TL431 shunt regulator

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Baterka274

Joined Oct 2, 2015
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I have got a circuit which works as high current shunt regulator and indicator of battery status (for stethoscope). Input voltage from battery is 9V and output voltage 5V. I have finished my indicator yet, but I am not sure about regulator and his values. Can you help me with values of resistors in this regulator (R16, R20, R22)? I use diode TL431 in this circuit.
Thank you very much
Tom
 

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