[HUPKW0tv6qs] IBM 5140

IBM 5140 Convertible and 300 baud modem teardown, ANTSDR quick look, IKEA air quality sensor hacks

We look inside an IBM PC 5140 Convertible computer, 300 baud acoustic coupler modem, ANTSDR E310 software-defined radio, and the IKEA VINDRIKTNING air quality monitor. We also tap the signals inside the VINDRIKTNING to see if we can read raw sensor data.

Livestream recorded 2021 October 10.

0:00:00 Intro

First, we look inside the IBM PC 5140 Convertible, a portable computer from 1986.

0:01:30 Disassembling an IBM PC 5140.
1:13:30 Looking at the IBM PC 5140 logic board.
1:20:01 Learning how to reassemble the IBM PC 5140. It was a struggle!

Second, we look inside a Livermore Star 103-232 300 baud modem.

1:52:14 About acoustic coupler modems.
1:54:41 Disassembling the Star 103-232 modem.
1:55:32 Looking at the Star 103-232 circuit board.
2:02:18 Reassembling the Star 103-232 modem.

Third, we take a quick look inside a software-defined radio I received days earlier, the MicroPhase ANTSDR E310. It's based on an Analog Devices AD9363 transceiver chip and an FPGA with an ARM processor.

2:05:24 Introducing the ANTSDR E310, relationship to ADALM-PLUTO SDR.
2:09:21 Disassembling the ANTSDR E310.
2:11:18 Looking at the ANTSDR E310 circuit board.
2:15:30 Reassembling the ANTSDR E310.

Last, I disassemble an IKEA VINDRIKTNING air quality monitor, and use a soldering iron and logic analyzer to tap into the sensor to obtain raw sensor readings.

2:22:14 Introducing the IKEA VINDRIKTNING air quality monitor.
2:22:38 Disassembling the IKEA VINDRIKTNING.
2:23:56 Looking inside the IKEA VINDRIKTNING.
2:28:00 Considering how I'll tap the signals from the air quality sensor on the IKEA VINDRIKTNING.
2:31:36 Soldering wires to tap the air quality sensor data on the IKEA VINDRIKTNING.
2:45:49 Trying (and initially failing) to attach a logic analyzer to the IKEA VINDRIKTNING.
2:55:15 Capturing and decoding air quality sensor data from the IKEA VINDRIKTNING.

=== Links ===

IBM PC 5140 Convertible
https://en.wikipedia.org/wiki/IBM_PC_Convertible

Livermore Star 103-232
(I can't find any decent documentation on this thing, plz halp!!!)

MicroPhase ANTSDR E310
https://github.com/MicroPhase/antsdr-fw
https://www.aliexpress.com/item/1005003181244737.html?spm=5261.ProductManageOnline.0.0.15744edfIp5RL0

...and search GitHub for lots of hacks other people have done!