Electronics : AD Output
I want to use this circuit to convert the analog outputs of my home installation to digital outputs. Since I don't need this project immediately it's still in the development stage.
Schematic :
The analog output controller has the following specifications :
- Outputs : 12
- Output voltage : 0 to 10V
- Current : 2mA
This is only a small part of the actual convertor schematic. You need everything, execpt for the power supply, four times.
The supply of this contactor module is done by a 7812 voltage regulator. Thr 0-10V output of the controller is connected to
R3 and the anode of D3. I used an optocoupler CNY74 to ensure a galvanic isolation between the controller and this circuit.
The input current is limited to 1mA. The output is connected to a darlington transistor Q3. This transistor can directly swith the 12V DC contactor.
This contactor can now switch the 230V AC load. The LED shows the contactor status and has a built-in resistor.
Since this circuit is still in the development stage, there is no PCB built yet. Revisit this page please ...
Schematic and PCB :
To view this schematic you need the Eagle program. You can download a limited version : Eagle Soft USA
Project :
AD interface
Sources :
At the "My favorites" page you can find external links for some more information.
Click here to visit my homepage
Content - Electronic circuits,projects and schematics : AD output - Stego