codes

Some ungrouped code snippets I wrote which might be helpful or reusable.

For description, please open the file/subdirectory.

I know that "code" is an uncountable noun. It just works, doesn't it?

Things Particularlly Useful/Noteworthy

Physics/Mathematics

• wave_interference.py: Plot 2D wave interference pattern.
• wnlfit.py: Weighted nonlinear least squares fitting.
• expfit_guess.py: Guess the parameters of an exponential fit.
• differential_watt_meter: A differential watt meter using Raspberry Pi Pico.
• discharger: Discharge a battery to a set voltage using Raspberry Pi Pico.
• init.m: My Mathematica startup script.
• prime2.c: List prime numbers up to a given number.
• prime3.c, prime4.c, prime5.c: List prime numbers in a given range with the Sieve of Eratosthenes.

General Computing

• mkf: Like xargs but reads stdin and converts to a file before executing a command.
• manage_hosts.py: Database of IP addresses and MAC addresses in a network.
• mactk: A MAC address toolkit.
• autoresume.py: Automatically resume processes after a reboot.
• parsereports.py: Parse DMARC aggregate reports and TLSRPT reports.
• pccommon.sty: My LaTeX preamble.
• interp.py: Convert Chinese characters to Pinyin for ASCII dumb terminals.
• uprec.c: Record system uptime.
• YUSS-detach: Defeat student control software.

Multimedia Processing

• 8bit.c: Convert any audio (FFmpeg) to raw 8-bit PCM.
• debook.sh: Crop two-sided scanned book pages into single pages.

GIS

• MarsCoord.nb: The "Mars Coordinate System" implemented in Mathematica.

Amateur Radio

• wwvb_simul: Generate WWVB time code on Raspberry Pi Pico.
• Keyer.ino: A Morse code iambic keyer on ATTiny85.