As [tonyp7] freely admits, this is a pet project that’s just for the fun of it, made possible by the flood of surplus parts on the market these days. The VFD tubes are IV-25s, Russian tubes that can be had by the fistful for a song from the usual sources. The seven small elements in the tube were intended to make bar graph displays like VU meters, but [tonyp7] ganged up twelve side by side to make 84-pixel displays. The custom driver board for each matrix needs three of the old SN75518 driver chips, in 40-pin DIPs no less. A 3D-printed bracket holds the tubes and the board for each module; it looks like a clock is the goal, with six modules ganged together. But the marquee display shown below is great too, and we look forward to seeing the finished project.
The military have specific demands on components for their equipment. Hackers are well aware MIL-SPEC parts typically command higher prices. That quality is useful beyond their military service, which lead to how CERN obtained large quantities of a specific type of brass from obsolete Russian naval ordnance.
The remainder of the article shared many anecdotes around Fermilab’s use of armor plate from decommissioned US Navy warships. They obtained a mind-boggling amount – thousands of tons – just for the cost of transport. Dropping the cost of high quality steel to “only” $53 per ton (1975 dollars, ~$250 today) and far more economical than buying new. Not all of the steel acquired by Fermilab went to science experiments, though. They also put a little bit towards sculptures on the Fermilab campus. (One of the few contexts where 21 tons of steel can be considered “a little bit”.)
Akihabara, Tokyo has transformed over the years. In its present form Akihabara emerged from the ruins of a devastated Tokyo after World War 2 when the entire district was burnt to the ground. The area was rebuilt in the shadow of the Akiba Jinja (dedicated to the god of fire prevention), and a new breed of street vendors began to appear. Huddling under the protection of railway bridges, and dealing mostly in Black market radio parts, these vendors set a new tone to what would become Japan’s “Electric Town”. And as Japanese manufacturing prowess grew so too did Akihabara.
Now of course Akihabara is also home to Otaku culture, and is perhaps best known in this regard for its maid cafes. Streets are littered with maids touting their cafes, somewhat incongruously among computer outlets and precision tooling stores.
My interests however lie squarely in Akihabara’s glorious junk bins. Of all places I think I’m happiest digging through this mass of discarded technology from Japan’s manufacturing past.
A tour through the junks bins is like an archaeological dig. And in this article I will present some recent finds, and ponder on their relevance to Japanese manufacturing.
While some of the Hackaday crew is in LA for The Gathering, we decided to make a trip out to Apex Electronics, easily the oldest and largest electronics surplus store on the west coast.
Inside Apex, everything is stacked to the 20-foot ceiling with any electronic component you can imagine. Want a shopping cart full of huge capacitors? Awesome. Tube sockets? Done. Any kind of wire imaginable? That takes up two aisles. Test equipment abounds as well with oscilloscopes, signal analyzers and function generators, multimeters, and even a pair of cockpit voice recorders.
There’s also an outside yard at Apex containing at least two airplanes (one is a Cessna 150 that’s crying out to be made into a flight simulator), yet more test equipment, tons of video equipment, a few aircraft drop tanks, and enough aluminum extrusion to build anything.
If you’re wondering how fair the prices are at Apex, I picked up a grab bag assortment of wire wrap sockets (including a few 64-pin DIPs) that would cost $100 through the usual eBay/Chinese retailers for only $5. [Mike] picked up some stepper motors, proto boards, a pound of standoffs, and a dozen some vintage 7-segment displays for $20. No clue how much the test equipment costs, but from what we’ve seen the prices are low.
We’re not the first EE/Hacker Blog/Vlog to visit Apex. [Dave Jones] made the trek a few years ago and posted an awesome video. Below you’ll find a ton of pictures from our trip.
We have something like this right here at Hackaday. The dollar sign icon along the right column, just underneath the featured posts banner will take you to our classifieds section which at the time of writing had a whopping nine items posts. But these things to ebb and flow. Check in on the newly posted link from time to time to see that number grow.
Whether it’s over at The Junkbox or in our classifieds section, we think the biggest problem is finding what you need when you need it. This is nothing new. If you missed it before, we’ve embedded an older episode of the EEVblog after the break where [Dave Jones] tours Apex Surplus. It’s as if a hacker who has hoarding tendencies bought a store forty years ago and just kept piling more and more merchandise to the sky.
[Julian] was rummaging through a military surplus store when he spotted a pair of old helicopter pilot helmets that he absolutely had to have. At $25 they were a steal, but pretty useless in their current state. He decided to modify one of the helmets for use while playing video games, but he didn’t stop there.
The helmet had two decent speakers built-in so he kept them, but tweaked the wiring from a mono-only configuration to accept stereo input. A RF wireless headset was disassembled and wired into the helmet so he could use it for playing video games while his wife is asleep. As an added bonus, the headset he used happened to have an AM/FM receiver built in, so he can enjoy music while sitting around with his helmet on as well. A Bluetooth cell phone headset was also torn down and wired into the helmet for gaming and handling phone calls. The Bluetooth mic was extended into the original mic stem built into the helmet, keeping things authentic-looking.
Overall it’s a quite a useful recycling of some old military junk. It’s a great idea though the helmet looks like it could be a touch cumbersome after awhile.