By way of an intro, from a first timer, Hello! Great site.
I'm fairly new to electronics, too (this will be my 3rd completed circuit), btw...
I'm struggling to make myself a; bi-polar*, dc, auto-tracking^, bench-top power supply from various circuits around the internet. This is the one I want to make...
I think I'm good up to the outputs from the voltage regulators. It's the op-amp that's killing me (the design calls for a LM301, is the LM741CN a suitable substitute?).
I can't get the LM337 voltage regulator to alter its output. The LM317 adjusts fine from 0v - +17v, using the potentiometer. The LM337 side of things just stays at -17v.
The only other components that are different to the stated design is:
* my transformer is a centre tapped 72va 240v.
* my bridge rectifier is a W01G.
* my ripple capacitors (directly after rect.) are single 4700μF 35wv's.
Any help would much appreciated!
* bi-polar = 17v - 0v - +17v outputs. Is "bi-polar" the correct word for this?
^ auto-tracking = that both sides, of the minus and positive power supply outputs, can be simultaneously altered through a single control?
I'm fairly new to electronics, too (this will be my 3rd completed circuit), btw...
I'm struggling to make myself a; bi-polar*, dc, auto-tracking^, bench-top power supply from various circuits around the internet. This is the one I want to make...
I think I'm good up to the outputs from the voltage regulators. It's the op-amp that's killing me (the design calls for a LM301, is the LM741CN a suitable substitute?).
I can't get the LM337 voltage regulator to alter its output. The LM317 adjusts fine from 0v - +17v, using the potentiometer. The LM337 side of things just stays at -17v.
The only other components that are different to the stated design is:
* my transformer is a centre tapped 72va 240v.
* my bridge rectifier is a W01G.
* my ripple capacitors (directly after rect.) are single 4700μF 35wv's.
Any help would much appreciated!
* bi-polar = 17v - 0v - +17v outputs. Is "bi-polar" the correct word for this?
^ auto-tracking = that both sides, of the minus and positive power supply outputs, can be simultaneously altered through a single control?