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Jason Pepas cellularmitosis

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cellularmitosis / README.md
Last active Oct 19, 2022
Arduino math timings (Pro Micro / ATMega32u4 5V 16MHz)
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Blog 2022/10/18

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Arduino math timings (Pro Micro / ATMega32u4 5V 16MHz)

I threw together a quick series of Arduino sketches to measure the relative performance of the different math operations across different data types.

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cellularmitosis / README.md
Last active Oct 1, 2022
"EZOFF": Easy offsets and keepouts for Marlin firmware
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cellularmitosis / README.md
Last active Oct 1, 2022
Creality Ender 3 End-stop Capacitors (C5, C6, C7)
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Blog 2022/9/18

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Creality Ender 3 End-stop Capacitors (C5, C6, C7)

In late 2018, the Creality Ender 3 shipped with the Melzi 1.1.3 board:

@cellularmitosis
cellularmitosis / README.md
Last active Sep 19, 2022
Arduino LCD display for HP 34401A
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cellularmitosis / README.md
Last active Aug 9, 2022
Linear power supply schematics
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cellularmitosis / README.md
Last active Jul 26, 2022
dirqueue: a filesystem-based job processing system
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cellularmitosis / README.md
Last active Jul 23, 2022
Temperature regulation circuit prototyping (Vref ovens)
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Blog 2018/7/8 (retroactively blogged on 2022/7/23)

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Temperature regulation circuit prototyping (Vref ovens)

I prototyped out a couple of variations of temperature regulation circuits for a small voltage reference oven,

@cellularmitosis
cellularmitosis / README.md
Last active Sep 19, 2022
Simple Arduino-based Li-ion battery capacity tester
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Blog 2022/7/21

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Simple Arduino-based Li-ion battery capacity tester

Initial Arduino sketch for a simple Li-ion capacity logger built with junk-bin parts.

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cellularmitosis / README.md
Last active Apr 8, 2022
Timeline of random tech
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@cellularmitosis
cellularmitosis / README.md
Last active Mar 22, 2022
leopard.sh: a package manager for OS X Leopard (10.5) PowerPC, written in Bash
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Blog 2022/1/20

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leopard.sh: a package manager for OS X Leopard (10.5) PowerPC, written in Bash

The two existing options for building open source software on Tiger and Leopard are Tigerbrew and Mac Ports, but I've been frustrated by how opaque their formulas can be (particularly when trying to diagnose and fix a failing build).