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April 27, 2021 Archives
Tuesday, April 27, 2021
CONTEXT: Forbidden Colours: Can You See Bluish Yellow?
Here is more about forbidden (or impossible) colours, including crossed-eye fusion pairs which may allow you to perceive bluish yellow and reddish green. Some people appear able to see them, others can't—it worked for me.
What's “crossed-eye fusion”? Here's a guide for how to do it, from the Solar System Live help documents.
Posted at
14:28
CONTINUITY: Vacuum Tube Computer, Part 11: Building a 4-bit Decoder for the Instruction Register
Continuing with the vacuum tube re-implementation of the Motorola MC14500 microcontroller, next on the agenda is the decoder which de-multiplexes the four bit instruction code into 16 lines which control the circuitry that executes the instruction. You can think of this as a vacuum tube 74LS154 [PDF].
Posted at
11:52
THE HAPPENING WORLD: SpaceX Starship SN15 Static Fire and Reaction Control System Tests
If these tests are deemed successful, a test flight may occur later this week.
Posted at
11:21