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This simple low-cost
DC power supply circuit provides very stable DC voltage (adjustable)
from 1.2V to 24V. The use of LM317T regulator IC simplifies the
circuit by reducing the number of required external components. The
total parts count is less than 10
The maximum output
current is 1A
You may use it to
power your electronic projects that requires stable DC supply.
FEATURES :
OUTPUT VOLTAGE RANGE: 1.2 TO 24V
0.1% LINE AND LOAD REGULATION
BUILT-IN PROTECTIONS: CURRENT LIMITING, THERMAL SHUTDOWN AND SOA
CONTROL
Equation for calculation of
output voltage:
Vout =1.25 x ( 1+ VR1/(R3+R4) )
where R3 =470Ω,
R4= 56Ω
& VR1 adjustable from 0 ~ 10KΩ
Eg.:
VR1=0Ω
when it's fully counter-clockwise, Output voltage =
1.25x(1+0/(470+56)) = 1.25V
VR1=10K
Ω when
it's fully clockwise, Output voltage =
1.25x(1+10,000/(470+56)) = 1.25x(1+19) = 25V
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