Water level indicator using ULN2803
i made an water level indicator using IC: ULN2803
Refer: Easiest water level indicator
It works well when used on glass of water, but when connect to my rooftop tank all the leds slowly diminishes and turns off. I think this has to do with high resistance of the tank water, but i doubt it since it worked well for first few days.
i am not any expert (clearly) so any help is appreciated.
integrated-circuit uln2003
asked 2 hours ago
Alex Robbin
213
add a comment |
i made an water level indicator using IC: ULN2803
Refer: Easiest water level indicator
It works well when used on glass of water, but when connect to my rooftop tank all the leds slowly diminishes and turns off. I think this has to do with high resistance of the tank water, but i doubt it since it worked well for first few days.
i am not any expert (clearly) so any help is appreciated.
integrated-circuit uln2003
asked 2 hours ago
Alex Robbin
213
Certainly @user156047 is right. You might use a pushbutton to power the circuit only when you want to read the level.
– Dorian
2 hours ago
@Dorian ok, let me try with non corrosive metal strips and get back.
– Alex Robbin
2 hours ago
add a comment |
i made an water level indicator using IC: ULN2803
Refer: Easiest water level indicator
It works well when used on glass of water, but when connect to my rooftop tank all the leds slowly diminishes and turns off. I think this has to do with high resistance of the tank water, but i doubt it since it worked well for first few days.
i am not any expert (clearly) so any help is appreciated.
integrated-circuit uln2003
asked 2 hours ago
Alex Robbin
213
i made an water level indicator using IC: ULN2803
Refer: Easiest water level indicator
It works well when used on glass of water, but when connect to my rooftop tank all the leds slowly diminishes and turns off. I think this has to do with high resistance of the tank water, but i doubt it since it worked well for first few days.
i am not any expert (clearly) so any help is appreciated.
integrated-circuit uln2003
integrated-circuit uln2003
asked 2 hours ago
Alex Robbin
213
asked 2 hours ago
Alex Robbin
213
asked 2 hours ago
Alex Robbin
213
asked 2 hours ago
Alex Robbin
213
asked 2 hours ago
Alex Robbin
213
213
Certainly @user156047 is right. You might use a pushbutton to power the circuit only when you want to read the level.
– Dorian
2 hours ago
@Dorian ok, let me try with non corrosive metal strips and get back.
– Alex Robbin
2 hours ago
add a comment |
Certainly @user156047 is right. You might use a pushbutton to power the circuit only when you want to read the level.
– Dorian
2 hours ago
@Dorian ok, let me try with non corrosive metal strips and get back.
– Alex Robbin
2 hours ago
Certainly @user156047 is right. You might use a pushbutton to power the circuit only when you want to read the level.
– Dorian
2 hours ago
Certainly @user156047 is right. You might use a pushbutton to power the circuit only when you want to read the level.
– Dorian
2 hours ago
@Dorian ok, let me try with non corrosive metal strips and get back.
– Alex Robbin
2 hours ago
@Dorian ok, let me try with non corrosive metal strips and get back.
– Alex Robbin
2 hours ago
add a comment |
2 Answers
2
active
oldest
votes
I'm not big in chemistry, but I believe that it has stopped working because of electrolysis. In other words your contacts have corroded to the point that the resistance is too high.
You could prevent this by using AC, but then the circuit would be a lot more complicated.
I would opt for capacitive sensors, Analog Devices have an interesting app note about
Capacitive Liquid Sensors
Or you can follow this
Instructable
answered 2 hours ago
user156047
59118
I don't think AC will stop electrolysis but the corrosion must be the issue he's facing.
– Dorian
2 hours ago
@user156047 I too think you are right, but i dont understand anything about Capacitive liquid sensors. But, if i were to replace the contact points with something non-corrosive and have less chance for electrolysis would that work?
– Alex Robbin
2 hours ago
@AlexRobbin Maybe it would be better to use large electrodes. Not only the corrosion but also mud or particles attracted by the current flow might play a role in this. If you have large electrodes they will have a low impedance even covered with some impurities.
– Dorian
1 hour ago
For what I remember from my Uni days, there are two possible causes to corrosion, one is electrolysis and the other dissimilar metals. Electrolysis is the splitting of water cells, and that requires I believe 1.23V to happen. Unfortunately this means that for conducting the electricity you will only rely on the impurities of the water. I don't think it is a dissimilar metal issue due to the voltage you use.
– user156047
1 hour ago
You can easily check this by inspecting the probe wires, right?
– immibis
28 mins ago
add a comment |
It's due to corrosion, electrolysis.
Go with some alternative thing like Float switches.
FLOAT SWITCH - SAMPLE
answered 37 mins ago
Satish Singupuram
5239
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
I'm not big in chemistry, but I believe that it has stopped working because of electrolysis. In other words your contacts have corroded to the point that the resistance is too high.
You could prevent this by using AC, but then the circuit would be a lot more complicated.
I would opt for capacitive sensors, Analog Devices have an interesting app note about
Capacitive Liquid Sensors
Or you can follow this
Instructable
answered 2 hours ago
user156047
59118
I don't think AC will stop electrolysis but the corrosion must be the issue he's facing.
– Dorian
2 hours ago
@user156047 I too think you are right, but i dont understand anything about Capacitive liquid sensors. But, if i were to replace the contact points with something non-corrosive and have less chance for electrolysis would that work?
– Alex Robbin
2 hours ago
@AlexRobbin Maybe it would be better to use large electrodes. Not only the corrosion but also mud or particles attracted by the current flow might play a role in this. If you have large electrodes they will have a low impedance even covered with some impurities.
– Dorian
1 hour ago
For what I remember from my Uni days, there are two possible causes to corrosion, one is electrolysis and the other dissimilar metals. Electrolysis is the splitting of water cells, and that requires I believe 1.23V to happen. Unfortunately this means that for conducting the electricity you will only rely on the impurities of the water. I don't think it is a dissimilar metal issue due to the voltage you use.
– user156047
1 hour ago
You can easily check this by inspecting the probe wires, right?
– immibis
28 mins ago
add a comment |
I'm not big in chemistry, but I believe that it has stopped working because of electrolysis. In other words your contacts have corroded to the point that the resistance is too high.
You could prevent this by using AC, but then the circuit would be a lot more complicated.
I would opt for capacitive sensors, Analog Devices have an interesting app note about
Capacitive Liquid Sensors
Or you can follow this
Instructable
answered 2 hours ago
user156047
59118
I don't think AC will stop electrolysis but the corrosion must be the issue he's facing.
– Dorian
2 hours ago
@user156047 I too think you are right, but i dont understand anything about Capacitive liquid sensors. But, if i were to replace the contact points with something non-corrosive and have less chance for electrolysis would that work?
– Alex Robbin
2 hours ago
@AlexRobbin Maybe it would be better to use large electrodes. Not only the corrosion but also mud or particles attracted by the current flow might play a role in this. If you have large electrodes they will have a low impedance even covered with some impurities.
– Dorian
1 hour ago
For what I remember from my Uni days, there are two possible causes to corrosion, one is electrolysis and the other dissimilar metals. Electrolysis is the splitting of water cells, and that requires I believe 1.23V to happen. Unfortunately this means that for conducting the electricity you will only rely on the impurities of the water. I don't think it is a dissimilar metal issue due to the voltage you use.
– user156047
1 hour ago
You can easily check this by inspecting the probe wires, right?
– immibis
28 mins ago
add a comment |
I'm not big in chemistry, but I believe that it has stopped working because of electrolysis. In other words your contacts have corroded to the point that the resistance is too high.
You could prevent this by using AC, but then the circuit would be a lot more complicated.
I would opt for capacitive sensors, Analog Devices have an interesting app note about
Capacitive Liquid Sensors
Or you can follow this
Instructable
answered 2 hours ago
user156047
59118
I'm not big in chemistry, but I believe that it has stopped working because of electrolysis. In other words your contacts have corroded to the point that the resistance is too high.
You could prevent this by using AC, but then the circuit would be a lot more complicated.
I would opt for capacitive sensors, Analog Devices have an interesting app note about
Capacitive Liquid Sensors
Or you can follow this
Instructable
answered 2 hours ago
user156047
59118
answered 2 hours ago
user156047
59118
answered 2 hours ago
user156047
59118
answered 2 hours ago
user156047
59118
59118
I don't think AC will stop electrolysis but the corrosion must be the issue he's facing.
– Dorian
2 hours ago
@user156047 I too think you are right, but i dont understand anything about Capacitive liquid sensors. But, if i were to replace the contact points with something non-corrosive and have less chance for electrolysis would that work?
– Alex Robbin
2 hours ago
@AlexRobbin Maybe it would be better to use large electrodes. Not only the corrosion but also mud or particles attracted by the current flow might play a role in this. If you have large electrodes they will have a low impedance even covered with some impurities.
– Dorian
1 hour ago
For what I remember from my Uni days, there are two possible causes to corrosion, one is electrolysis and the other dissimilar metals. Electrolysis is the splitting of water cells, and that requires I believe 1.23V to happen. Unfortunately this means that for conducting the electricity you will only rely on the impurities of the water. I don't think it is a dissimilar metal issue due to the voltage you use.
– user156047
1 hour ago
You can easily check this by inspecting the probe wires, right?
– immibis
28 mins ago
add a comment |
I don't think AC will stop electrolysis but the corrosion must be the issue he's facing.
– Dorian
2 hours ago
@user156047 I too think you are right, but i dont understand anything about Capacitive liquid sensors. But, if i were to replace the contact points with something non-corrosive and have less chance for electrolysis would that work?
– Alex Robbin
2 hours ago
@AlexRobbin Maybe it would be better to use large electrodes. Not only the corrosion but also mud or particles attracted by the current flow might play a role in this. If you have large electrodes they will have a low impedance even covered with some impurities.
– Dorian
1 hour ago
For what I remember from my Uni days, there are two possible causes to corrosion, one is electrolysis and the other dissimilar metals. Electrolysis is the splitting of water cells, and that requires I believe 1.23V to happen. Unfortunately this means that for conducting the electricity you will only rely on the impurities of the water. I don't think it is a dissimilar metal issue due to the voltage you use.
– user156047
1 hour ago
You can easily check this by inspecting the probe wires, right?
– immibis
28 mins ago
I don't think AC will stop electrolysis but the corrosion must be the issue he's facing.
– Dorian
2 hours ago
I don't think AC will stop electrolysis but the corrosion must be the issue he's facing.
– Dorian
2 hours ago
@user156047 I too think you are right, but i dont understand anything about Capacitive liquid sensors. But, if i were to replace the contact points with something non-corrosive and have less chance for electrolysis would that work?
– Alex Robbin
2 hours ago
@user156047 I too think you are right, but i dont understand anything about Capacitive liquid sensors. But, if i were to replace the contact points with something non-corrosive and have less chance for electrolysis would that work?
– Alex Robbin
2 hours ago
@AlexRobbin Maybe it would be better to use large electrodes. Not only the corrosion but also mud or particles attracted by the current flow might play a role in this. If you have large electrodes they will have a low impedance even covered with some impurities.
– Dorian
1 hour ago
@AlexRobbin Maybe it would be better to use large electrodes. Not only the corrosion but also mud or particles attracted by the current flow might play a role in this. If you have large electrodes they will have a low impedance even covered with some impurities.
– Dorian
1 hour ago
For what I remember from my Uni days, there are two possible causes to corrosion, one is electrolysis and the other dissimilar metals. Electrolysis is the splitting of water cells, and that requires I believe 1.23V to happen. Unfortunately this means that for conducting the electricity you will only rely on the impurities of the water. I don't think it is a dissimilar metal issue due to the voltage you use.
– user156047
1 hour ago
For what I remember from my Uni days, there are two possible causes to corrosion, one is electrolysis and the other dissimilar metals. Electrolysis is the splitting of water cells, and that requires I believe 1.23V to happen. Unfortunately this means that for conducting the electricity you will only rely on the impurities of the water. I don't think it is a dissimilar metal issue due to the voltage you use.
– user156047
1 hour ago
You can easily check this by inspecting the probe wires, right?
– immibis
28 mins ago
You can easily check this by inspecting the probe wires, right?
– immibis
28 mins ago
add a comment |
It's due to corrosion, electrolysis.
Go with some alternative thing like Float switches.
FLOAT SWITCH - SAMPLE
answered 37 mins ago
Satish Singupuram
5239
add a comment |
It's due to corrosion, electrolysis.
Go with some alternative thing like Float switches.
FLOAT SWITCH - SAMPLE
answered 37 mins ago
Satish Singupuram
5239
add a comment |
It's due to corrosion, electrolysis.
Go with some alternative thing like Float switches.
FLOAT SWITCH - SAMPLE
answered 37 mins ago
Satish Singupuram
5239
It's due to corrosion, electrolysis.
Go with some alternative thing like Float switches.
FLOAT SWITCH - SAMPLE
answered 37 mins ago
Satish Singupuram
5239
answered 37 mins ago
Satish Singupuram
5239
answered 37 mins ago
Satish Singupuram
5239
answered 37 mins ago
Satish Singupuram
5239
5239
add a comment |
add a comment |
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Certainly @user156047 is right. You might use a pushbutton to power the circuit only when you want to read the level.
– Dorian
2 hours ago
@Dorian ok, let me try with non corrosive metal strips and get back.
– Alex Robbin
2 hours ago