Hey Guys -
As I mentioned a couple of weeks ago, I'm building a new bench supply. I'm using an ATX as the base. I've attached my schematic (please forgive the shoddy work, I had to use MS Word). I plan to have five outputs: 3.3V, 5.0V, 12.0V,-12.0V, and 1.5V-9V adjustable. Red "diodes" are LEDs that indicate "power good." The black diode above the LM 317 is (I'm assuming?) a switching diode to prevent backflow while providing feedback for the voltage regulator. Capacitors are added to the variable output portion before and after the LM 317 to smooth things out.
I'm going to use a six pole rotary switch to select a given output and route it to a volt meter (this is something I wanted specifically for the variable output, but hey, why not make it available to all of them).
Any comments or suggestions for improvement?
As I mentioned a couple of weeks ago, I'm building a new bench supply. I'm using an ATX as the base. I've attached my schematic (please forgive the shoddy work, I had to use MS Word). I plan to have five outputs: 3.3V, 5.0V, 12.0V,-12.0V, and 1.5V-9V adjustable. Red "diodes" are LEDs that indicate "power good." The black diode above the LM 317 is (I'm assuming?) a switching diode to prevent backflow while providing feedback for the voltage regulator. Capacitors are added to the variable output portion before and after the LM 317 to smooth things out.
I'm going to use a six pole rotary switch to select a given output and route it to a volt meter (this is something I wanted specifically for the variable output, but hey, why not make it available to all of them).
Any comments or suggestions for improvement?
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