Hi,
I'm hoping to make a simple circuit in which varying output from a flex sensor (http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_150551_-1), turns on one of four discrete circuits.
i.e. from 0 to 1 volts from the sensor, closes only switch A (Circuit A)... from 1 to 2 volts closes only switch B (Circuit B), etc.
I've seen a circuit diagram for a "bargraph voltmeter" which uses an LM339 Quad to control 4 LED's... (http://ecelab.com/circuit-simple-led-voltmeter.htm) and was thinking of replacing the LED's with NPN transistors as switches for the external circuits... but as these external circuits are part of another (low current) device, I'm not sure how the transistors will affect those circuits. I'm also realizing circuit A will stay on as circuit B comes on...
Is there a better solution?
in thanks.
I'm hoping to make a simple circuit in which varying output from a flex sensor (http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_150551_-1), turns on one of four discrete circuits.
i.e. from 0 to 1 volts from the sensor, closes only switch A (Circuit A)... from 1 to 2 volts closes only switch B (Circuit B), etc.
I've seen a circuit diagram for a "bargraph voltmeter" which uses an LM339 Quad to control 4 LED's... (http://ecelab.com/circuit-simple-led-voltmeter.htm) and was thinking of replacing the LED's with NPN transistors as switches for the external circuits... but as these external circuits are part of another (low current) device, I'm not sure how the transistors will affect those circuits. I'm also realizing circuit A will stay on as circuit B comes on...
Is there a better solution?
in thanks.
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