5 volts high current power supply using 7805 voltage regulator
This power supply electronic circuit is a high current 5 volts power supply circuit that use a 7805 voltage regulator and some classic electronic components.
This 5volt high current power supply is capable to provide a maximum output current of 3 amperes.
T1 acts as a current limiter. Once the voltage on R2 + R3 is greater than 0.6 0.7 V, the transistor opens, which will reduce to zero the current in the base of T2.
Voltage from which enters in operation the protective circuit is given by the sum of drops voltage on the R2 and R3. Resistors R3 and R4 form a voltage divider on T2.