W.1at i s the value of the potentiometer?
33
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Rx = 636U or the nearest lower standard value (620U ).
BREADBOARD
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GO TO BLOCK 2
PROJECTS
l.
Be c areful to observe proper polarit y when connecting the me ters 1nto the circuit .
3.
Th ts ClfCU i t is 1dent ica l to the I .C . Regulator des1gnt1d 1n the text.
4.
Set the potentiometer to the full CCW posit i on.
UIIIH
5.
Apply power.
6.
Observe the loa d voltage and curren t readout by the meters .
7.
Adjust the potentiometer unt il t he voltmeter ind ica tes SV .
7A .
The CirCUi t IS now adJUSted lor the necessary V ,et to obta in a S.OV output .
8.
D isconnec t the pflm ar y powa1 .
9.
Rem ove the 180 0 R , and replace tt w1th an 82 0 re s is tor .
t O.
Obset ve the load vo ltage and current read out by the meters.
I':!
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,.,
:'ii•IIH
I.
Wite up the
C lf C U i t
s how n
1n
the d i agram. Use R 1 equals tBOH .
111
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HEADED TOWARD THE SURFACE OF MARS AT 15,000 MPH
IS A HELL OF A TIME TO RUN OUT OF QUARTERS!
PLAY METER, February 1, 1984
109