Photo Cell Sensor

Thread Starter

nubbins

Joined Nov 22, 2013
3
I have a 12vdc photo cell sensor, when triggered a 3.3v is on the output.

How can I get a 12vdc out when the sensor is triggered?
 

wayneh

Joined Sep 9, 2010
16,102
You could use an external transistor. What's the voltage at the output when not triggered?

Also, please provide details of your sensor. It could be an open collector output.
 

#12

Joined Nov 30, 2010
18,076
The instructions say it outputs 3.3 volts.
This circuit will convert that to "0 volts to 12 volts" with a current capability of 50 milliamps. You can change the resistor values to get different amounts of current. You can add another transistor to get the voltages to be "12 volts to 0 volts".
 

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#12

Joined Nov 30, 2010
18,076
What else would it represent? Some other transistor that I imagined connected to a sensor you are not talking about?
 
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