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i want get 20mA current with 24V ac to dc. I have found this power supply module with 6-9A output current but i need max 20mA. What can i add with this module to achieve my settings?

I am powering medical tool so output current must be max 20mA because sometimes the patient have to touch so If i wamt to be safe it must be max 20mA constant output current.

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user3446189
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  • Please edit your question to explain what you are powering. Do you want constant 24 V (constant voltage) or constant 20 mA (constant current). And where is the 24 V AC coming from? – Transistor Feb 19 '19 at 19:37
  • Please read [Choosing power supply, how to get the voltage and current ratings?](https://electronics.stackexchange.com/q/34745/6334) and if you still have questions, come back and edit this post to clarify what you need to know. – The Photon Feb 19 '19 at 19:42
  • I see you have the 4-20mA current loop for something like industrial controls. Your selected approach is not a good starting place for either a sensor/transducer or a receiver. – W5VO Feb 19 '19 at 19:48
  • 150mV ripple may need a filter then you may have CM noise issues. What is this for? – Tony Stewart EE75 Feb 19 '19 at 20:07
  • why do you need to use that particular module? .... it is surely an overkill – jsotola Feb 19 '19 at 21:18
  • Do yourself a favor and just buy a supply that already has the necessary medical approvals. Here is a 10W 24V @ 420mA supply for 20 bucks... https://www.astrodynetdi.com/ecatalog/power-supplies/ASM-0105 – user187594 Feb 20 '19 at 12:54

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I am powering medical tool so output current must be max 20 mA because sometimes the patient have to touch so If i wamt (sic) to be safe it must be max 20mA.

No, for medical devices you don't use cheap power-supplies like this. The risk of harm is too great. Judging by the nature of your question you are not qualified to carry out this work.

Transistor
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