jah

Joined 18 years ago

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Sep 25

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Comment · 3 years ago

Savoir-Faire (https://ifdb.org/viewgame?id=p0cizeb3kiwzlm2p) is another incredible game of hers.

Comment · 4 years ago

I'm a huge fan of the base16 color schemes - not for their appearance (though most look great), but for their ease of integration within the shell and vim. Just clone the repos below, drop a few lines in your shellrc/vimrc, then use a single bash command to change the scheme in both. No more mucking with Xresources.

https://github.com/chriskempson/base16-shell

https://github.com/chriskempson/base16-vim

Comment · 4 years ago

This mapping is the new default in Neovim 0.6 (https://github.com/neovim/neovim/commit/5a111c1b02bbfbc2b42d...)

In place of a legal notice, here is a blessing github.com

247 jah 4 years ago 107 comments

Comment · 4 years ago

You're absolutely correct about RF noise. In the US, the FCC limits the power of all spurious emissions to be at least 43dB below the power of the fundamental frequency. Typically transmitters use a low pass filter (e.g. Buttersworth or Chebyshev) to reduce harmonic content.

Some micro transmitters (at the very low mW level) omit the LPF entirely. Looking at the datasheet for the ATtiny85, the maximum output current is 40mA and maximum output voltage is 5.5v which means this transmitter could theoretically produce an output of 220mW. PWM will reduce this obviously. The harmonics should be below this value, but they should probably add a filter. I've transmitting across the Atlantic Ocean at those power levels using a sub-optimal antenna and WSPR (https://en.wikipedia.org/wiki/WSPR_(amateur_radio_software)) encoding.

Comment · 4 years ago

You can also use the Free Internet Chess Server (FICS) as a test bed for chess engines. The interface is telnet-based, so it's pretty easy to experiment with and learn. There's also "zippy" mode in xboard that allows you to connect your engine to FICS .

The commands below will login as a guest and display all of the computer accounts. Use the finger command to find info about an account.

  telnet freechess.org
  g <ENTER>
  who C<ENTER>
  finger ACCOUNT

Sadly, FICS has been dying a slow death for the past 10 years ... but there are plenty of idle CPU accounts waiting for an opponent.

Comment · 5 years ago

Maybe it has to do with the start of solar cycle 25? Expect to see improving HF propagation over the next 3-5 years. It's an exciting time for radio nerds.

Comment · 5 years ago

If you have one of the popular RTL-SDR's you may be able to pick up the HF bands by enabling the direct sampling mode (allows tuning between 500kHz - 28.8MHz).

https://www.rtl-sdr.com/rtl-sdr-blog-v-3-dongles-user-guide/

Comment · 5 years ago

I ran into two problems when trying to switch to a Raspberry Pi 4 8GB as a desktop replacement in mid-2020:

- A noticeably laggy screen update when running urxvt. Any action which caused large amounts of text to scroll on the screen (e.g. a file listing or paging through a man page) would cause a bit of a visual stutter. I was running with with XFT fonts enabled, so maybe that was a contributing factor. Web page scrolling also seemed to lag a bit too if I recall correctly.

- Lack of gamma support for blue light filters such as redshift or f.lux

I'm crossing my fingers there are improvements to these areas in the future.

Comment · 5 years ago