stl_jones@yahoo.com
New Member
This is my first project on my own and is really annoying me.
My main goal is to turn an LED on and off with low frequencies with 12V and 0V rails.
I send the amplified RCA signal to the filter. There is a sine-wave on the input of the op amp. However, the output does is at 12V DC with no signal. With a low frequency, the output dips below 12V to about 0V. However, this alternation is only about 1/4 the time that the output is at 12V (20% duty cycle?).
I can't understand why this is happening and am 1000% sure I have it hooked up correctly.
I am using an LM324 op amp, 20k resistors on the filter, .01uF on the filter, and 10k feedback resistors on the filter.
Please help as this is driving me insane.
**broken link removed**
My main goal is to turn an LED on and off with low frequencies with 12V and 0V rails.
I send the amplified RCA signal to the filter. There is a sine-wave on the input of the op amp. However, the output does is at 12V DC with no signal. With a low frequency, the output dips below 12V to about 0V. However, this alternation is only about 1/4 the time that the output is at 12V (20% duty cycle?).
I can't understand why this is happening and am 1000% sure I have it hooked up correctly.
I am using an LM324 op amp, 20k resistors on the filter, .01uF on the filter, and 10k feedback resistors on the filter.
Please help as this is driving me insane.
**broken link removed**