This is my first PCB design based on the ATmega328P. All components are through the hole, took me some time to make the board without any vias. The board has an LM2576 3A 5V switching regulator. The L1 inductor is a lot bigger then the outline on the PCB that's why there is so much space around it. I'm new to Eagle so I haven't bothered making a symbol for it. I already have most parts including the LM2576 regulator and 3A 100µH inductor. I have one issue though, the regulators that I bought don't have the pins staggered, they are all 5 straight. When I put the regulator on the PCB in Eagle using a TO220-5 symbol with straight pins I couldn't get it to pass a DRC check. Even after changing the TO220-5 symbol to the smallest pads. It always complains that there is not enough space between the pads. So I just used the staggered symbol and I thought of just bending the pins on my regulators
Does my design look ok? Or won't this work? I'm a bit worried about the regulator, that's why I've put so many caps on the board. I have a decent stock of caps so I might as well use them...
Datasheet of the regulator can be found here: http://www.datasheetcatalog.org/datasheet/nationalsemiconductor/DS011476.PDF
The board will be used for a couple of small robots using a bunch of small SG90 servos. With this design I can just connect the servos directly on the board. The regulator is powerful enough to power the servos. Power supply will come from a 2 cell Lipo battery.
I've attached the schematic