Page 109 - Testing Electronic Components
P. 109
Testing Voltage Regulator IC
A voltage regulator IC
As the name suggest, this electronic component regulates an output
voltage. Pin 1 is the input dc voltage, pin 2 is the ground and pin 3 is the
output. As the circuitry adds more load to a power supply, the output
voltage tends to drop. A regulator circuit (voltage regulator) keeps the
output voltage steady, in spite of changes in the load.
Put it simple, any dc voltage from 7V to about 38 V enters the pin 1 of
7805 voltage regulator then expect a +5 V output at pin 3. Any voltage in
109
