https://redbison.dev/blog In-depth guides to the formats, formulas and standards behind RedBison's free browser tools, with worked examples. en Wed, 04 Nov 2026 00:00:00 +0000 https://redbison.dev/redbison-logo.png https://redbison.dev/blog https://redbison.dev/blog/nova-food-classification-ultra-processed-foods https://redbison.dev/blog/nova-food-classification-ultra-processed-foods Tue, 03 Nov 2026 00:00:00 +0000 Health The four NOVA groups, the label markers that make a product ultra-processed, why additives that preserve do not count, what the research shows, and where NOVA falls short. https://redbison.dev/blog/how-accurate-are-redbison-tools https://redbison.dev/blog/how-accurate-are-redbison-tools Mon, 02 Nov 2026 00:00:00 +0000 Development The 7,331 automated tests that check our tools' answers, where the expected values come from, bugs they caught, the limits no test removes, and how to report a mistake. https://redbison.dev/blog/redbison-563-free-tools-whats-new https://redbison.dev/blog/redbison-563-free-tools-whats-new Mon, 02 Nov 2026 00:00:00 +0000 Productivity A tour of all 12 categories and the 143 tools added since October 28: a new AI Tools category, PDF and video editing, statistics and physics calculators, and security utilities. https://redbison.dev/blog/ai-for-civil-engineers-and-qa-engineers-guide https://redbison.dev/blog/ai-for-civil-engineers-and-qa-engineers-guide Sun, 01 Nov 2026 00:00:00 +0000 Engineering Using AI to draft RFI responses, site reports, test cases and bug reports, while keeping calculations, specifications and sign-off with the engineer who is accountable. https://redbison.dev/blog/ai-for-doctors-and-nurses-guide https://redbison.dev/blog/ai-for-doctors-and-nurses-guide Sun, 01 Nov 2026 00:00:00 +0000 Health Where AI assistants save clinicians time, where they must not be trusted, how HIPAA and GDPR apply to pasting patient text, and a 30-day plan for trying it safely. https://redbison.dev/blog/ai-for-front-desk-and-executive-assistants-guide https://redbison.dev/blog/ai-for-front-desk-and-executive-assistants-guide Sun, 01 Nov 2026 00:00:00 +0000 Productivity Prompts for inbox triage, briefings, itineraries, appointment reminders and difficult callers, plus what never to paste into a chatbot and how to check the drafts. https://redbison.dev/blog/ai-for-sales-marketing-insurance-and-restaurants-guide https://redbison.dev/blog/ai-for-sales-marketing-insurance-and-restaurants-guide Sun, 01 Nov 2026 00:00:00 +0000 Business Customer-facing teams can draft emails, briefs, policy explainers and menus with AI. Here is what works, the rules on reviews, email and allergens, and how to review drafts. https://redbison.dev/blog/fine-tuning-datasets-and-llm-evals-guide https://redbison.dev/blog/fine-tuning-datasets-and-llm-evals-guide Sun, 01 Nov 2026 00:00:00 +0000 Tech SFT versus preference tuning, the JSONL formats trainers expect, what makes training data good, and how to hold out an eval set and read metrics like exact match, F1 and ROUGE-L. https://redbison.dev/blog/how-to-build-an-mcp-server https://redbison.dev/blog/how-to-build-an-mcp-server Sun, 01 Nov 2026 00:00:00 +0000 Tech Tools, resources and prompts, a first server with the official TypeScript and Python SDKs, stdio or HTTP, wrapping an API, auth, testing with MCP Inspector and tool design tips. https://redbison.dev/blog/make-your-website-visible-to-ai-guide https://redbison.dev/blog/make-your-website-visible-to-ai-guide Sun, 01 Nov 2026 00:00:00 +0000 Tech How AI crawlers and fetchers find and read pages, robots.txt for AI bots, server-rendered content, structured data, llms.txt, MCP, and what is known versus guesswork. https://redbison.dev/blog/how-to-reduce-llm-token-usage-and-cost https://redbison.dev/blog/how-to-reduce-llm-token-usage-and-cost Sun, 01 Nov 2026 00:00:00 +0000 Tech Where the tokens in an LLM bill come from, how to count them, and the levers that cut cost in order of impact: output length, prompt caching, batch APIs, model choice and trimming what you paste. https://redbison.dev/blog/how-to-set-up-mcp-servers-in-ai-clients https://redbison.dev/blog/how-to-set-up-mcp-servers-in-ai-clients Sun, 01 Nov 2026 00:00:00 +0000 Tech What MCP is, local stdio versus remote servers, the exact config file and format for each AI client, keeping API keys out of shared files, and how to fix a server that will not connect. https://redbison.dev/blog/how-to-share-part-of-a-youtube-video https://redbison.dev/blog/how-to-share-part-of-a-youtube-video Sun, 01 Nov 2026 00:00:00 +0000 Design Start times in links, start and end in embeds, why quality follows the player size, privacy-enhanced mode, YouTube Clips, and what to do when a video will not embed. https://redbison.dev/blog/how-to-write-better-ai-prompts https://redbison.dev/blog/how-to-write-better-ai-prompts Sun, 01 Nov 2026 00:00:00 +0000 Tech The parts of a prompt that change the answer: task, context, audience, examples, output format and rules phrased as what to do. With a before and after rewrite and the vendor advice behind each habit. https://redbison.dev/blog/llm-gpu-memory-and-training-compute-guide https://redbison.dev/blog/llm-gpu-memory-and-training-compute-guide Sun, 01 Nov 2026 00:00:00 +0000 Tech How much VRAM a model needs to serve, fine-tune or train with LoRA and QLoRA, how the KV cache grows with context, and how 6ND and Chinchilla turn into GPU-hours and cost. https://redbison.dev/blog/chief-of-staff-ai-agent-multi-agent-guide https://redbison.dev/blog/chief-of-staff-ai-agent-multi-agent-guide Sun, 01 Nov 2026 00:00:00 +0000 Tech How an orchestrator agent plans, delegates to specialists and asks a person at the right moments: four patterns, when one agent is better, delegation messages, budgets and failure modes. https://redbison.dev/blog/llm-tracing-and-ai-audit-logs-guide https://redbison.dev/blog/llm-tracing-and-ai-audit-logs-guide Sun, 01 Nov 2026 00:00:00 +0000 Tech GenAI semantic conventions, instrumentation libraries, what to capture and what to keep out of traces, agent span trees, and how audit records and EU AI Act logging differ from traces. https://redbison.dev/blog/gitignore-patterns-guide https://redbison.dev/blog/gitignore-patterns-guide Thu, 29 Oct 2026 00:00:00 +0000 Development How git matches .gitignore patterns, why a negation sometimes cannot work, where else ignore rules live, how to stop tracking committed files, and what each stack should and should not ignore. https://redbison.dev/blog/redirects-301-302-307-308-guide https://redbison.dev/blog/redirects-301-302-307-308-guide Thu, 29 Oct 2026 00:00:00 +0000 Development The right redirect code for pages and APIs, what each does for SEO and caching, and working rules for Apache mod_rewrite, Nginx return, Netlify _redirects and vercel.json, plus chains and loops. https://redbison.dev/blog/ada-ramp-slope-and-landing-rules https://redbison.dev/blog/ada-ramp-slope-and-landing-rules Thu, 29 Oct 2026 00:00:00 +0000 Home & DIY What ADA 2010 Section 405 requires for a ramp, the existing-site exceptions, how the residential code differs, and worked layouts for common rises. https://redbison.dev/blog/aes-gcm-vs-cbc-encryption-guide https://redbison.dev/blog/aes-gcm-vs-cbc-encryption-guide Thu, 29 Oct 2026 00:00:00 +0000 Security Block cipher modes, IVs and nonces, why authenticated encryption matters, deriving keys from passwords with PBKDF2, and how openssl enc lays out its output. https://redbison.dev/blog/figlet-ascii-art-text-guide https://redbison.dev/blog/figlet-ascii-art-text-guide Thu, 29 Oct 2026 00:00:00 +0000 Education How FIGlet turns text into banner letters, what is inside an .flf font file, the smushing rules, choosing fonts for code and terminals, and pasting banners without breaking them. https://redbison.dev/blog/attic-insulation-r-value-by-climate-zone https://redbison.dev/blog/attic-insulation-r-value-by-climate-zone Thu, 29 Oct 2026 00:00:00 +0000 Home & DIY ENERGY STAR R-value targets for every IECC climate zone, crediting the insulation you already have, depth per R for cellulose and fiberglass, bag charts and batt layers. https://redbison.dev/blog/stock-average-cost-guide https://redbison.dev/blog/stock-average-cost-guide Thu, 29 Oct 2026 00:00:00 +0000 Finance The weighted average behind your broker's figure, how many shares it takes to average down to a target, what sells do to the average, and how tax cost basis differs. https://redbison.dev/blog/barcode-types-and-check-digits https://redbison.dev/blog/barcode-types-and-check-digits Thu, 29 Oct 2026 00:00:00 +0000 Business Which barcode to use for products, cartons and asset tags, how the GS1 mod-10 check digit works step by step, why you need GS1 numbers to sell at retail, and print size rules. https://redbison.dev/blog/javascript-beautify-and-minify-guide https://redbison.dev/blog/javascript-beautify-and-minify-guide Thu, 29 Oct 2026 00:00:00 +0000 Development How js-beautify and Prettier differ, why automatic semicolon insertion makes naive minifiers dangerous, what TypeScript generics do to a JS formatter, and what real minifiers add. https://redbison.dev/blog/blood-pressure-categories-guide https://redbison.dev/blog/blood-pressure-categories-guide Thu, 29 Oct 2026 00:00:00 +0000 Health What normal, elevated, stage 1 and stage 2 mean, why Europe draws the line at 140/90, how to measure at home properly, and how to average readings like a clinician. https://redbison.dev/blog/blur-vs-pixelate-vs-redact-images https://redbison.dev/blog/blur-vs-pixelate-vs-redact-images Thu, 29 Oct 2026 00:00:00 +0000 Security How blur and pixelation work, why pixelated text can sometimes be recovered, when only a solid box is safe, plus EXIF location data and the other ways screenshots leak information. https://redbison.dev/blog/body-surface-area-formulas-guide https://redbison.dev/blog/body-surface-area-formulas-guide Thu, 29 Oct 2026 00:00:00 +0000 Health Where the BSA equations came from, how mg/m² dosing and cardiac index use them, when the formulas disagree, and why some drugs are no longer dosed by surface area. https://redbison.dev/blog/bolt-circle-coordinates-guide https://redbison.dev/blog/bolt-circle-coordinates-guide Thu, 29 Oct 2026 00:00:00 +0000 Engineering The trigonometry behind bolt hole patterns, angle conventions, chord spacing, partial arcs, measuring wheel bolt patterns and laying out flanges on a manual mill or CNC. https://redbison.dev/blog/color-harmony-palette-guide https://redbison.dev/blog/color-harmony-palette-guide Thu, 29 Oct 2026 00:00:00 +0000 Design Complementary, analogous, triadic and other harmony rules, RGB versus painter wheels, why OKLCH gives even lightness, building a 50-950 scale, and checking contrast before you ship. https://redbison.dev/blog/cron-schedules-across-platforms https://redbison.dev/blog/cron-schedules-across-platforms Thu, 29 Oct 2026 00:00:00 +0000 Development Building a cron schedule that does what you mean: the five fields, the day-of-month OR rule, time zones and daylight saving, and how GitHub, Kubernetes, Quartz and EventBridge read it. https://redbison.dev/blog/css-formatting-minify-sort-guide https://redbison.dev/blog/css-formatting-minify-sort-guide Thu, 29 Oct 2026 00:00:00 +0000 Development Which CSS whitespace is significant, why shorthand properties make alphabetical sorting risky, the value rewrites that break minified CSS, and how to format SCSS and Less. https://redbison.dev/blog/density-mass-volume-guide https://redbison.dev/blog/density-mass-volume-guide Thu, 29 Oct 2026 00:00:00 +0000 Science How to calculate and convert density, what specific gravity means, why water is 1 g/cm³, how temperature changes it, and how to measure an irregular object by weighing it in water. https://redbison.dev/blog/depth-of-field-and-hyperfocal-distance-guide https://redbison.dev/blog/depth-of-field-and-hyperfocal-distance-guide Thu, 29 Oct 2026 00:00:00 +0000 Design What sets the near and far limits of sharpness, where the circle of confusion comes from, why sensor size changes depth of field, and how to use the hyperfocal distance for landscapes. https://redbison.dev/blog/dipole-antenna-length-468-formula https://redbison.dev/blog/dipole-antenna-length-468-formula Thu, 29 Oct 2026 00:00:00 +0000 Engineering Free-space wavelength, the end effect that shortens a real dipole by about 5%, quarter-wave and 5/8-wave verticals, why loops are longer, and velocity factor for coax stubs. https://redbison.dev/blog/dividend-yield-drip-guide https://redbison.dev/blog/dividend-yield-drip-guide Thu, 29 Oct 2026 00:00:00 +0000 Finance How yield is calculated, what a dividend really pays per quarter, how reinvesting compounds share count, and why yield on cost and dividend growth matter more than a high headline yield. https://redbison.dev/blog/vo2-max-estimation-guide https://redbison.dev/blog/vo2-max-estimation-guide Thu, 29 Oct 2026 00:00:00 +0000 Health What VO2 max measures, how the Cooper run, Rockport walk, heart rate ratio and race-based VDOT estimate it, how accurate each is, and what the FRIEND norms say. https://redbison.dev/blog/ev-vs-gas-cost-comparison https://redbison.dev/blog/ev-vs-gas-cost-comparison Thu, 29 Oct 2026 00:00:00 +0000 Finance Cost per mile for electric and gasoline cars, how home versus public charging changes the answer, how long a higher EV price takes to pay back, and grid CO2 by region. https://redbison.dev/blog/exponent-rules-negative-fractional-exponents https://redbison.dev/blog/exponent-rules-negative-fractional-exponents Thu, 29 Oct 2026 00:00:00 +0000 Math Why b⁰ = 1 and b⁻ⁿ = 1/bⁿ, how fractional exponents become roots, the negative-base trap in software, 0⁰, and how to count the digits of enormous powers. https://redbison.dev/blog/exposure-value-and-exposure-triangle-guide https://redbison.dev/blog/exposure-value-and-exposure-triangle-guide Thu, 29 Oct 2026 00:00:00 +0000 Design How aperture, shutter speed and ISO trade against each other in stops, what an EV number means, the scene brightness table behind sunny 16, and how to find an equivalent exposure quickly. https://redbison.dev/blog/field-of-view-and-crop-factor-guide https://redbison.dev/blog/field-of-view-and-crop-factor-guide Thu, 29 Oct 2026 00:00:00 +0000 Design Angle of view from focal length and sensor size, horizontal versus diagonal figures, equivalent focal lengths on APS-C and Micro Four Thirds, and how wide a scene a lens covers at a distance. https://redbison.dev/blog/free-fall-air-resistance-guide https://redbison.dev/blog/free-fall-air-resistance-guide Thu, 29 Oct 2026 00:00:00 +0000 Science The vacuum formulas, what drag does to them, how terminal velocity depends on mass, area and air density, and the exact tanh solution for a falling object, with worked numbers. https://redbison.dev/blog/curl-to-code-guide https://redbison.dev/blog/curl-to-code-guide Thu, 29 Oct 2026 00:00:00 +0000 Development The curl options behind every API example, the defaults that differ between curl and fetch, requests, Axios and Go, and how to turn a browser Copy as cURL into clean code. https://redbison.dev/blog/docker-run-to-compose-guide https://redbison.dev/blog/docker-run-to-compose-guide Thu, 29 Oct 2026 00:00:00 +0000 Development How docker run flags become Compose keys, named volumes versus bind mounts, networks and service DNS, GPUs, health checks, the flags with no equivalent, the obsolete version key, and going back again. https://redbison.dev/blog/fuel-injector-sizing-bsfc-duty-cycle https://redbison.dev/blog/fuel-injector-sizing-bsfc-duty-cycle Thu, 29 Oct 2026 00:00:00 +0000 Engineering The injector sizing formula step by step, sensible BSFC values for naturally aspirated, blower and turbo engines, E85 and methanol, lb/hr to cc/min, and the square-root pressure law. https://redbison.dev/blog/grass-seed-rates-and-sod-ordering https://redbison.dev/blog/grass-seed-rates-and-sod-ordering Thu, 29 Oct 2026 00:00:00 +0000 Home & DIY Seeding rates by species for new lawns and overseeding, why bluegrass and tall fescue differ tenfold, unit conversions, and how many pieces and pallets of sod to order. https://redbison.dev/blog/heat-pump-vs-gas-furnace-running-costs https://redbison.dev/blog/heat-pump-vs-gas-furnace-running-costs Thu, 29 Oct 2026 00:00:00 +0000 Finance Cost per kWh of heat for gas, oil, propane and heat pumps, the break-even electricity price, what COP and HSPF2 mean, and why backup heat matters. https://redbison.dev/blog/heloc-home-equity-guide https://redbison.dev/blog/heloc-home-equity-guide Thu, 29 Oct 2026 00:00:00 +0000 Finance How lenders use combined loan-to-value to size a credit line, why the payment jumps when the draw period ends, and how a HELOC compares with a fixed home equity loan. https://redbison.dev/blog/hmac-signatures-webhooks-explained https://redbison.dev/blog/hmac-signatures-webhooks-explained Thu, 29 Oct 2026 00:00:00 +0000 Security What HMAC adds to a hash, how RFC 2104 builds it, how the big webhook providers sign requests, and the raw-body and timing mistakes that break verification.