Hi!
Do you know Chua's circuit? It is a simple circuit which exhibits chaotic dynamics as the value of a variable resistor is changed. As it happens with all chaotic systems it is very sensitive to small changes in its parameters.
As the simulations with pspice show, the signal (voltage) I would like to measure ranges from -10V to 10V approximately. My data acquisition system is Arduino, whose analog inputs allow a voltage range of [0V, 5V]. So I thought of adding a voltage divider to scale the signal to [-2.5V, 2.5V] and then add to it 2.5V with a non-inverting summer (using an op-amp) to move the range to [0V, 5V].
When simulating Chua's circuit with this addition the behavior of the circuit is very much affected. Have you any idea of how to implement this in a way that it's 'invisible' to the circuit?
I guess the answer has to do with impedances, but about it I know almost nothing. I can post the circuit if you want.
Do you know Chua's circuit? It is a simple circuit which exhibits chaotic dynamics as the value of a variable resistor is changed. As it happens with all chaotic systems it is very sensitive to small changes in its parameters.
As the simulations with pspice show, the signal (voltage) I would like to measure ranges from -10V to 10V approximately. My data acquisition system is Arduino, whose analog inputs allow a voltage range of [0V, 5V]. So I thought of adding a voltage divider to scale the signal to [-2.5V, 2.5V] and then add to it 2.5V with a non-inverting summer (using an op-amp) to move the range to [0V, 5V].
When simulating Chua's circuit with this addition the behavior of the circuit is very much affected. Have you any idea of how to implement this in a way that it's 'invisible' to the circuit?
I guess the answer has to do with impedances, but about it I know almost nothing. I can post the circuit if you want.