Jason Pepas

LearningRxSwift. A space to doodle as I learn RxSwift

LTSpice-parts. Parts for LTSpice commonly used by electronics hobbyists (with usage instructions).

app-notes. Links to application notes published by electronics manufacturers.

Electronics. A central place to organize and publish all of my hobbyist electronics knowledge and projects.

leopard.sh. Package managers for PowerPC Macs running OS X Leopard (10.5) and Tiger (10.4), written in Bash 😱

pogoplug_mobile_uboot_installer. A script which installs uboot onto a Pogoplug Mobile or Pogoplug Series 4 (allowing you to boot Linux from USB or SD card).

lc3as.py. An assembler for the LC-3 fictitious computer.

awesome-swift-arm. Everything I know about running Swift on ARM (Raspberry Pi, BeagleBone, etc)

GlitchyTable. An exploration of improving UITableView scrolling performance by using asynchronous cell population

atmega-gpib. An ATmega-based GPIB-to-USB adapter board.

pogoplug-v4-bodhi-rootfs-debian. bodhi's Debian rootfs, prepared specifically for Pogoplug V4 devices (Pogoplug Mobile and Pogoplug Series 4).

hp-03458-66509-clone. A clone of the LTZ1000 reference board from the HP 3458A 8.5-digit multimeter

GridNotes. A piano with a grid layout (iOS)

DualLM317BenchSupply. A simple adjustable voltage, current limited bench power supply using two LM317 regulators.

ADC-reference-library-2009-july. Apple's ADC Reference Library from July 2009 (for OS X Leopard)

pogoplug_static_binaries. Statically-linked binaries compiled for the stock busybox-based Linux distribution which comes with Pogoplug v4 devices (Pogoplug Mobile and Pogoplug Series 4).

px-ref. An LTZ1000-based 7V reference (circuit by Andreas)

crenshaw-lets-build-a-compiler. A C & x86 version of the "Let's Build a Compiler" by Jack Crenshaw

SICPChapterBooklets. SICP, split into chapters, impositioned into booklets (PDF format).

dr-frank-ltz1000. Dr. Frank's LTZ1000 reference

hexon38. A custom 38-key keyboard

6N137-TTL-Serial-Optoisolator. A board for isolating a TTL serial RX / TX pair using 6N137 (8-pin) optoisolators.

ClimbingOutOfTheTarPit. Resources for becoming a better programmer.

hexify.c. Convert binary data (unsigned char*) into a hexidecimal string

swift-build-scripts. Bash scripts for building Swift on Linux/ARM

ohmyppc. Build scripts for installing software on PowerPC Macs running OS X Tiger and Leopard.

amd-pic-linux. Notes on install Linux on the AMD Personal Internet Communicator (PIC)

Deadband. An Arduino library to stabilize noisy analog inputs by giving them deadband (sometimes called hysteresis).

bodhi-kirkwood-kernel-mirror. A mirror of bodhi's kirkwood linux kernel

ProgrammableLM317. A TTL-serial programmable LM317 voltage voltage supply circuit board design.

prog-cc-100mA. A programmable 100mA current source

ltz1000-info. A collection of what I've learned about the LTZ1000

cocoa-appkit-tiger-demos. Cocoa/AppKit demo projects for OS X 10.4 Tiger/PowerPC in Xcode 2.5

4N35-TTL-Serial-Optoisolator. A board for isolating a TTL serial RX / TX pair using 4N35 optoisolators.

RxViewLifeCycleDemultiplexer. An RxSwift wrapper around ViewLifeCycleDemultiplexer (see https://github.com/pepaslabs/ViewLifeCycleDemultiplexer)

janet-lzo. Janet bindings for the LZO real-time compression library.

TO-220_breakout. A TO-220 breakout board, with heatsink.

elk-scheme-mirror. This is a github mirror of Elk Scheme 3.99.8. http://sam.zoy.org/elk/

ViewLifeCycleDemultiplexer. Break up UIViewController's view lifecycle methods into more specific cases.

abx-tayda. A relay board for performing blind A/B testing of two audio sources.

yagolisp. Yet another Lisp-like interpreter, written in Golang 😃

rhash_md5.c. Aleksey Kravchenko's MD5 implementation (see http://rhash.anz.ru/)

libint10h_fonts. The int10h.org bitmap font collection as a library of C structs.

socks5-ios. SOCKS server for iOS. Handy for defeating tethering speed limits, among other uses.

phosphor-uikit. Xcode asset catalog generator for Swift/UIKit using Phosphor icons

itty. The itty-bitty Python web framework.

NegativeRail. An ICL7660 based negative rail daughter board.

lc-3b-tools. A disassembler for the LC-3b (Little Computer 3b)

basic-lm399. A very basic LM399 voltage reference board design.

1590b-isothermal. A board which adheres to the bottom of a Hammond 1590B and regulates its temperature.

Cocoa-Samples. Simple macOS Cocoa samples

evhdemo. Swift

gpib-spy. A GPIB pass-through board with connectors for logic analyzers.

mserve.py. A single-file Python media server

retainn. a spaced-repetition flashcard system (work-in-progress)

breadboard-helpers. A few breakout boards of commonly needed circuits when creating breadboard prototypes.

go. The Go programming language

lets-build. Let's build some things!

austin-moto-routes. Some roads near Austin, TX which are fun for motorcycle riding.