ljille
Member level 2
Hello
I hope someone could help me. I suppose somebody with some experience can see easily a simple solution.
My input is a 0-5 Volts signal
I need to replace in a circuit, an usually manual potentiometer of 300 ohms, with a circuit who receive that input (0-5 volts) and act as the potentiometer varying inversely from 300 to 0 ohms.
I thought in an AD converter, but it is not clear for me as I need an analog circuit who accepts, and atenuate, the current wich voltage is between 15 and -15 volts.
I thought in a transistor and resistor array who go bridging a resistors serial as the transistors saturates, but the precision was not good.
Well, I hope somebody could help me,
Sincerly thank you
Luis Jiménez I
I hope someone could help me. I suppose somebody with some experience can see easily a simple solution.
My input is a 0-5 Volts signal
I need to replace in a circuit, an usually manual potentiometer of 300 ohms, with a circuit who receive that input (0-5 volts) and act as the potentiometer varying inversely from 300 to 0 ohms.
I thought in an AD converter, but it is not clear for me as I need an analog circuit who accepts, and atenuate, the current wich voltage is between 15 and -15 volts.
I thought in a transistor and resistor array who go bridging a resistors serial as the transistors saturates, but the precision was not good.
Well, I hope somebody could help me,
Sincerly thank you
Luis Jiménez I