PgrAm
Newbie level 6
I recently assembled this schematic on a breadboard:
the circuit is powered by a 9v battery and I also have an LED connected between the output and ground and the 100k resistor is replaced by a 100k potentiometer. I have used two different op-amps in the circuit and each seems to have different problems, when using a 4558 the led stays on all the time and does not oscillate at all, when I use a tl072 the led stays off all the time also with no oscillation. Here a picture of my circuit with the 4558:
I can't seem to figure out why my circuit doesn't work, could it be that I need a bipolar power supply? If so is there a way to modify the circuit to work on a single pole?
I designed the circuit using this web-app:
https://www.falstad.com/circuit/e-triangle.html
the circuit is powered by a 9v battery and I also have an LED connected between the output and ground and the 100k resistor is replaced by a 100k potentiometer. I have used two different op-amps in the circuit and each seems to have different problems, when using a 4558 the led stays on all the time and does not oscillate at all, when I use a tl072 the led stays off all the time also with no oscillation. Here a picture of my circuit with the 4558:
I can't seem to figure out why my circuit doesn't work, could it be that I need a bipolar power supply? If so is there a way to modify the circuit to work on a single pole?
I designed the circuit using this web-app:
https://www.falstad.com/circuit/e-triangle.html