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dave cox · 8th Jul 2020, 2:24 pm

Yea,
TL431 could replace the 6V2 zener (6V8 on the schematic)
Should work at 2mA.
Drop the ref to 2.5V so no additional resistors needed.
Let R3=2K5.

The pot with the voltage is NOT nice

dc

8th Jul 2020, 2:24 pm	#36
dave cox Nonode Join Date: Jan 2009 Location: Bristol, UK. Posts: 2,061	Re: High voltage regulator circuit. Yea, TL431 could replace the 6V2 zener (6V8 on the schematic) Should work at 2mA. Drop the ref to 2.5V so no additional resistors needed. Let R3=2K5. The pot with the voltage is NOT nice dc