Creating a high voltage current source controlled by microcontroller

• #25 Reply
  Posted by Zero999 on 22 Aug, 2017 22:38
• Quote from: sean87 on 22 Aug, 2017 22:18

  Quote from: Hero999 on 22 Aug, 2017 22:02

  Does the actual current need to be controlled by the MCU or will just on/off action do?
  

  
  Well On/Off is fine in the worst case, but now that we are going to this much trouble, why not a true VCCS? is there too much difference between having it as On/Off or a true VCCS?
  

  Because there are simpler ways of doing this if it only needs to be on or off?
• #26 Reply
  Posted by sean87 on 22 Aug, 2017 23:03
•  Ok i am all ears for only an on/off solution...
• #27 Reply
  Posted by Zero999 on 23 Aug, 2017 18:02
• I'd use the TL431. Q1 and Q2 can be replaced with a single TIP121, to reduce complexity.
  

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