please help me in making circuit diagram of my project.
"i want to make the water over flowing project which geton/alaram when the tank is ful or going to overflow"
please help me me by giving me circuit diagram of this project
check www.discovercircuits.com, they have an alphabetical list of schematics, you might want to check 'a' for alarm circuits you should find something relating to your work.
There are many types of water level alarm.
Water pressure, as an inication of level.
Water conductivity, operates when level rises and touches conductor.
Floats, probably the most common type.
There are other methods, for special circumstances.
please help me in making circuit diagram of my project.
"i want to make the water over flowing project which geton/alaram when the tank is ful or going to overflow"
please help me me by giving me circuit diagram of this project
do a search for an audio oscillator, and build it. As soon as you managed to produce a tone, your circuit is 99% done.
Now disconnect one battery terminal from the circuit, and instead of connecting the hanging wire and the battery terminal to a switch, you connect it to the water. Yes, use another wire! You dont want both battery terminals to be simultaneously connected to the water!!!
do a search for an audio oscillator, and build it. As soon as you managed to produce a tone, your circuit is 99% done.
Now disconnect one battery terminal from the circuit, and instead of connecting the hanging wire and the battery terminal to a switch, you connect it to the water. Yes, use another wire! You dont want both battery terminals to be simultaneously connected to the water!!!
An alarm could be just a red LED.
In which case all you need to add is a couple of single cells,
and some wire.
Just position the wire ends to touch the water at the desired level,
and put the LED somewhere visible.
(my post has crossed with Nigel's - i found that the water made
a suitable resistor for the LED, did it in a cup, only took a few
minutes.)
The posted circuit has not been properly designed.
On one side we have a TRIAC, while we have a SCR on the other side.
As the SCR can only conduct on the positive half cycle, it will only present a load to the transformer when it conducts. Therefore the triac will also only conduct for 50% of the AC waveform.
Pure water does not conduct electricity, it is a very good insulator.
De-ionised water is checked by measuring is electrical resistance. The higher the resistance the purer the water.
Very high power radio transmitters (100kW), use water to cool the anodes of the power amplifier valves (tubes). The anodes have many kV on them.
However put some thing like salt or sulphuric acid in water and you have a good conductor.
Where probes with voltege are dipped into the water you will get some electrolysis taking place which could give confusing results if the amount of current is critical to the circuit operation.
Also electrolytic action may "eat away" one or both of your probes after a length of time.
Salt and fertilizer in damp soil make a fairly good conductor that increases its resistance as the soil dries.
Where probes with voltage are dipped into the water you will get some electrolysis taking place which could give confusing results if the amount of current is critical to the circuit operation.
Also electrolytic action may "eat away" one or both of your probes after a length of time.