Post by @xenotar

xenotar
@xenotar
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I am supervising a second-year electrical engineering undergraduate on a microcontroller programming project using MicroPython. Before he went on vacation last month, I introduced him to wire wrapping. He was fascinated and spent the rest of the afternoon playing with the tool and the wire—making connections, undoing them, and testing things out. This technique is no longer taught in undergraduate programs. I think he’ll love this photo of the first IBM PC prototype.

Tube🌞 Time @tubetime@mastodon.social

in honor of the IBM PC's 45th anniversary today, here is the original prototype motherboard!

which side is your favorite?

a large prototyping circuit board with a grid of holes. it is covered with chips and red bypass capacitors soldered diagonally across many of the chips. you can tell it is a PC because of the 5 ISA slots and the keyboard connector.
a large prototyping circuit board with a grid of holes. it is covered with chips and red bypass capacitors soldered diagonally across many of the chips. you can tell it is a PC because of the 5 ISA slots and the keyboard connector.
the bottom of the board reveals a ratnest of yellow wires along with a few thicker blue and black wires, presumably for power and ground.
the bottom of the board reveals a ratnest of yellow wires along with a few thicker blue and black wires, presumably for power and ground.