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I built a digital camera that prints photos on thermal paper

https://www.instructables.com/I-Built-a-Thermal-Printer-Camera-That-Prints-Photo/
3•prajjwaluprety•5h ago

Comments

prajjwaluprety•5h ago
I built this camera as a side project with help from a couple friends. It uses an ESP32-CAM for capture and a RISC-V MCU to control the UI and thermal printer. All the hardware is custom — including the PCB and 3D-printed enclosure. It prints real-time, grainy black-and-white photos on 58mm receipt paper.

Full write-up includes technical breakdown, design process, photos, and a build video. Feedback or questions welcome.

Video: https://youtu.be/hxMiumorutI

Thesis Art

https://www.thesisart.de/
1•MakisH•1m ago•0 comments

Show HN: I Made t0ggles – Faster and More Efficient Than Jira and ClickUp

https://t0ggles.com/hn
1•nolimits4web•7m ago•0 comments

Why Apple dumped 2,700 computers in a landfill in 1989

https://hackaday.com/2025/07/21/why-apple-dumped-2700-computers-in-a-landfill-in-1989/
1•geox•9m ago•0 comments

Verify identity documents on the web [video]

https://developer.apple.com/videos/play/wwdc2025/232/
1•mooreds•9m ago•0 comments

AI-generated answers slash traffic, threaten funding for Dutch news outlets

https://nltimes.nl/2025/07/21/ai-generated-answers-slash-traffic-threaten-funding-dutch-news-outlets
2•belter•10m ago•0 comments

Dollar Trap or Empire by Invitation?

https://adamtooze.substack.com/p/chartbook-397-dollar-trap-or-empire
1•mooreds•10m ago•0 comments

Agentic AI Identity Management Approach

https://cloudsecurityalliance.org/blog/2025/03/11/agentic-ai-identity-management-approach
1•mooreds•10m ago•0 comments

Zawinski's Law

https://www.laws-of-software.com/laws/zawinski/
1•Bluestein•11m ago•1 comments

AlphaDec: A readable, lexically sortable time format for humans and AI

https://github.com/firasd/alphadec
1•firasd•11m ago•1 comments

Replit Wiped Production Database, Faked Data to Cover Bugs, SaaStr Founder Says

https://developers.slashdot.org/story/25/07/21/1338204/replit-wiped-production-database-faked-data-to-cover-bugs-saastr-founder-says
2•felineflock•12m ago•1 comments

Speckle contrast optical spectroscopy for cuffless blood pressure estimation

https://opg.optica.org/boe/fulltext.cfm?uri=boe-16-8-3004&id=573500
2•PaulHoule•16m ago•1 comments

The special hell of Bolt, Europe's Uber clone

https://brandur.org/fragments/special-hell-of-bolt-app
2•Metalnem•17m ago•0 comments

In retrospect, DevOps was a bad idea

https://rethinkingsoftware.substack.com/p/in-retrospect-devops-was-a-bad-idea
3•aard•18m ago•0 comments

Daily Grind July 21: AI vs. Media Companies

https://damngrav.substack.com/p/daily-grind-july-21-2025-is-ai-killing
1•bputano•20m ago•1 comments

Book Review: Arguments About Aborigines

https://www.astralcodexten.com/p/book-review-arguments-about-aborigines
1•paulpauper•20m ago•0 comments

Africa's gigantic $80B dam could transform entire continent

https://en.clickpetroleoegas.com.br/maior-que-a-barragem-tres-gargantas-da-china-o-gigantesco-megaprojeto-africano-de-us-80-bilhoes-que-pode-revolucionar-a-energia-e-transformar-um-continente-inteiro/
1•prmph•23m ago•0 comments

Sorcerer's Apprentice Syndrome

https://en.wikipedia.org/wiki/Sorcerer%27s_Apprentice_syndrome
2•tragiclos•26m ago•0 comments

Alaska Airlines Lifts Ground Stop Caused by Software Outage

https://www.wsj.com/business/airlines/alaska-airlines-grounds-its-fleet-due-to-software-outage-d65f9edc
1•perihelions•28m ago•0 comments

Another security snafu hits Microsoft, but don't expect it to stick

https://www.theregister.com/2025/07/21/massive_security_snafu_microsoft/
2•mikece•29m ago•0 comments

Dota 2 Classic

https://dota2classic.com/
2•skibz•29m ago•0 comments

Nanda – The Internet of AI Agents

https://nanda.media.mit.edu/
1•rbanffy•29m ago•0 comments

NOAA's Space Weather Observatory Arrives in Florida for Launch Preparations

https://www.nesdis.noaa.gov/news/noaas-space-weather-observatory-swfo-l1-arrives-florida-final-launch-preparations
1•hnburnsy•29m ago•0 comments

'Corn Sweat' Is Making This Heat Wave Even Worse

https://www.scientificamerican.com/article/humidity-from-corn-sweat-intensifies-extreme-heat-wave-in-midwest-u-s/
2•geephroh•30m ago•0 comments

Robot scans rare library books at 2.5k pages per hour

https://www.popsci.com/technology/book-scanning-robot/
2•bookofjoe•31m ago•1 comments

How could ECDSA be broken through Shor's Algorithm? (2023)

https://crypto.stackexchange.com/questions/103657/how-could-ecdsa-be-broken-with-prime-factorization-through-shors-algorithm
1•lawrenceyan•31m ago•0 comments

OpenAI to open first DC office to push policy goals and show off products

https://www.semafor.com/article/07/21/2025/openai-to-open-first-dc-office
2•mfiguiere•33m ago•0 comments

Show HN: I built a mobile app to help you read in a foreign language with LLMs

https://apps.apple.com/us/app/read-with-ai-contextcat/id6737737343
1•canergly•35m ago•0 comments

Netflix Using Startup Runway AI's Video Tools for Production

https://www.bloomberg.com/news/articles/2025-07-21/netflix-is-using-startup-runway-ai-s-video-tools-for-production
1•mfiguiere•35m ago•0 comments

If durable execution was a simpler architectural decision

https://www.dbos.dev/blog/durable-execution-by-default
2•secondrow•35m ago•1 comments

FCC to eliminate gigabit speed goal and scrap analysis of broadband prices

https://arstechnica.com/tech-policy/2025/07/fcc-to-eliminate-gigabit-speed-goal-and-scrap-analysis-of-broadband-prices/
2•mikece•36m ago•0 comments