shall greatly appreciate if a anybody can answer my queries.
this is a DC supper supply (circuit diagram attached ) which i did few years back for my electronic class project. at that time i didn't not face any technical issues. But at present when i did the same project with the same schematic guide i get numerous issues.
1. number of my circuit got burnt (10 k pot) when i try to adjust the voltage ? why did it happen? can i have detailed explanation.
2. Once when everything seems okay with the circuit. there was a wrong reading (shows 5v when it should be 1.25v) when you adjust 10 pot to minimum.... Can anybody explain to me why?
3. finally after going through numerous website i found a solution to the burning potentiometer issue, that is to insert a
1N4007 diode between adjustable pin + out pin and used another diode between out pin + in pin.... will this save me from
further trouble..... please advice.
thanks in advance for your co-operation
this is a DC supper supply (circuit diagram attached ) which i did few years back for my electronic class project. at that time i didn't not face any technical issues. But at present when i did the same project with the same schematic guide i get numerous issues.
1. number of my circuit got burnt (10 k pot) when i try to adjust the voltage ? why did it happen? can i have detailed explanation.
2. Once when everything seems okay with the circuit. there was a wrong reading (shows 5v when it should be 1.25v) when you adjust 10 pot to minimum.... Can anybody explain to me why?
3. finally after going through numerous website i found a solution to the burning potentiometer issue, that is to insert a
1N4007 diode between adjustable pin + out pin and used another diode between out pin + in pin.... will this save me from
further trouble..... please advice.
thanks in advance for your co-operation
Attachments
-
118.3 KB Views: 53