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help with basic circuit

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#RPIM

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i need to know how to do this or atleast the name of what can do this


i am making a diy project but i have gottne stuck my input device is a miosture detector and it sends out an iput current when there is moisture but i want it to send out a current when there isnt a current

please reply or give me a link to the answer

thank you
 

MikeMl

Well-Known Member
Most Helpful Member
Welcome,

Can you post a link (or the data sheet) for the sensor you are going to use? What voltage powers your system? What do you want the sensor to control?

Unlikely that the sensor puts out a "current"; more likely it puts out a voltage. Making a circuit that inverts when the load is turned on is simple ( a couple of resistors and a transistor). Can you handle that if we give you the values? Knowing were you are located (in the world) helps us suggest where to buy components.
 

spec

Well-Known Member
Most Helpful Member
i need to know how to do this or atleast the name of what can do this


i am making a diy project but i have gottne stuck my input device is a miosture detector and it sends out an iput current when there is moisture but i want it to send out a current when there isnt a current

please reply or give me a link to the answer

thank you
Hello RPIM,

Almost certainly we can suggest a circuit to do what you want, but we would need definative information about your requirements and the characteristics of your moisture detector.

spec
 
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