Dear All,
I need your advice about a subject. Here it is;
I have pressure sensor which is used for the water level in washing machine.
First of all, let me explain how a pressure sensor works. It is a circuit which uses pressure as input and gives square wave with variable frequency as output according to the pressure . So if the washing machine is empty, it produces 9.5 Hz frequecny, if it is 150mm full of water it produces 10.125 Hz and if the water machine is 300mm full of water it gives 10.75 Hz. So I want to check these values for being sure that they are correct. Here are the conditions;
1- If the water level is zero, empty, it produces 9.5 Hz so for example there must be a GREEN LED ON for this value. Otherwise there must be RED LED ON.
2- If the water level is half, 150mm, it produces 10.125 Hz so for example there must be a GREEN LED ON for this value. Otherwise there must be RED LED ON.
3- If the water level is full, 300mm, it produces 10.75 Hz so for example there must be a GREEN LED ON for this value. Otherwise there must be RED LED ON.
Do you have any idea about this kind of project or have you ever done this kind of work?
Do you think that I have to use a microcontroller?
I upload two images for the circuit of pressure stat and the graphich water level vs frequency.
Thanks in advance
I need your advice about a subject. Here it is;
I have pressure sensor which is used for the water level in washing machine.
First of all, let me explain how a pressure sensor works. It is a circuit which uses pressure as input and gives square wave with variable frequency as output according to the pressure . So if the washing machine is empty, it produces 9.5 Hz frequecny, if it is 150mm full of water it produces 10.125 Hz and if the water machine is 300mm full of water it gives 10.75 Hz. So I want to check these values for being sure that they are correct. Here are the conditions;
1- If the water level is zero, empty, it produces 9.5 Hz so for example there must be a GREEN LED ON for this value. Otherwise there must be RED LED ON.
2- If the water level is half, 150mm, it produces 10.125 Hz so for example there must be a GREEN LED ON for this value. Otherwise there must be RED LED ON.
3- If the water level is full, 300mm, it produces 10.75 Hz so for example there must be a GREEN LED ON for this value. Otherwise there must be RED LED ON.
Do you have any idea about this kind of project or have you ever done this kind of work?
Do you think that I have to use a microcontroller?
I upload two images for the circuit of pressure stat and the graphich water level vs frequency.
Thanks in advance
Attachments
-
41.5 KB Views: 11
-
25.9 KB Views: 13