24vdc -12mA supply

hey guys..where could i find a schematic for a supply with a 24Vdc input and can output a 12mA current???

If the output you need is a fixed 12mA current into any device it is called a "constant current source" and can be made easily with a LM317 chip (a simple 3pin regulator chip) and one resistor to set the current.

The circuit is usually shown in the LM317 datasheet which you can download from the internet.

Do a google search for constant current source. You can use also use transistors to make one.

Timescope