(using LM317/LM337 or the LM7805/LM7905);
i know how to make a +/- 12V power supply (using LM317/LM337 or the LM7812/LM7912)and;
i know how to make an AC to DC 5V-12V power supply(incorporating the LM317/LM337 with the variable resistor to increase or decrease the output voltage)....
my power supply is supposed to incorporate all three....
i will be using a step-down transformer... but how to incorporate it for all three and as well as how to get the....
yeah i know i am asking u brilliant ppl to do my project for me but am stumped...
google'ed it but to no avail as the diagrams only show one or the other....
doesn't explain whether the +/- ??V supply circuit can be used for the 5-12 V variable power supply as well or not..
if it can how does it work exactly???
as i got no scanner so can't show u my circuit diagram...
but the link here is almost exactly the same except the C3,4,5,7 am not using...
http://www.electronics-lab.com/projects/power/015/
no rush...
i got 2 weeks to go...