Hi.
I have a question about how to choose the correct op amp. I am just learning and tinkering, so bear with.
My current project has the need to drive a 12v fan at, 12volts. However, I have a signal that is PWM @ 25kHz at -.3v. I am thinking to drive the 12v fan with a transistor.
With this in mind, I have been thinking of an inverting op amp circuit. Simulation shows this to be working. However, now to build real world material, I am in question as to which op amp to use.
Currently I believe in simulation I am using an LM1458 with 2 resistors to keep the output @ 12v. Seems like a pretty simple circuit. I tried an LM324 but I don't believe the gain is enough as I was only able to achieve 10.6v @ output.
What would the considerations be for an op amp for this where the max input is 12v and the frequency is pretty low @ 25khz?
Thank you for any help,
MrWoo
I have a question about how to choose the correct op amp. I am just learning and tinkering, so bear with.
My current project has the need to drive a 12v fan at, 12volts. However, I have a signal that is PWM @ 25kHz at -.3v. I am thinking to drive the 12v fan with a transistor.
With this in mind, I have been thinking of an inverting op amp circuit. Simulation shows this to be working. However, now to build real world material, I am in question as to which op amp to use.
Currently I believe in simulation I am using an LM1458 with 2 resistors to keep the output @ 12v. Seems like a pretty simple circuit. I tried an LM324 but I don't believe the gain is enough as I was only able to achieve 10.6v @ output.
What would the considerations be for an op amp for this where the max input is 12v and the frequency is pretty low @ 25khz?
Thank you for any help,
MrWoo