I am building a power supply for a train set. The PS has 3 O/P, 1 12V ±3A and 2 variable 12V ±1.5A suplies. Now the problem I am getting is that I am not able to supply the required current, as soon as I connect the required load the O/P voltage drops from 12V to 6V. I tried connecting a power transistor to supply the extra current but when it is turned on I only get the I/P voltage to the regulator at the O/P? I would like to know how I can get the extra current if there is a way. The regulator that I am sing is LM317, smoothing cap form rectifier is 3300uF O/P smoothing cap is 1000uF. For the static 12V R1 = 82
hm: R2 = 820
hm: and for the adjustable: R1 = 500
hm: R2 = 5k
hm: would appreciate any advice as how to resolve this.
This is sort of what i want to use, it's just the basic layout of the circuit.
**broken link removed**
These are the circuits i used as refrence to try and increase the current.
Thanks to ImageShack for Free Image Hosting
This is sort of what i want to use, it's just the basic layout of the circuit.
**broken link removed**
These are the circuits i used as refrence to try and increase the current.
Thanks to ImageShack for Free Image Hosting
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