Hello Friends as a electronics hobbyst we all need a power supply on work bench, we also need -ve rail power supply to power various electronics Eg- OpAmp etc. today in this part i am going to shere a very common type power supply made up of common electronics components,.For more Detailed info please visit my channel or watch video above.
Step 1: Step Down Transfarmer
In this Project 12-0-12 volt center tapped transfarmer is used to step down mains voltage, as it is more robust and easy to handle rather then SMPS, because of its simplicity i utilize it in my project.
Step 2: KA7912 ( -12 Volt Regulator)
KA7912 is used to regulate -ve Rail of power supply As this is very simple to use in this project.
Pin2= -ve Input
Step 3: LM7812 (+ve Voltage Regulator)
LM7812 used in this project to regulate +ve supply Rail to +12v.
Step 4: Bridge Rectifier
Bridge rectifier is used in this project to convert AC signal to DC , Bridge rectifier can be made using 4 Diodes. IN4007 (1000volt 1Amp).
Step 5: Capacitor
Capacitor used in this project used to convert pulsating DC to Smooth DC. To ensure good stability.
Step 6: Schematic Diagram
Assamble all the components as shown in circuit diagram.
Step 7: All Done
All Components are assembled in PCB. If you want to see it working you can also check my video