I'm trying to build the above circuit, which is supposed to flash an LED with a schmitt trigger (with the possibility to vary the frequency with the knob of the 47kOhm potentiometer). I don't have a 12V lamp so I replaced it with a red LED. I added it in series with a 1K resistor. The rest is exactly as on the picture.
When I turn on the power, the LED comes on with one intensity and stays like that. Also no matter where I turn the knob of the potentiometer, the intensity of the LED stays the same.
I've triple, quadruple, quintouple checked my connections and they're correct.
Please help. What am I doing wrong?
Edit: I have a 9v 0.45A on hand, but it doesn't even turn on with the upper configuration.