- Mon Jun 25, 2012 8:31 pm
#146597
I don't know what the problem is, but opamps hate me. I have gotten one to function as a square wave oscillator, not what most would consider a 'normal use' for an opamp. threw it together on a breadboard worked perfectly the first time.
Now here's where the problem lies: I've tried hooking one up as an error amp, put 2 volts in, output of my regulator is slammed against the positive rail.
Hooked one up as a buffer, most basic opamp circuit there is, put in 2 volts. Output is either locked against vcc, or it's bouncing off the rails.
Currently working on a 1.25-16 volt power supply project which I have an arduino controlled DAC hooked up to a opamp as a reference and then to my output regulator adjust pin as an error amp/voltage gain. I needed some active error correction and voltage gain and thought "I'll just throw an op amp in there". Not once has it worked for me. I'm a little dissapointed and frustrated.
Insight appreciated.
Edit: I sjould probably add that im not new to electonics and I understand how op amps should work, and by all rights they should, but in the 2 years I've tried, I've never had one do what its supposed to.
Now here's where the problem lies: I've tried hooking one up as an error amp, put 2 volts in, output of my regulator is slammed against the positive rail.
Hooked one up as a buffer, most basic opamp circuit there is, put in 2 volts. Output is either locked against vcc, or it's bouncing off the rails.
Currently working on a 1.25-16 volt power supply project which I have an arduino controlled DAC hooked up to a opamp as a reference and then to my output regulator adjust pin as an error amp/voltage gain. I needed some active error correction and voltage gain and thought "I'll just throw an op amp in there". Not once has it worked for me. I'm a little dissapointed and frustrated.
Insight appreciated.
Edit: I sjould probably add that im not new to electonics and I understand how op amps should work, and by all rights they should, but in the 2 years I've tried, I've never had one do what its supposed to.