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endolith

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Electronics/Firmware/DSP engineer. (See also GitHub Gist.)

330 followers ·54 following

New York, NY
12:31(UTC -05:00)
http://gist.github.com/endolith
https://stackoverflow.com/users/125507/endolith
https://dsp.stackexchange.com/users/29/endolith
https://electronics.stackexchange.com/users/142/endolith

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endolith /generate.py

Last activeMay 20, 2025 21:53— forked fromgordonjcp/generate.py

	#!/usr/bin/python

	# Copyright (c) 2016, Gordon JC Pearce <gordon@gjcp.net>
	# All rights reserved.
	#
	# Redistribution and use in source and binary forms, with or without
	# modification, are permitted provided that the following conditions are met:
	#
	# 1. Redistributions of source code must retain the above copyright notice,
	# this list of conditions and the following disclaimer.

endolith /.gitignore

Last activeSeptember 20, 2024 00:21

I tried to plot AGI on the Chatbot Arena Elo scale by comparing to "both bad" and "tie" votes

	*.json
	*checkpoint.ipynb

endolith /README.md

Last activeJune 5, 2023 19:48

Turn BOINC on or off depending on how warm the room is

Written by ChatGPT and me.

I also had to enable temperhum as a non-root user and set up a cron job to call this script every once in a while.

endolith /README.md

Last activeAugust 28, 2025 16:20

Qalculate keyboard shortcut with AutoHotkey

Qalculate Hotkey for inline calculations

Finally Qalculate has been ported to Windows. Now we can do unit-aware calculations inline, in any document, with AutoHotkey, similar toMonster.ahk but with units.

Instructions:

InstallQalculate
InstallAutoHotkey
Add qalc.exe to your PATH. I useRapid Environment Editor for this.
Run qalc.ahk

endolith /whisper_transcribe.py

CreatedMarch 27, 2023 02:33

Transcribe a long audio recording using OpenAI Whisper API

	"""
	Break up a long recording to fit within the Whisper API's limits, with some
	overlap, so no words are missed, and then feed to OpenAI Whisper API to
	transcribe it to .txt file. Written by endolith and ChatGPT-4.
	"""

	importopenai
	importmath
	importos
	importsubprocess

endolith /README.md

Last activeJanuary 18, 2025 05:30

Cyclic noise from filtering white noise in Python

This generates cyclic/repeating/perfect loop noise by low-pass filteringwhite noise in a cyclic way. Useful for "random" but looping animations, etc.:

This one loops in both space and time, for instance:

Simplex noise typically has a more trapezoidal value distribution:

lmas/opensimplex#18 (comment)

endolith /db_to_gpx.py

CreatedSeptember 9, 2022 01:08

Maprika sqlite database to GPX track converter

	"""
	WrittenbyGPT3fromthisEnglishprompt (withonetweaktotheprompt,toget
	thetimestampparametertonoterrorout,andPEP8fixes):

	----

	1.Openasqlitedatabasewithanamelike`2022-07-17 17.48.19.db`or
	`2021-04-11 08.44.16.db`
	2.Insideisatablecalled`locations`,withheaders [LOCTYPEINTEGER,
	TIMESTAMPBIGINT,LATITUDEREAL,LONGITUDEREAL,ALTITUDEREAL,ACCURACY

endolith /estimated_variance_of_estimated_probability.py

Last activeDecember 13, 2023 18:20

Confirm the formula for estimating the variance of an estimated probability. (Trying to understand error bars forhttps://github.com/endolith/elsim/issues/13)

	"""
	Confirm the formula for estimating the variance of an estimated probability.

	Created on Fri May 27 11:06:43 2022
	"""
	importnumpyasnp


	deffunc(x):
	"""

endolith /README.md

Last activeFebruary 6, 2024 19:13

Single neuron experiments

My first keras experiments:

simplest.py — A single neuron with no activation function and no bias (so just input→weight→output, can learn y=mx functions only). Show the function for a few random weights. (Doesn't learn anything.)
linear with bias.py — A single neuron with no activation function butwith bias (so it can learn y=mx+b functions, such as relationship between Celsius and Fahrenheit).
single_neuron_buffer.py — A single neuron with sigmoid activation and no bias, trained to learn a digital logic buffer.
single_neuron_inverter.py — A single neuron with sigmoid activation and no bias, trained to learn an inverting analog amplifier.

endolith /FIR_filter_NN.py

Last activeMay 13, 2025 16:20

Neural network learning FIR filter

	"""
	Train a neural network to learn an FIR filter.

	Created on Fri Aug 3 15:00:40 2018
	"""
	fromtensorflow.keras.modelsimportSequential
	fromtensorflow.keras.layersimportDense
	fromtensorflow.keras.callbacksimportCallback
	importnumpyasnp
	fromscipyimportsignal

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endolith

Qalculate Hotkey for inline calculations