Power Ground Water Pen The blade does not lock

The blade does not lock when it is out

Featured here with Pen Type-B

but easy to open post

click to release the magnet + bypass the latch

Power Ground Water Pen The blade does not lockA series of printed circuit boards [PCBs] weave a narrative from the fundamentals of electronics, to the transistor, logic gates, computational building blocks to a programmable micro controller. A series of "physical lecture notes" present a low level entry point into the material of electronics. This perspective is usually reserved for engineers, and obfuscated within the sealed boxes of our phones and computers. Here we consider the material of