http://tinyurl.com/y7pkf7gd
Here I designed my own measurement water level circuit.
The left hand-side which has open circuit wires is used to put in the water and let the water conduct a current.
But I'm wondering about my LED, Is it going to blow up if I only use 470 Ohm's resistor? Do you have any recommend for my circuit. Thanks for help.
Here I designed my own measurement water level circuit.
The left hand-side which has open circuit wires is used to put in the water and let the water conduct a current.
But I'm wondering about my LED, Is it going to blow up if I only use 470 Ohm's resistor? Do you have any recommend for my circuit. Thanks for help.