Vintage microprocessors usually do something, be it just sitting in an idle loop, calculating something, or simply looking cool in a collector’s cabinet. [Lee] has come up with a vastly cooler use for an old microprocessor: he’s anthropomorphized it by wiring LEDs up to the address lines and arranged those LEDs into a face. After wiring up the right circuit, the face of LEDs slowly changes expressions, making this tiny little board react to random electronic fluctuations.
The CPU used for this project is the RCA 1802, best known for being the smarts in the COSMAC Elf, a very early microprocessor training computer, but still capable of teaching the basics of computing today, albeit on a processor that isn’t made any more with an instruction set that is barely supported by anything modern.
[Lee] apparently has a lot of these 1802s, and to show off how simple a microcomputer can get, he created the strangest use for a CPU we’ve ever seen. You can’t program this face of LEDs; the data bus is left floating so random values are ‘displayed’ on the face. Only one of the data lines is pulled high. This prevents the data bus from ever being 0x00, the HALT instruction.
If you’re looking for something a little more useful to do with an RCA 1802 MPU, [Lee] also has a COSMAC Elf membership card. It’s a reproduction of the famous COSMAC Elf, repackaged into a board the size of an Altoid tin. It has the 1802 onboard, a few switches and blinkenlights, and a parallel port for interacting with peripherals.
While it’s almost cliché to say they don’t make things like they used to, this week’s Retrotechtacular offers fairly conclusive proof that, at the very least, they used to put more time and effort into manufacturing consumer electronics. Gather your homemade wisecrackin’ robots and settle in front of this 1959 film entitled “The Reasons Why”, a rah-rah film created for new employees of the RCA Victor television division.
It may open with a jingle, but things quickly turn serious. Quality is no laughing matter for the men and women devoted to bringing you the best television set for your money. This type of unmatched excellence begins with tireless R&D into improving sound and picture quality. Every transformer is tested at five times the rated voltage, and every capacitor at two times the rating. Every switch undergoes a series of mechanical tests, including a pressured steam bath to ensure they will hold up even if you drag your set out to the porch some unbearably hot deep South August night.
Cabinet design is just as important—what’s the use in housing a chassis and kinescope that’ll last for 60 years in some cheap box? Woods from all over the world are carefully considered for their beauty and durability. A television set is, after all, the centerpiece of the American family room furniture group. These carefully selected woods are baked in a series of ovens to prove they’ll stand up to hours of continuous use.
Continue reading “Retrotechtacular: Designing and Building RCA Televisions”
Here’s the scenario: You’ve got the rage to play som CoD (we’re more GTA fans but whatever) but the monitor you’re going to play on has no speakers. You can get a crystal clear image using HDMI, but getting sound is a different matter. What’s the fix? Crack open your PS3 and solder on some audio connectors.
[Paul] knew there is a special cable that breaks out analog audio. Like original Xbox hacking of ages past, there is now plenty of information online about the internals of these machines. He grabbed a copy of the A/V pinout and found the analog audio pins. After soldering on this pair of RCA cables he
cut savaged a hole in the case and put the console back together. The machine he’s working with is a salvaged unit with no Blu-ray drive — he links to his past posts on the repair process. You may be thinking what good is it without an optical drive? Remember, this is the beginning of the Internet age… everything is downloadable.
Although not a hack in the sense that it was made by a large corporation, check out this capacitive electronic disk that [danielbpm] wrote in about. Here’s a Wikipedia article about it, as well as a video (which didn’t embed correctly) about how it was made. The disks look like a typical audio record, and it was conceived of in 1964. A prototype was manufactured in 1972.
Unlike the more well-known Laserdisk format, the [Capacitive Electronic disk], or [CED] used an actual stylus to read the disks. Because of this, the [Wikipedia] article astutely points out that both systems were mutually incompatible. Somewhere there might have been a scratched Laserdisk next to the VCR with a sandwich stuffed in it. The computer with a broken coffee holder wouldn’t come for another few years.
Although it may have been a good format in it’s own right, like Betamax or HD-DVD, this system wasn’t destined to become the Blu-Ray player of it’s time.
[NatureTM] used part of the Thanksgiving holiday to get composite video output working with an MSP430 microcontroller. He’s using one of the chips that came with the TI Launchpad, which is a big hardware limitation because of the relatively small code memory and RAM. The chip displays one still image at a resolution of 192×40 pixels. Still, this is a great way to learn about composite video signals, as a lot of other projects use a TVout library to save you the headaches. All you’ll need is a TI Launchpad, a 16 MHz crystal oscillator, two resistors, and an RCA jack. Dig through the code and see what a great job [NatureTM] did of offloading as much work onto the chip’s peripherals as possible.
The Target Project is a graduate project from the Royal College of Arts in London. It is designed to make us question our relationship with surveillance technology and CCTV. This is a particularly meaningful demonstration for a country like Britain which is said to contain up to 4.2 million CCTV cameras or roughly 1 for every 14 people.
This project has two demonstrations on their site. The first is dubbed the RTS-2 (Racial Targeting System). This system is essentially a camera which follows faces and is able to analyze and interpret the person’s race. The second is SOLA. This system is able to quickly scan someone and calculate their body mass index then publish this information to the web. Both systems achieve their goal by blatantly pointing out a line in which more surveillance does not equate to more security. They also show the wealth of personal data that can be obtained about a person by a simple camera.
[via we make money not art]