Jack Harkness
New Member
Hello, I know that there have been similar questions but I am still a bit confused as to how this can be done.
The problem: I have a DC 12V 200mA power supply that I want to convert to a DC 12V 10mA supply.
The application: I want to use this supply to power 2 amplifiers (one instrumentation and one operational) that I want to used to regulate the output of a load cell (they output 3mv/V). So I have done some research and by using these amplifiers I can get the output of the load cell to be between 4-20ma (standard) but it had not occurred to me that the amperage of the power supply would be a problem (I have used op-amps before and never had a problem with amperage). So it all comes down to how can I reduce that 12V 200mA supply to 12V 10mA without frying any components (the end product will be left running for weeks at a time). So power dissipation is also a concern.
Any help would be appreciated. Also please let me know if any of what I have said is unclear.
The problem: I have a DC 12V 200mA power supply that I want to convert to a DC 12V 10mA supply.
The application: I want to use this supply to power 2 amplifiers (one instrumentation and one operational) that I want to used to regulate the output of a load cell (they output 3mv/V). So I have done some research and by using these amplifiers I can get the output of the load cell to be between 4-20ma (standard) but it had not occurred to me that the amperage of the power supply would be a problem (I have used op-amps before and never had a problem with amperage). So it all comes down to how can I reduce that 12V 200mA supply to 12V 10mA without frying any components (the end product will be left running for weeks at a time). So power dissipation is also a concern.
Any help would be appreciated. Also please let me know if any of what I have said is unclear.