Non-specific Computer Chips

Okay, blegh. Not feeling that motivated to do pixel art nowadays. The stuff I need to do to challenge is HAAARD! Anyway, this seemed like an easy thing to do, so here it is. Computer chips, basically I imagined them as "item sprites" for a sci-fi RPG or something. You could add them to a robot or something to give them new moves or something. Making them was kind of easy, but they came out looking a bit flat... I did some shading to try to mitigate that and I think it works. Maybe. And the one on the right looks a bit... Well, plain... Too uniform or something. The corners really bug me.