OK i made a sketch to reflect that...
Personally, I would use a lower value than 180 Ohms so the regulator carried say the first 0.5Amps
The usual current booster design uses a PNP bypass like shown below. If you don't use the L (low power) type, then the 180 Ohm resistor can be made smaller to pass more of the current through the regulator itself.
The original design is flawed. It is connected like a 317 although it is a 78L05. In any case that configuration will not work correctly. The usual current booster design uses a PNP bypass like shown below. If you don't use the L (low power) type regulator, then the 180 Ohm resistor can be made smaller to pass more of the current through the regulator itself.
The original design is flawed. It is connected like a 317 although it is a 78L05. In any case that configuration will not work correctly. The usual current booster design uses a PNP bypass like shown below. If you don't use the L (low power) type regulator, then the 180 Ohm resistor can be made smaller to pass more of the current through the regulator itself.
What about the base connection? It is made at the input of the regulator.
I tested the circuit just now with a 12v transformer and I got 15VDC out but no adjustment from the 5k pot
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