12V to 5V regulator short-circuit protected

765

13:00:51

Can't find a 7805 but need a regulated 5V supply?
Top transistor is TIP29 or similar. 
Others can be 3904, 2222, pretty much any NPN.
.47 ohm resistor should be around 2W.

Variable resistance used to fine-tune voltage when using real world components with tolerances. 
Top right horizontal switch simulates connecting a load. 
Vertical switch illustrates the short-circuit protection. 

published 5 years ago

PrathikP

5 years ago

Using that 1mF capacitor is highly NOT recomended. I causes problems like delay in the regulator's response to variations in the load or input voltage. Don't put any capacitance over there.

PrathikP

5 years ago

See http://everycircuit.com/circuit/5509201907154944

PrathikP

5 years ago

Now the same thing without a capacitor http://everycircuit.com/circuit/6664454945898496

PrathikP

5 years ago

And using a constant current source also helps http://everycircuit.com/circuit/6305068551503872

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