Thursday, December 25, 2014

Circuit Schematic 5V DC Regulated Power Supply with Short Circuit Protection

Eltronicschool. - Maybe you only find the circuit schematic 5V DC regulated power supply without short circuit protection now. But in here you will find this circuit with circuit protection like short circuit. So, in this time we will show you simple Circuit Schematic 5V DC Regulated Power Supply with Short Circuit Protection

This circuit schematic using two kinds output that are regulated 5V DC with short circuit protection and without circuit protection. The main circuit is protected from any damage due to short-circuit in the additional power supply circuit by cutting off the derived supply voltage. The derived supply voltage restores automatically when shorting is removed. An indicator LED is utilized to show whether short-circuit exists or not.

Circuit Schematic

Figure 1. 5V DC Regulated Power Supply with Short Circuit Protection  (Source:circuitdiagram)

Component List
  1. Transformator 230V AC Primary to 9V AC, 300mA
  2. Diode 
  3. Capacitors
  4. Transistors
  5. Resistors
  6. IC LM7805
  7. LED
  8. All Component list see in figure 1 above


Circuit schematic like in figure 1 above is 5V DC Regulated Power Supply with Short Circuit ProtectionThe working of this circuit is quite simple. When the 5V DC output from regulator IC 7805 is available, transistor BC547 conducts through resistors R1 and R3 and LED1. As a result, transistor SK100 conducts and short-circuit protected 5V DC output appears across O/P2 terminals. The green LED (LED2)  lows to indicate the same, while the red LED (LED1) remains off due to the presence of the same voltage at both of its ends. See more in source below.

Source Link:

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