Electrical Engineering
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Ken Shirriff
  • Member for 10 years
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About

Interested in computer history and reverse engineering old chips. Currently restoring a Xerox Alto.

Some projects: Wrote the Arduino IRremote library for infrared remotes. Attempted Bitcoin mining on a 55 year old IBM punch card mainframe. Got six symbols added to Unicode including the Bitcoin symbol (₿).

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Top posts
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All Questions Answers
Score Newest
answer
23
Can you help me identify this manufacturer's logo on this component
Jan 2
answer
16
does 8085 CPU have an extra register within ALU?
Mar 23, 2017
answer
14
How can I duplicate Apple's tiny USB power adapter?
May 19, 2012
question
8
Why the extra transistors in this current mirror?
Mar 15, 2017
answer
7
What is the reasoning for the arithmetic functions on the 74181?
Jan 6, 2017
answer
7
history of edge-triggered D flip-flop design using three S-R latches
Aug 8, 2019
answer
6
What is the name of the current that creates the potential difference in an opamp?
Mar 27, 2017
answer
5
Chaotic circuit for random number generation
Jan 9, 2017
question
5
How to analyze S-R latch circuits?
Aug 9, 2019
answer
5
How to connect Aref (Avcc and Agnd) and where to place the bypass capacitor?
Dec 21, 2016
Top network posts
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57
Homebrew will not run wget command (Library not loaded)
38
Were people building CPUs out of TTL logic prior to the 4004, 8080 and the 6800?
36
Pillow: strange behavior using Draw.rectangle
27
A two-thresholds poison: how does it work?
26
Could the museum Saturn V's be refitted for one more flight?

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