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317 for the HP-42S

By Ton van de Burgt

Solver program for handling a LM317 Voltage Regulator.

Vout = Vref (1+ R2/R2) + Iadj x R2

Usualy R2< 1k so the error term Iadj x R2 can be neglected.
Vref = 1.25 V

Vout = 1.25 (1+R2/R1)


Start the solver and select “317”

Fill in the known values and solve for the unknown value.

Binary files for emulators:
Raw binary: 317.raw  Binary for HP-42X: 317.42x (HP-48) 31749.42x (HP-49)

Generated by 42s2html - 10 November 2004, 22:04