Adjustable 0-30V 2A Laboratory DC Power Supply
PCB of Cheap adjustable 0-30V 2A Laboratory DC Power Supply
This
0-30V power supply is the variable voltage Regulator at 2A max, by used
IC-723 for control volt stable regulated. The 2N3055 power transistor for boost up current to 2amp.
It suitable for general electronics work shop. Because it is a simple
circuit and easy circuit. In addition to this has the over current
protection as well.
This circuit is designed using LM723 voltage regulators IC –DIP 20pin
maintain a constant voltage, and a power transistor as the way through
the current to can be used up as wanted.
The circuit was designed also with overload protection or short circuit
in the output. The amount of current flow will not exceed the set.
Because it is monitored constantly by R4.
When the current flows through the R4, until the 0.6V voltage drop
across it. Making Q3 runs short the bias voltage between the
base-emitter of Q2, it stopped working. Now, the Q1 stop working because
does not has the bias voltage to base pin its, The output voltage is
zero or down quite a close to zero.
The potentiometer VR1 acts as adjust the voltage that enter to the LM723
for the volt output by you want. By the our circuit can adjust the
voltage output from 0V to 30V.
In use real, because the properties of the transistors used and values
error of each device. Therefore, if the circuit can not be supply up to 2
A. Try changing the value of R4 is a lower value, until has the maximum
current desired. Should be to use
transformer 3A. The Transistor to Hold Heat sink as well.
