Computer History

Bring a whiteboard or a laptop or a piece of paper. We will be solving 1 easy and 1 medium problem on LeetCode. We have no rules for being late or leaving early, you can be late and start from the second problem or do the first one and leave. The main idea is to work together on it, share thoughts and discuss a solution. For those who don't like the time pressure during the session, I will be posting problems in the comments for the session 1 day in advance.

As part of the [Arduino Days 2026](https://days.arduino.cc/about) world-wide celebration, we will be meeting in-person and online to talk about all things related to the Arduino platform. For the best possible experience, please attend in person and bring a laptop with a USB port, and your project or project ideas. We will have several Arduino computers available to borrow and experiment with during the meeting, including the new [Arduino Uno Q](https://www.arduino.cc/product-uno-q). Beginners and Experts are welcome to attend and participate! A rough agenda for the meeting shall be: \* **Workshop and Live Demo:** A short interactive hands-on introduction to Arduino. For online participants, we'll use [Tinkercad](https://www.tinkercad.com/). For in-person participants, we'll have a few Arduinos available to experiment with. Depending on the experience and interest of the participants, we might skip this introduction. \* **Ask the Arduino Expert:** Get Arduino project help from the experts. Got a problem with a project you're working on, or need advice on getting started? Get in-person and online help to get you going! We'll go around the room and see what each person needs help with. \* **Show-and-Tell:** Got an Arduino or other digital electronics project to share? Talk about it informally and share what you've learned! It can be as simple as a Blink project or as complex as an Edge AI application. You do not need to be an expert in the subject matter. \* **Open Day:** Work on your projects during the meeting. You can listen, share, or get going on your projects, whatever you decide! Bring your soldering iron and tools. \* **Build a Project Team**: Looking for project help on a longer-term basis? Share your project and find willing participants to help you finish it!

This is the monthly design status and update meeting. Participation is both in person and online. Members of Austin Physics for Fun are now involved in the effort. -- https://www.meetup.com/physics-1/ The meeting will be held at a private makerspace, Diogenes. It is located in the same building as the adult club Colette Austin. The door is at the left end of the building, Suite C. Go to the back of the first floor workspace and head upstairs. If you have questions please feel free to submit them in the comments below or send them to me directly. Zoom meeting details will be posted about a half hour before the meeting begins. HABEX - High Altitude Balloon Experiments The reference to experiments is two-fold. The first is in regard to the actual balloon construction and flight processes. The second is a reference to the payload and what it does during the flight (e.g. images, environmental measurements, etc.). To be clear, there will be two design processes going on in parallel, the balloon proper and the payload. This initial flight is really focusing on the balloon to get that process pinned down and clearly defined. The initial payload should be simple (e.g. digital camera taking pictures). One of the primary design considerations will be the use of CanSat techniques in the design and construction process. We may need to build a technology demonstrator for this (i.e. dummy payload) before the actual flight process. Design Process: Design/Buy > Assemble > Test > Loop (Will it fly?) > Flight Plan Meeting Sequence: Pilot - Initial meeting (possibly two) to gauge interest and get first round of participants. Design - Group responsible for the first four stages of the Design Process. - Multiple meetings. Pre-Flight - Review process to date and verify readiness - Set the date of launch - Possibly two meetings Launch - Two teams (Launch and Recovery) Clean up - Launch team cleans up launch site and transitions to tracking and telemetry Recovery - Recovery team (possibly several groups) chases the balloon and tries to stay ahead of it. Post-Flight - Review, analysis, and release of flight report (including experimental results if any). Flight Plan: * Pre-Flight * Schedule * Assembly * Launch * Tracking * Recovery Constraints: * COVID 19 * Budget * Resources/Tools/Facilities * Legal (e.g. FAA rules about weight and number of modules) * People * Transportation * Review/Release Results

Join us over food and drinks to discuss the book, “Double Entry: How the Merchants of Venice Created Modern Finance.” Description of book: Filled with colorful characters and history, Double Entry takes us from the ancient origins of accounting in Mesopotamia to the frontiers of modern finance. At the heart of the story is double-entry bookkeeping: the first system that allowed merchants to actually measure the worth of their businesses. Luca Pacioli―monk, mathematician, alchemist, and friend of Leonardo da Vinci―incorporated Arabic mathematics to formulate a system that could work across all trades and nations. As Jane Gleeson-White reveals, double-entry accounting was nothing short of revolutionary: it fueled the Renaissance, enabled capitalism to flourish, and created the global economy. John Maynard Keynes would use it to calculate GDP, the measure of a nation’s wealth. Yet double-entry accounting has had its failures. With the costs of sudden corporate collapses such as Enron and Lehman Brothers, and its disregard of environmental and human costs, the time may have come to re-create it for the future. Look for the group with lights and a sign.

More specifics will be added as the event date approaches. Current Arduino details available at -- [https://days.arduino.cc/about](https://days.arduino.cc/about) Austin, TX specific activities are open to all makes and models of single board computers. Please let us know if you have a presentation or activity that you would like to present.

Join with us for a peaceful and uplifting gathering and experience the soothing spiritual sound vibration of Kirtan meditation. We'll finish off the evening with a guided deep relaxation. This free event is open to all and offers an opportunity to explore a meditative state through the singing of sacred mantras. This evening will allow you to participate as much or as little as you’d like, whether you prefer to chant along, listen, or simply absorb the peaceful yoga sound. No previous experience is necessary. Just bring an open heart. Feel free to bring a friend! We look forward to sharing this special evening with you.

My favorite band and my favorite venue! Super excited! I will post the “official” details below, but for us, this could be our brand new meetup group’s first meet and greet! I will get there early to save us a table or a spot to gather, but there are food trucks and bars and chaos and fun to be had! Super excited to meet and mingle with you all! Looks like we have an amazing assortment of fantastic folks! Dysfunkshun Junkshun is one of the best show bands in the southwest. Their unique blend of high energy R&B, current top 40 favorites, 70's funk, Motown, and classic rock make them a favorite dance party band. Great music, great entertainment, and a great time is a guarantee. *94% Come out, socialize, dance, and have fun! The Fieldhouse has a large stage with an artificial grass area for dancing in front of the stage. High heels are not recommended for this venue. Large tents on both sides of the stage have plenty of picnic tables. There is an outside bar with a light food menu and 5 good food trailers. Feel free to bring your own folding chair. he rielanouse nas a large stage with an "rial grass area for dancing in fror • High heels are Forecommen L *93% venue. Large tents on both sides of the stage have plenty of picnic tables. There is an outside bar with a light food menu and 5 good food trailers. Feel free to bring your own folding chair. The Fieldhouse is the outdoor area of The Crossover Sports complex. Access to Crossover is from northbound 183 access road or from Scottsdale Drive. If northbound on 183 access road, turn right just after the Toyota car dealership.

Christians in Tech is a community at the intersection of faith and technology. Our meetups are designed to spark meaningful conversations, promote knowledge sharing, and encourage growth—both in your career and your spiritual walk with God. Whether you're an experienced professional or just starting your tech journey, CIT welcomes you. Our Website [https://linktr.ee/citcbus](https://linktr.ee/citcbus) Sponsors and Partners * Improving (Venue Sponsor) * Bethel World Prayer Center (Fiscal Sponsor) * Fruits & Roots (Coffee Partner)

Want to be a speaker? submit your talk to our Call for Presenters!!! https://sessionize.com/azure-cbus-2026/

The Humanist Monthly Program is our longest running event and still a community favorite. In the old days it used to be called "Going to HCCO" and we still like to think of it as our flagship event. We will be hearing from Becca Powell, Director of Advocacy and Outreach at Unchained At Last, an organization whose mission is dedication to ending forced and child marriage in the United States through direct services and systems change. Unchained At Last's mission clearly meshes and addresses several of our Humanist Ten Commitments. Becca will educate us about an issue many of us may not be familiar with--but should be. Food and drinks will be provided at the event. Feel free to show up a little bit early to hang out and talk. Going forward our meetings will be hybrid. You can meet us in-person or attend online Join Zoom Meeting [https://us02web.zoom.us/j/87836564953?pwd=4Mi57ElZkDIFlb1fnlNwOJ0NiOK4tP.1](https://us02web.zoom.us/j/87836564953?pwd=4Mi57ElZkDIFlb1fnlNwOJ0NiOK4tP.1) Meeting ID: 878 3656 4953 Passcode: 760812 One tap mobile +19292056099,,87836564953#,,,,\*760812# US (New York) +13017158592,,87836564953#,,,,\*760812# US (Washington DC) The formal presentation will start at noon

Central Ohio Radio Enthusiasts—CORE—is an informal community for anyone enthusiastic or curious about radio—whether you're new to radio and want to learn or you've been tinkering for years and want to share. Ham radio operators, GMRS users, Meshtastic fans, software-defined radio nerds, makers, and technical and non-technical folks are all welcome. No experience required or expected. This month we have **WiFi HaLow: Introduction and Practical Use** with **Alex Barbur**. Details are are [core.radio](https://core.radio).

**First meetup of the Columbus AI Engineering group.** We’ll kick things off with a practical, beginner-friendly discussion on: **How LLMs like ChatGPT actually work — and how to build real applications with them.** We’ll cover: * what’s actually happening under the hood (at a high level) * why LLMs behave the way they do (hallucinations, prompt sensitivity, etc.) * how people are building real systems with them today * where things break in practice This will be a **short, informal talk (\~15–20 min)** followed by open discussion and Q&A. Whether you’re an engineer, builder, or just curious about how modern AI systems work, you’re welcome to join. No slides, no fluff — just real conversation about real systems. We’ll hang out afterward and get to know each other.

**Improving Office in Franklinton** Physical location: Improving Office 330 Rush Alley Suite #150 Columbus, OH 43215 Schedule: 6:00 p.m.: Socialize, eat, and drink. Improving will be providing pizza and beverages. 6:30 to 8:00 pm. Main meeting and presentation(s). Topic: Type Annotations with John Cassidy We meet on the last Monday of each Month. Presentations are given by members and friends of this group. If you would like to do a presentation (small or large) on a python topic, please contact Central OH Python at centralohpython@gmail.com

Bring your Raspberry Pi, Arduino, microcontroller, or any other electronic project and join fellow electronics makers for a night of creativity and collaboration! This session is open forum to share your current projects—whether complete or in progress, it’s all interesting! Whether you’re deep into embedded systems, exploring new ideas, or just getting started, you’ll find a welcoming space to collaborate, share, and get inspired. **New to electronics or curious about tinkering?** You’re absolutely welcome. If you’re a beginner and want to experiment, I’ll have a couple of starter kits available so you can try things out—whether that’s blinking your first LED, putting something on a display, or experimenting with simple sensors. No pressure and no experience required—just an interest in learning and building. While we continue to pursue a more permanent venue for this Meetup, we’ll be using public library facilities based on availability. This session will be at the Worthington Park Library in the Olentangy Meeting Room.