These are some of the projects I've started, with an eye on minimizing complexity of the whole tech stack, many of which are maintained by a community of like-minded individuals, DM me at cnlohr for an invite to our discord server:

Single-file <IMG SRC=https://github.com/user-attachments/assets/1dd32295-869d-4d0f-8045-6e53bf7e916c> header libraries:

• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cntools/rawdraw&6>rawdraw - graphics (Opengl/Raw) and input for Android, WASM, Windows, Linux without the bloat
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/mini-rv32ima&6>mini-rv32ima - RISC-V emulator in about 1,000 lines of code. Able to boot Linux
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/sfhip&6>sfhip - Extremely memory tight immediate mode IP library for IPv4, TCP/IP, UDP, ARP, and DHCP
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/fix32_fft&6>fix32_fft - modern C fixed-point FFT library geared for 32-bit systems, like ARM and RISC-V
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/vpxcoding&6>vpxcoding - VPX arithmatic coding library for bit compression with a tiny code/memory footprint
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/cnrbtree&7>cnrbtree - Basically a c++ <map> or Dictionary in C, as a single file header
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/heatshrink-sfh&6>heatshrink-sfh - Extremely simple implemenation of heatshrink for decompressing data in <600 bytes
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/rtgz-tinf-util&6>rtgz-tinf-util - Very small port of tinfl, a gzip decompressor in a header only library
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/miniosc&6>miniosc - Minimal OSC (Open Sound Control) library for C with support for platform-independent sockets
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/tsopenxr&6>tsopenxr - Everything needed to build OpenXR VR apps for PC or Quest in one header file
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/csgp4&6>csgp4 - single-precision, SGP4 orbital mechanis for shaders or microcontrollers

Other libraries and tools:

• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/ch32fun&6>ch32fun - ch32v microcontroller build system, targeting compactness, development speed and openness
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/rawdrawandroid&6>rawdrawandroid - build android apps in c, without any java, with 1 second development cycles
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/h264fun&6>h264fun - Raw PCM H.264 video encoding streams with support for RTMP and RTSP
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/lamenet&6>lamenet - bad network simulator, to simulate a bad network connection
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/coefficient_decompose_calculator&6>coefficient decompose calculator - Compute constant multiplies decomposed to optimal/minimal bit shifts
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/microclockoptimizer&6>microclockoptimizer - clock tree calculator / solver for computing microcontroller clock trees
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cntools/cnping&6>cnping - monitor live network conditions, gain insights about poor network performance in realtime
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/colorchord&6>colorchord - realtime chromatic sound-to-color conversion
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/minimdnsd&6>minimdnsd - small, ultra low overhead Linux MDNS server
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/nosdk8266&6>nosdk8266 - Extremely lightweight ESP8266 SDK
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/pi_tpi&6>pi_tpi - AVR TPI programming interface for Raspberry Pi GPIO
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/x32-ws2812-usbhs-breakout&6>x32-ws2812-usbhs-breakout - 32-simultaneous-output WS2812B driver using USB HS
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/cilbox&6>cilbox - C# CIL emulator/scripting sandbox for unity, focused on speed and simplicity

Various demos:

• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/channel3&6>channel3 - NTSC/PAL VHF video transmission from the ESP8266 via IO pins
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/espusb&6>espusb - use the esp8266 as a USB device, by bit-banging GPIOs to enumerate as a low-speed USB device
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/rv003usb&6>rv003usb - Bit bang USB low-speed on the ch32v003 (fully featured)
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/ch32v003_3digit_lcd_usb&6>ch32v003_3digit_lcd_usb - bit banged 3-digit LCD driver for the ch32v003
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/oledscope&6>oledscope - using OLED displays as 15kPPS vector scope
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/ch32v00x_ntsc&6>ch32v00x_ntsc - NTSC composite output on ch32v003/006, may not work on digital TVs
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/lolra&6>lolra - Broadcast 900MHz LoRA messages on microcontrollers without using radios over a kilometer
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/airspydump&6>airspydump - Dumping raw IQ samples from AirSpy SDRs for narrow time analysis
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/badderapple&6>badderapple - Bad Apple in 62.5kB
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/rtl8153_userspace&6>rtl8153_userspace - RTL8153, GbE to USB via userspace from Linux or Android for raw packet access
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/cnixxi&6>cnixxi - use a ch32v003 as a high-voltage flyback and control a nixie tube, with PWM digitally
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/esp32s2-cookbook&6>esp32s2-cookbook - esp32-s2 experiments + tools and non-IDF sdk
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/ethertiny&6>ethertiny - bit bang ethernet Base 10-T on an attiny85
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/ch32v00x_ntsc&6>ch32v00x_ntsc - software bit bang NTSC video with the ch32v003 or 006
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/starcounter&6>starcounter - example using olive, ffmpeg and github APIs to animate user's stargazers over time

Documentation:

• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/cnlohr_tricks&6>cnlohr_tricks - tricks&tricks I've learned over the years about electronics, programming and engineering
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/cntools&6>cntools - my incomplete library for various header-only and other libraries. (Mostly uncategorized)
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/cnhardware&6>cnhardware - kicad footprints and all my random hardware projects
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/halnoslides&6>halnoslides - my talk on how to write a embedded development environment from scratch
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/shadertrixx&6>shadertrixx - lots of discussion on writing shaders for unity
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/lolra_talk&6>Radios are just Microcontrollers in disguise - Hackaday talk on TX and RX RF signals without radios
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/assembly-notes&6>CNLohr's Assembly Notes - My assembly notes (also from my 2022 Hackaday talk)

VR/Graphics

• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/voxeltastic&6>voxeltastic - render 3D volumes with path tracing in-browser, or in vr!
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/cnovr&6>cnovr - an OpenVR playground with hot-compile-and-reload code
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/vrc-rv32ima&6>vrc-rv32ima - a HLSL implementation of mini-rv32ima, to emulate processors in shaders on VRChat
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/openvr_overlay_model&6>openvr_overlay_model - openvr stereo overlay example
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/openvr-screengrab&6>openvr-screengrab - minimal example to create DirectX contexts in pure C and grab SteamVR screengrabs
• <IMG SRC=http://cnvr.io/d/ghsai.cgi?cnlohr/slapsplat&6>slapsplat - VRChat-friendly Gaussian Splat renderer for VR, using ordinal sorting

How to support

While I cannot accept donations, favors or work at the moment, your money may go well with the following individuals:

• MonteMonte for their continued work on ch32fun and supporting projects Kofi Link
• iakat for their work on adsb.lol, and open ADSB platform. Github Sponsorship
• Dooly123 for their continued work on Basis, an open source VR social framework

Sandbox testing:

<IMG SRC=http://cnvr.io/d/ghsai.cgi?now> <IMG SRC=https://github.com/user-attachments/assets/03e3fbc9-2ce5-46b0-afec-f0213627eaf4>