Electronics

Want to mess with some electronics? Or perhaps contribute to HacDC's main group project? HacDC's latest event brings hardware projects to the community. We will focus primarily on the main project (Space Blimp!) but please feel free to bring some of your own projects to show off and work on!

***In Person Location:*** Rockville Library, second floor meeting room (Collaboration Room 3). Will recreate our Preamp circuit board inside EasyEDA to make it shareable for others. This ideally will also allow us to finish up design enough to submit for a materials grant program. We are experimenting with a new virtual join link - [https://meet.jit.si/mocomakers](https://meet.jit.si/mocomakers) If you can make it in person, that's always recommended! Let's resume repeated full end-to-end testing cycles and continue to iterate our design and resolution. We are getting close. Our community is building (and documenting for other teams) how to build a scanning tunneling microscope using a mix of common and 3D printed parts. This will allow us to scan and visualize a single atom - an ambitious we are doing over the course of a few months. The MoCo Makers community is one of the most innovative and competent groups in Maryland, and we've done everything from [publishing cancer research](https://pubmed.ncbi.nlm.nih.gov/38136356/), to [launching products](https://www.kickstarter.com/projects/gotim/cozy-curvy-multi-contour-pillow), [winning grants](https://covidinfocommons.datascience.columbia.edu/awards/2014255), and inspiring thousands. Now our biggest challenge yet has appeared. We are building a Scanning Tunneling Microscope, that will allow us to scan and visualize single atoms. Does it sound hard? Perhaps.. However! I have every confidence that we are now operating at a level were we can take on this mean, cross-functional project. We continue to build on our past successes, and a key technology we previously applied was increasing the signal of small voltages using OpAmps - which we did during our custom pH Probe project - [https://www.mocomakers.com/ph-probe/](https://www.mocomakers.com/ph-probe/) \- That technology is exactly what we need to get this machine working\, and at a high precision\! To get a better idea of what we are doing, see our reference project here: [https://www.youtube.com/watch?v=7N3OqTEq08g](https://www.youtube.com/watch?v=7N3OqTEq08g) All starting CAD, code, and reference files should exist. However, let's be the first Maker community to document the build process and share it with learners around the world. We have a bit over $2,000 in materials costs, so if you want to sponsor this project, and get banners at events with 20K attendees, and access to our email broadcast of 30K members, please contact matt@mocomakers.com We are also open to university, lab, or community partnerships so feel to reach out if you want to be part of this project. Together, we can do incredible things. ***In Person Location:*** Rockville Library, second floor meeting room (Meeting Room 3). To Join Virtually: https://meet.jit.si/mocomakers

Let's take another field trip out of SW. [Merry Pin](https://www.merrypindc.com/) at 7350 Georgia Ave., NW is kindly allowing us to crash their monthly Sip and Stitch, where we can indulge in adult drinks and light snacks as we craft. And as well-situated as the library is, the atmosphere is rather austere whereas Merry Pin is.... merry. And crafty. Their event starts at 5:30pm but they're open until 9 so don't feel pressured to get there early. I intend to get to Georgia Ave-Petworth station around 5-5:15 and make a judgment call about taking the D40 for 20 minutes up Georgia ave or a lyft/uber for a 15 minute ride. Depending on how many of us make it at 5 (I know it's early), I might just pay for a car and make all of our lives easier. If you rsvp and want to meet me at the station, please leave a message in the comments so I know to look for you. Note: The crafting area is up a flight of stairs if that poses any issues.

**CMRMCE** meetup Meetings start at 7 pm Meeting address: 6425 Abel St Elkridge MD 21075 Our meetings are always free and open to everyone. Our meetings are informal, and we tend to discuss whatever anyone has brought with them to show as well. We also discuss local rockhounding ideas. Even though we usually plan to wrap up around 9 pm, most of us are usually still chatting at 10. It is amazing the amount of knowledge that we share with each other and the body of knowledge that we have as a group. All of our meetings have been great (even when only a few show up). I do ask that you RSVP for our meeting, but... if you haven’t RSVP'd and would still like to come to the meeting – please do. The RSVP helps the meeting by showing others that we do have a group and that there will be a meeting that night. If you RSVP’d yes and can’t make it, that’s OK too (you can always change your RSVP at any time). I hope that you will consider attending (newbie or Guru). Our group has been meeting for over 10 years now. We have over 350 total members and we’ve maintained a 5-star rating for our meetings. I believe that you will enjoy yourself and we will enjoy your company as well. As always, everyone is invited to our meetings (including your non-Rockhound guests). Our meeting size averages about 4 to 9 members per meeting, but we have had as many as 14 attend. I hope you can make it, we are very informal, and if you can, bring something (rocks, fossils, **yard rock**, book, map, or **whatever**) that you would like to discuss. I truly look forward to meeting you. ***Wayne Homens*** Founder, **C**entral **M**aryland **R**ock and **M**ineral **C**ollectors **E**xchange 410-419-2963 (Mobile) http://www.meetup.com/rockhounds

It’s been a while… but we’re back for Third Thursday 🎉 Join us on Thursday, April 16, 2026 for a fun evening of good vibes, great company, and a chance to reconnect! 📍 Sports & Social 1314 U St NW, Washington, DC 20009 🕕 6–9 PM Bring your friends, meet new faces, and let’s make it a night to remember. See you there! ✨ And yes, we will be having events on Third Thursdays of the remaining months in 2026! Save the dates!

The Astronomical Society of Greenbelt will hold a star party at the Greenbelt Observatory near Northway Fields on Saturday, April 18 from 9:00 to 11:00 PM. The event is free and open to the public. Visitors can come in to the observatory dome to watch the telescope operators or bring their own telescopes. The event will be cancelled if it’s clouded over or raining. All are welcome. Children should be accompanied by a parent or guardian.

Title: Potential Applications of Negative Radiation Pressure in Astronomy, Medicine and 2WQC Date: April 19 2026 10:00 am - Noon EDT (16:00 - 18:00 CET) Abstract: While we are used to heating and pushing with light, there is also optical cooling and pulling. I will talk about negative radiation pressure, potential ways to generate it, and its novel applications, like non-ionizing medical scanners, 2WQC (two-way quantum computers) in theory solving NP problems, also potential astronomical sources and their observation. Speaker: Dr Jarek Duda is an assistant professor at Jagiellonian University. He holds degrees in computer science (PhD), mathematics (MSc) and physics (PhD). He is mainly focused on physics foundations, information theory, statistical analysis, and is known for introduction of asymmetric numeral systems.

Spring into celebration and let freedom ring in the nation's capital! DC Emancipation Day 2026 will be celebrated on Sunday, April 19, 2026, with a festival at Franklin Park featuring a parade and concert, honoring the 21st anniversary of the official city holiday. The celebration marks the April 16, 1862, signing of the Compensated Emancipation Act, which freed over 3,100 enslaved people in Washington, D.C. It is this legislation, and the courage and struggle of those who fought to make it a reality, that we commemorate every DC Emancipation Day. This year's celebration will be marked with a parade, concert, and much more! HOW TO GET THERE To get to ⁠Franklin Park (1332 I St NW) using the Metrorail, your best bet is to head to ⁠McPherson Square, located on the Silver, Blue, and Orange Lines. It's the closest station, located just a block away at 14th and I St NW. Exit from the 14th and I St NW side. Due to the expense and difficulty of driving and parking in DC, taking the Metro is highly recommended. WHERE TO MEET We will meet outside the 14th and I St NW exit of McPherson Square. NOTE: It may be crowded and noisy. It will be outdoors. Please plan accordingly for any sensory or mobility issues and dress for the weather. If the weather calls for heavy rain and/or thunderstorms, I will cancel this event. See you soon, Jenny

Sol Roots Band blends raw funk, deep blues, rock, soul, and hypnotic grooves. With a unique voice and top-tier musicians, Sol honors musical legends while forging his own powerful sound. Bring a chair. We will sit near the front to the right facing the stage.

Join us for another lively gathering of the DC Creative Collective for Film, TV, and Theater — a welcoming space for filmmakers, writers, actors, and creative enthusiasts across the DMV to connect and create together. This meetup is a chance to connect with fellow artists, an opportunity to catch up with each other, and discuss opportunities for collaboration. This meeting we will work on brainstorming for our club project. We are finalizing our team for the 48-Hour Film Challenge, come learn more about the challenge, and how you can be a part of it. We would love to find a place for you. Whether you are experienced in the industry or just beginning your creative journey, come ready to build community, share stories, and help shape a collaborative artistic home where ideas move from imagination to stage and screen.

**Goombay Smartphone Photography Hike $25.00 per hiker** ***SPACE IS LIMITED PURCHASE $25.00 TICKET TODAY:*** [https://goombaydc.leagueapps.com/camps/4834744-2026-goombay-photo-hike---spring](https://goombaydc.leagueapps.com/camps/4834744-2026-goombay-photo-hike---spring) Join us on **Saturday April 18, 2026** at the beautiful **Patuxent Research Refuge in Laurel, MD** for a special **Smartphone Photo Hike**! Explore the scenic trails and learn how to capture stunning shots with your own smart phone camera. Our experienced photographer will be there to show you how to elevate your photography game! No prior experience needed – just bring your smartphone or digital camera and your enthusiasm! We'll even have light snacks and refreshments. It's the perfect way to spend a Sunday morning connecting with nature and unleashing your inner artist! **Saturday, April 18, 2025** **From 9:00am - 12:00pm (Hike begins at 9:30am)** **Patuxent Research Refuge \|** **10901 Scarlet Tanager Loop, Laurel, MD 20708** **We will meet at the Visitors Center Parking Lot** **COST:** $25 per camper (includes: Guided Hike, Professional Photography Lesson, light snacks and refreshments) *\* Payments are non-refundable but transferable to another hiker for this event only* **HIKE DETAILS:** 3.5 Mile Beginner Trail **WHAT TO BRING:** * Your digital camera or smart phone * Sturdy hiking sneakers or boots * Small Day Pack with snacks & water * Water & Trail Snacks * Bug Repellant **AGENDA:** 9:00am-Meet in the parking lot at the Visitors Center and Check In 9:15am - Introductions and light stretching 9:25am - Pre-Hike Group Photo 9:30am - Depart for trail 11:00am - Return from hike 11:30am - Light refreshments and discussion 12:00pm - Event Ends ***\*\* There is a restroom at the Visitor Center*** ***REGISTER:*** [https://goombaydc.leagueapps.com/camps/4834744-2026-goombay-photo-hike---spring](https://goombaydc.leagueapps.com/camps/4834744-2026-goombay-photo-hike---spring) ***JOIN GOOMBAY'S HIKING GROUPME CHAT*** ***[https://groupme.com/join_group/26884774/l0573V](https://groupme.com/join_group/26884774/l0573V)*** **For more details contact TK at (708) 778-3864**

**Advance reservations REQUIRED. Tickets/Info:** [https://www.internationalclubdc.com/Events/EventDetails.aspx?EventID=C210D19F-D41E-49ED-A66F-EB4EF696BF55](https://www.internationalclubdc.com/Events/EventDetails.aspx?EventID=C210D19F-D41E-49ED-A66F-EB4EF696BF55) The International Club of DC and the RCAS cordially requests the pleasure of your company at the Embassy of France, La Maison Francaise for a delightful evening of classical music. The concert is followed by a French wine reception to meet other guests in attendance. You are welcome to attend on your own or with friends. Tickets for the rare delight of a classical concert at the French Embassy featuring the world-renowned performers are only $65 for a limited time. The International Club of DC is very grateful to the RCAS for presenting this concert as well as the Embassy of France, La Maison Francaise for hosting the concert. After the concert meet other guests in attendance during the wine reception. Space is limited so please reserve your tickets early. Kindly note that the event is presented as a concert followed by wine reception and not a dinner function so please plan to have dinner before or after the event. If you purchase more than one ticket, please send us the full name of each of your guests. **Advance reservations REQUIRED. Tickets/Info:** [https://www.internationalclubdc.com/Events/EventDetails.aspx?EventID=C210D19F-D41E-49ED-A66F-EB4EF696BF55](https://www.internationalclubdc.com/Events/EventDetails.aspx?EventID=C210D19F-D41E-49ED-A66F-EB4EF696BF55) **Classical Music Performance** Enjoy a delightful evening of classical music at the Embassy of France, La Maison Francaise featuring the music of the Zingaresca Ensemble: Songs of Passion & Love The Zingaresca Ensemble returns with Songs of Passion and Love, a vibrant concert continuing the RCAS 20th Anniversary celebration! Enjoy a captivating blend of musical traditions in a heartfelt celebration of love and longing. **Advance reservations REQUIRED. Tickets/Info:** [https://www.internationalclubdc.com/Events/EventDetails.aspx?EventID=C210D19F-D41E-49ED-A66F-EB4EF696BF55](https://www.internationalclubdc.com/Events/EventDetails.aspx?EventID=C210D19F-D41E-49ED-A66F-EB4EF696BF55)

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.

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.

AI is changing how art is made. But when does it stop being your work and start being the machine’s? This month we're going to be doing a panel with with digital image, music, and written word artists, talking about at what point, while using AI in the creation process, does the work become not the artist creation? We encourage audience participation during this event that will be moderated by Chris Slee. Whether you’re deep in the field or just getting curious, come connect with others building and exploring AI in Columbus. Sponsored by [Transform Labs](https://www.transformlabs.com/services) Sign up also accessible via [Transform Labs Luma](https://luma.com/55umjqta)

Join the CONNECTED Westerville Mastermind Group for a dynamic afternoon of B2B networking! This event is perfect for professionals looking to expand their business connections, share insights, and foster collaboration within the community. Whether you are a seasoned entrepreneur or just starting out, this event offers a valuable opportunity to exchange ideas, build relationships, and grow your network in a supportive environment. Connect with like-minded individuals, explore potential partnerships, and discover new opportunities for professional growth. Don't miss out on this chance to enhance your business network and take your career to the next level with CONNECTED Westerville Mastermind Group! We meet the 4th Monday of every month from 11am-1pm. Welcome and general networking from 11am - 11:30am with core meeting 11;30 - 12:30 and a final round of networking from 12:30 - 1pm.

It’s time to take control of your mental health. How do you get rid of stress, anxiety and uncertainty? These emotions are buried deep in your reactive mind. Find out what the reactive mind is, and in the process find yourself. Have you ever suffered from a traumatic experience, a deep loss or been through a painful breakup? Has your ability to communicate suffered as a result? And after that, even though you "moved on" did you find that things were never quite the same? Have you ever looked at childhood photos, or reminisced your early life and wondered where that happiness and spark went? Are your emotions out of your own control? Have you ever felt, even if you aren’t aware of it, that possibly you are getting in your own way of your happiness and success? How does this affect your self-confidence? Find out what is at the root of all stress, anxiety, depression and self-doubt. Find out how and why you hold yourself back from achieving your goals and having the life you have dreamed of. As soon as you learn what is at the root of these unwanted conditions, you’ll see it is something you can DO something about. You will not be labeled or categorized at this MeetUp.

Dinner and dancing