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SparkFun will be closed May 25, 2015 for Memorial Day. Orders placed after 2pm on Friday the 22nd will ship out on Tuesday. Thanks!

BBB

Member Since: September 19, 2009

Country: United States

  • They are casting bismuth directly into 3d printed molds (http://makezine.com/projects/guide-to-3d-printing-2014/metal-casting-with-your-3d-printer/). I’ve been cold casting an epoxy/sand mixture into 3D molds. The molds are ABS which has been fumed with acetone vapor to smooth things out. By the way, I have found that vaseline makes a handy mold release for this. Just warm everything up to 150f and the vaseline melts and the casting comes right out.

  • Yeah it was the simplicity of the whole thing. One video per week, one click, sit back and watch. Too bad it became posted too late for my morning coffee in the eastern time zone. Dgerton is right that the home page has gotten too busy. I am not one of the many people who can’t stand change. Yet I have to admit I miss the old way of doing it. Different hosts and settings would be fine, but a single new product post on a given morning each week would be great. Other videos could be posted on other days The multimeter video was extremely well done and I will be linking students to it. I hope it is the beginning of a new series (soldering, discrete electronics, etc). The robotics videos were OK but a bit too limited to one product line.

  • I’ve been using one of those receipt printers for years in my steampunkish Haiku Generator and it’s been chugging along, printing out bad and sometimes scary poetry without a problem. So I can vouch for their durability. I do suggest you tear off the output toward the back at a sharp angle and aggressively for the best results.

  • I broke every interesting toy that was given to me, sort of on purpose to see how it worked. The mechanism was always vastly simpler than I had imagined. My most startling aha moment as an adult was finding out what happens when you put a large capacitor in backwards and give it power. My ears are still ringing.

  • Better be careful with that stuff, look what it has done to his voice and body (or maybe that’s what you are looking for Mr/Ms Jenner :).

  • I don’t see any sort of saw on your fabrication cart. How do you cut down stock? One of the most used tools in our little makerspace is a Rockwell Bladerunner. It’s basically a jigsaw mounted upside down in a table. It’s not a good quality tool and wont do precision work but it turns out to be really useful for simple cuts in flat stock and sizing sheet material for small CNC we have. It can also do limited curve cutting. Works for wood, plastic, and thin metal (with the right blade of course).

  • I can’t comment on this brand but the quoted build volume should not be the guiding factor in purchasing a 3D printer. I have seen many 3D printers that could not level their bed sufficiently across its length and width to actually print something large. If size matters to you make sure you get a printer that can reliably print at that size and claimed volume should not be your guide.

  • Great tips for sources. I don’t have new wisdom on other sources but here are examples from some interactive toys I have built for various makerfaires. The first image

    https://www.dropbox.com/s/p6e4boro90brd7n/makerfaire_2013.jpg?dl=0

    shows three projects. At left is a “Haiku generator”, somewhat steampunkish in inspiration, built into a prop fake antique wooden travel case from ebay. People like the case almost as much as the machine inside. Behind is an “Iron Chef kitchen countdown timer” built into an old PC speaker. I reused the speaker, amp, and on/volume switch that was already in the case. In the foreground is a “draw-a-min” built into a steel utility box from Skycraft Surplus & augmented with PVC tubing.

    The project for this year’s Orlando Makerfaire was “The Metropolis Device”

    https://www.dropbox.com/s/p2btd1nhu9sfw1p/metropolis_outside.jpg?dl=0

    I was going for more of a mad scientist’s lab from the art deco era. I hope Rotwang would have approved. Most of it was built into a something called a Caulkins Breakfaster that I got from Etsy. A lot of stuff was stuffed in there to drive lots of EL wire, servos, and an aquarium pump:

    https://www.dropbox.com/s/z0yddf0yklph7bf/metropolis_inside.jpg?dl=0

    You will also see bits from lamp fixtures, closet door frames, heat sinks, antique electrics and I dont remember what all sprouting from that thing. It lights up and bubbles furiously when tinkered with.

    I spend at least as much on the enclosures as the internals.

  • I used to buy 1 watt LEDs in this form with a built in driver from another source. It was a simple and cheap way to create LED lights. I would like to suggest stocking something like the LED strips that another vendor carries http://www.goldmine-elec-products.com/prodinfo.asp?number=G20003 These are available in a variety of voltages. The driver is built in. You just add the correct DC voltage and you are good to go. I wish these things had proper holes for mounting to projects however.

  • here you go http://www.youtube.com/watch?v=SA4yewFQT2A