![]() The transistor should be non-conducting with -10V on its base so the integrator should be giving out +11V not -11V. That is half the job of being an engineer, to understand your circuit well enough and do the required measurements to correct any issues. You need to measure some voltages to determine the cause of the problem. I've included a picture of my current breadboard layout below: I will gladly provide any other information if needed. I've narrowed my focus to the transistor in my testing, so I wanted to start there when asking my question. I tried to replicate the exact behavior in the simulator, and I found that if I added a ground output to the collector leg of the BC547, the simulation behaved the exact same way as the breadboard.Īpologies if I left out any important information. What's interesting is that I can flip the transistor around and reverse the Collector and Emitter legs in the simulator, and it still oscillates correctly. I believe I am connecting the transistor with the correct pinout. However, on the breadboard, my voltage levels remain static (Triangle +11V, Square -10V). In the simulation, adding in the BC547 allows it to start oscillating as intended. When re-introducing the BC547, I start seeing inconsistencies between the simulation and my breadboard. I've narrowed my focus to the Transistor (BC547) because if I test the entire circuit after removing this component, everything behaves identically between the simulator and breadboard: My main problem is that the simulator and my breadboard are showing different behavior when connecting the Transistor (BC547). I am specifically referencing the section titled "Oscillator Core". The exact circuit I am trying to build can be found at this link. NOTE: I built all simulated diagrams with Falstad Circuit Simulator. BC547 Connected - Re-connected the BC547 Transistor and started seeing inconsistencies.BC547 Removed - Removed the BC547 Transistor to confirm all other components are working.Intended Circuit Diagram - The complete circuit I am trying to build.I will try to explain my problem referencing the following pictures: I am trying to build an oscillator circuit that will output a Triangle Wave and Square Wave in tandem (trying to dip my toe into building modular synthesizers). I am brand new to building circuits, so I apologize if I use the incorrect terminology. ![]()
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