If you haven’t heard via the mailing list and meetings, OMG has moved! Our new address is 8410 K St. #5.
Come check it out!
Tonight’s meeting was a great success, thanks in large part to Tom’s Balloon Animals presentation/workshop. Â Members and visitors were shown, and then guided through making a variety of plants, animals, and inanimate objects.
Additionally, we had a number of visitors, and worked on projects including a Peltier-cooler proof of concept and a grinder stand. We also dusted off an old Teletype, in preparation for it’s impending Twitterification.
If I hadn’t seen this myself, I don’t know that I’d believe it. Last night, we set out to test this Popsci article, and it seems to hold up.
We had 2 locks donated, a generic U-Lock, and a pretty beefy looking keyed padlock. The U-Lock’s steel turned out to be a bit too soft, and just bent a bunch, but the shackle on the padlock failed relatively quickly.
All said, we used 2 cans of air, but quite a bit of that was spent on the first lock. Both the body of the lock and the shackle sustained quite a bit of damage, though the damage to the body was mostly cosmetic and probably not “breaching”.
If I were to try it again, 2 things: 1. Strike the shackle directly, with a chisel or something, instead of the hammer face. 2. More lighting. Â The high-speed video was too dark to really show anything interesting. Â I keep forgetting how much light that thing takes..
A while back, we decided that we needed a 24v power source for various “testing” applications. This source needed to be durable enough for daily use by a wide variety of people without becoming damaged. It also needed to protect the device being powered, and be easy to maintain.
Given that tall list, Ben suggested a HobbyKing LiPo pack, 6S, 5Ah. With that start, we decided that it should have volt and amp meters for monitoring, as well as a circuit breaker to provideÂ positiveÂ power disconnect, and protect the battery (easily capable of 150A into a dead short).Meters were ordered from Ebay and the breaker was something out of an old UPS.
The blue enclosure is a waterproof storage box from Walmart, modified to pass through various connectors. Â It’s not waterproof at this point, but we’re more after the durability of the polycarbonate than the waterproof aspect anyhow.
Internally, there’s quite a bit going on. Â The battery is packed into a foamed-off area, while the other side contains the electronics, including the circuit breaker,ammeter shunt and all the connectors.
Charging is accomplished via a modified ATX connector (which re-presents the balance plug and main power leads), with a fuse to protect against abuse. The idea is that it’s virtually impossible to charge the battery improperly, or to break a relatively fragile balance connector.
Overall, it was a pretty straight-forward build, and cost around $90, including the battery and all the connectors.
Recent photos from our flickr stream.
Just a reminder, the Omaha Maker Group’s regular meeting on Tuesday, September 4th is an Omaha Creative Week Spark Event. We have several presentations on the docket, including a summary of the Omaha Maker Group (and Making as a whole), as well as a hands-on presentation on manipulating your car’s onboard computer for diagnostics and customization.
Hope to see everyone there! Â If you have questions, don’t hesitate to email email@example.com.
As part of the recent OMGWTFBBQ festivities9, a contest was held, pitting the forces of gravity against the weight of cold hard cash (pennies, to be specific). Â The goal of the contest was to use soda straws to support as much currency as possible in as high of a position as possible, thus racking up the most “inch-cents” of score.
As it turns out, we ended up going to “foot-dollars” and using weights that weren’t exactly copper, given the engineering of some of the entries. Check out the results below.
|Stephanie & Cait||8.25||2898||23908.5||19.92|
|John & Don||11.25||271.5||3054.38||2.55|
|Claire & Dad||7.5||271.5||2036.25||1.70|
|Jess & Company||14.25||45||641.25||0.53|
|Patrick & Travis||19.375||14||271.25||0.23|
|Ben & Dave||11.5||0||0||0|
Would you like to learn about lock picking? Come to our meeting Tuesday July 10th @ 7pm.
The meeting will feature a talk from a member of Toool.us (The Open Organization of Lockpickers), Steve Beck.
Steve will cover three topics, two of which are a little more hands on-ish, the first will be a basic lockpicking talk, the second will be a re-keying talk with a demo and the third will be about making your own picks with a demo.
Stick around after the talk for socializing and Makery Shenanigans.