I has planning on building a bench power supply based on this design.
I want to make some modifications with it by having 2 outputs (plus ground) .
One would be variable. The other a fixed voltage that is selectable (3.3, 9, 12).
Am I better off using two LM317s and using trim pots to get the fixed voltages like he is doing here or would be better off using the individual regulators for each of my desired voltages?
Also I think I understand why he has individual C1 and C2. If I remember correctly, this helps with heat dissipation as opposed to one large cap?
But what is the purpose of C3?
I want to make some modifications with it by having 2 outputs (plus ground) .
One would be variable. The other a fixed voltage that is selectable (3.3, 9, 12).
Am I better off using two LM317s and using trim pots to get the fixed voltages like he is doing here or would be better off using the individual regulators for each of my desired voltages?
Also I think I understand why he has individual C1 and C2. If I remember correctly, this helps with heat dissipation as opposed to one large cap?
But what is the purpose of C3?