ECE Projects
 
 

 

Electronic Projects

       AudioRF Circuits 
     
      Event Detection Circuits 
         
      Math Function Circuits 
         
      Measurement Circuits 
    
      Motor Control Circuits 
         
      Power Supply Circuits 
         
      Sensing Circuits 
         
      Special Function Circuits 
         
      Switching Circuits 
     
      Timing Circuits 
         
      ToneWave Generators 

Simple Regulated Power Supply Circuits

Figure 1.  Circuit Diagram for a Regulated Power Supply

The circuit in Figure 1 uses a full-wave diode bridge rectifier circuit to convert the household AC voltage to an unregulated DC voltage at capacitor C1.  The voltage at C1 is then fed into a voltage regulator IC which outputs a regulated supply voltage, i.e., a voltage that more or less remains at the same level despite changes in load.

Figure 2.  Circuit Diagram for another Regulated Power Supply

The circuit in Figure 2 uses a full-wave two-diode rectifier circuit to convert the household AC voltage to an unregulated DC voltage at capacitor C1.  The voltage at C1 is then fed into a voltage regulator IC which outputs a regulated supply voltage, i.e., a voltage that more or less remains at the same level despite changes in load.

In both examples, the regulator used is the 7805, which outputs 5V DC.  A broad range of other DC voltage regulator IC's is available in the market.  The voltage regulator must be attached to a heatsink if maximum allowable current is required in its operation.