Dear World,
So, I am just starting to mess around with op amps, and I am already running into trouble. I just completed having built my first dual power supply, and it totally worked! Now I am trying to get a TL082 to function as an audio oscillator. I have posted a schematic here. This circuit is intended to produce a square wave at one point; then, a triangle wave, after integration, at another point. However, I can only get a square wave off of the circuit. When I tap in my headphones at pin 7 and ground, there is a square wave. Yet, pin 1 hasn't a triangle wave. This suggests that the integration portion of the circuit is not operating. Why is this? I am looking to get a triangle wave between pin 1 and ground. I have it wired, as is, on a bread board. The power supply is a 15+/gnd/15-. The capacitor is a non-polar mylar cap. The 100K resistor is variable; I want to have a range of frequencies. All other details seem to be explained int the diagram I am posting. I am planning on changing the capacitor to a 1 uF to lower the frequency, for I'd like to use this as a low frequency oscillator. What is wrong? All is surely connected correctly. Pin 1 gives no wave, just a stagnant charge. I feel like some resistor values need to be changed. The variable R is at 100K, so do the other Rs need to be on a similar scale? This circuit, in order to work properly, needs to have the two other resistors at a similar value, yet one larger than the other. What's up? Any one know what needs to be changed? I'd love to know what is wrong. Might you too be able to tell me 'why' it is screwed up? I need to learn this stuff....
Any help would be absolutely appreciated. Good day.
-Nick
So, I am just starting to mess around with op amps, and I am already running into trouble. I just completed having built my first dual power supply, and it totally worked! Now I am trying to get a TL082 to function as an audio oscillator. I have posted a schematic here. This circuit is intended to produce a square wave at one point; then, a triangle wave, after integration, at another point. However, I can only get a square wave off of the circuit. When I tap in my headphones at pin 7 and ground, there is a square wave. Yet, pin 1 hasn't a triangle wave. This suggests that the integration portion of the circuit is not operating. Why is this? I am looking to get a triangle wave between pin 1 and ground. I have it wired, as is, on a bread board. The power supply is a 15+/gnd/15-. The capacitor is a non-polar mylar cap. The 100K resistor is variable; I want to have a range of frequencies. All other details seem to be explained int the diagram I am posting. I am planning on changing the capacitor to a 1 uF to lower the frequency, for I'd like to use this as a low frequency oscillator. What is wrong? All is surely connected correctly. Pin 1 gives no wave, just a stagnant charge. I feel like some resistor values need to be changed. The variable R is at 100K, so do the other Rs need to be on a similar scale? This circuit, in order to work properly, needs to have the two other resistors at a similar value, yet one larger than the other. What's up? Any one know what needs to be changed? I'd love to know what is wrong. Might you too be able to tell me 'why' it is screwed up? I need to learn this stuff....
Any help would be absolutely appreciated. Good day.
-Nick
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