This guide will let you know how to find Circuit Boards from different locations in Planet Crafter. You may also craft them using some items.
First, go to the blueprint board and unlock and craft the circuit board under the terraformation section. Ensure that you have a circuit board in the crafting section. It will take nitrogen, bioplastic, silicon, iron, aluminium, and zeolite. So you need to go to the gas extractor tier 2 and you will find it requires a circuit board.
Go to blueprints and decode the Microchip Deconstruction T2 by unlocking it. However, you must have the T1 already.
Go to crafting station T2 and you will find that deconstruction tier 2 will take original deconstruction, one methane cartridge, and a zeolite.
Make your way to the main starter ship or any ship to put the deconstructor on. Find the servers that look like this and deconstruct them to get circuit boards. You will also find circuit boards in the chest if you go to newer locations.
After that, go to the waterfall and downside there will be another ship. Go inside, see around the room with servers, and deconstruct them to get circuits.
Go to another bunker-type area and head inside to find more circuits and some other things as well from the chests.
Once you get a suitable system, you can craft them from iron, silicon, and aluminium. You may need these circuit boards for different items.