arorasimran said:
I decided to start off with the PSU
When drawing schematics in Eagle, better start off reading the Eagle handbook, especially on how to use the [Net] button instead of lines and junctions.
I confirm this works and gives out 18v +-15mV symmetrical.
as drawn, not. If your prototype does actually work (with whatever load connected), this will be different from your schematic.
Ignoring the missing junctions and connection to the transformers center tap for your 0V reference voltage, your PSU is not variable with wipers of your trimmers P1,P2 not connected. PSU output is not at the right hand side of the current setting resistors R3,R4. The way you've drawn it, these will limit avail.current to 87.5mA per rail and your output voltage will be 1.25V below regulators output voltage.
What more can be added here for better performance of the supply?
better compared to what -this will be depending on layout of your PCB traces as well- would at least ask for your intended DC current and voltage load and give at least some data of the mains transformers secondary voltage(s) and VA rating.
IMHO missing, reverse protection diodes across the Vregs I/O-pins,
protection diodes across R3,R4 to help from C5,C6 discharging,
maybe required heatsinking of your VRegs, depending on connected load and VRegs I-O differential voltage,
maybe status displaying LEDs per rail to reach the VRegs min.current load, as the 5.7mA from R3,R4 might not draw enough for predictible operation of your VRegs,
...
Get this right first before thinking of additions like +/-V rails tracking, overvoltage or overcurrent protection.
