I made a stepper motor controller about 30 years ago with just TTL gates. Today I'd use a PIC microcontroller, but for open source, you want to work with the bare wires. Get a 'solderless breadboard' an assortment of chips, some LEDs and a big piece of #20 wire to cut to short lengths and strip the ends on. You need a 5 volt supply, but you can salvage one from a cellphone wall-wart charger. That part is much easier than it was 30 years ago.
You can get a bunch of TTL gates on eBay, I think.
You can get UNO clones on eBay for several dollars. They work fine, though people who have bought into the 'Open Source Hardware' in a way that they want to sell $30 boards with $2 of components on them get riled up about.
I grew up with a copy of Horowitz and Hill, first edition, but there's a sizeable contingent of people who pull a Martin Prince about H & H (they are 'familiar with his work' so to speak). It's an excellent book for general coverage of practical electronics, but snobby EEs find it threatening (it empowers people who didn't have to take all the sucky classes they did, I presume)
Plenty of people have constructed their own CPU with discrete logic gates. You can 'cheat' on the ALU and just use the 74LS181 chip, for instance, and throw the registers around it using octal latches like 74LS373s and the like. And of course the 7464 for a bit of scratchpad RAM. Some of them are fairly rare at this point in time, but you could make your own ALU if you really wanted using MSI logic.
There are plenty of open-source development tools for the Microchip PIC processors. You can do everything you want within Linux with 'free' tools, including the bootstrap to burn the binary into flash on the chip. That mostly means Assembly Language, though. I don't think there is an open-source C compiler yet for the PIC family. The CPU itself is closed, but there's no 'hidden' supervisory processor or anything. That we know of.
Are TTL gates 'open' enough? Or do we need to wire up the flip flops ourselves? I have big bags of TO-92 transistors, and plenty of resistors.
Or do we need to fabricate point-contact transistors ourselves? (I think diffusion transistors are beyond 'open source' for the individual.)
It isn't beyond the capabilities of an individual to learn how to make their own vacuum tubes, if we need to stay with things an ordinary human can do themselves, because doping silicon or germanium is pretty tricky.
I purposefully use the Chrome browser as little as possible. Because I don't want to contribute to the creation of the next big web monopoly. We've learned from Microsoft's past not to use the biggest thing every time.
The Windows Phone hardware and the built-in OS was pretty nice. It was certainly better maintained and updated than Android on the equivalent hardware (mine was an under $100 Nokia on Virgin Mobile).
But the Windows Phone App Store was a disaster. Hardly any worthwhile apps at all, lots of really really terrible third-world shovelware. At the time I was using it, there were dozens and dozens of Flappy Bird copies and clones.
The success Tesla has had is in applying the PayPal business philosophy to automotive. It's certainly the kind of thing that gets eyeballs. Websites and journalists just eat it up.
LIN and CAN were intended to reduce the cost of automotive wire harnesses. It's odd (or not, this is automotive we are talking about) that costs and complexity are up.
Ok, it's not. I have direct experience in the automotive controls biz. GM just discovered the existence of capacitors for despiking in the last year. The automotive sector, at least in Detroit, is chuck full of boneheads.
There was actually a big crackdown on cryptocurrencies this past week in China. Officials in businesses involving bitcoin are not permitted to leave China until the investigation is complete. So yes, these guys are specifically singled out at the moment. Duh.
It's interesting to note the organization you mention chose to turn 'Military Industrial Complex' into the phrase 'Educational Industrial Complex' when in the same farewell speech where Eisenhower coined the phrase 'Military Industrial Complex' he also warned of the risks of the rise of a scientific-technological elite. Which has always been soft-pedaled or ignored by the pundits who carry on incessantly about the M.I.C.
Slashdot Mirror
Your dick is making that funny sound again.
Mostly it's geese and other rather dumb birds that get sucked into jet engines.
You can just burn the drone after you've shot it down, can't you? It's a big hassle digging a hole.
I made a stepper motor controller about 30 years ago with just TTL gates. Today I'd use a PIC microcontroller, but for open source, you want to work with the bare wires. Get a 'solderless breadboard' an assortment of chips, some LEDs and a big piece of #20 wire to cut to short lengths and strip the ends on. You need a 5 volt supply, but you can salvage one from a cellphone wall-wart charger. That part is much easier than it was 30 years ago.
You can get a bunch of TTL gates on eBay, I think.
You can get UNO clones on eBay for several dollars. They work fine, though people who have bought into the 'Open Source Hardware' in a way that they want to sell $30 boards with $2 of components on them get riled up about.
I grew up with a copy of Horowitz and Hill, first edition, but there's a sizeable contingent of people who pull a Martin Prince about H & H (they are 'familiar with his work' so to speak). It's an excellent book for general coverage of practical electronics, but snobby EEs find it threatening (it empowers people who didn't have to take all the sucky classes they did, I presume)
Plenty of people have constructed their own CPU with discrete logic gates. You can 'cheat' on the ALU and just use the 74LS181 chip, for instance, and throw the registers around it using octal latches like 74LS373s and the like. And of course the 7464 for a bit of scratchpad RAM. Some of them are fairly rare at this point in time, but you could make your own ALU if you really wanted using MSI logic.
There are plenty of open-source development tools for the Microchip PIC processors. You can do everything you want within Linux with 'free' tools, including the bootstrap to burn the binary into flash on the chip. That mostly means Assembly Language, though. I don't think there is an open-source C compiler yet for the PIC family. The CPU itself is closed, but there's no 'hidden' supervisory processor or anything. That we know of.
Are TTL gates 'open' enough? Or do we need to wire up the flip flops ourselves? I have big bags of TO-92 transistors, and plenty of resistors.
Or do we need to fabricate point-contact transistors ourselves? (I think diffusion transistors are beyond 'open source' for the individual.)
It isn't beyond the capabilities of an individual to learn how to make their own vacuum tubes, if we need to stay with things an ordinary human can do themselves, because doping silicon or germanium is pretty tricky.
I purposefully use the Chrome browser as little as possible. Because I don't want to contribute to the creation of the next big web monopoly. We've learned from Microsoft's past not to use the biggest thing every time.
The Windows Phone hardware and the built-in OS was pretty nice. It was certainly better maintained and updated than Android on the equivalent hardware (mine was an under $100 Nokia on Virgin Mobile).
But the Windows Phone App Store was a disaster. Hardly any worthwhile apps at all, lots of really really terrible third-world shovelware. At the time I was using it, there were dozens and dozens of Flappy Bird copies and clones.
Since '64' seems to be the important number to some of you, why not just get a Commodore 64, or a Nintendo 64. Those have 64-ness, too.
The success Tesla has had is in applying the PayPal business philosophy to automotive. It's certainly the kind of thing that gets eyeballs. Websites and journalists just eat it up.
LIN and CAN were intended to reduce the cost of automotive wire harnesses. It's odd (or not, this is automotive we are talking about) that costs and complexity are up.
Ok, it's not. I have direct experience in the automotive controls biz. GM just discovered the existence of capacitors for despiking in the last year. The automotive sector, at least in Detroit, is chuck full of boneheads.
Indeed it does. One might even say they will get some extra security due to the obscurity of their hardware. Yup sirree.
Next they will come for our AMD processors! (Hugs Amiga 500 in fear)
There was actually a big crackdown on cryptocurrencies this past week in China. Officials in businesses involving bitcoin are not permitted to leave China until the investigation is complete. So yes, these guys are specifically singled out at the moment. Duh.
And boy, is Bill relieved. His wife the harridan almost got elected.
You mean, a version of Sheen who doesn't suck?
So it's a separate little room, with obscure methods used to hold it's little secrets.
I realize that Apple probably has the term 'Secure Enclave' copyrighted, similar to 'Altivec Unit' and various other buzzwords from the past.
The enclave can and will have it's security penetrated. It's a matter of time.
But whatever. I'm dumb. You're the Apple shill.
I used wget to grab the whole set of the current version installers. You can never be too safe.
Larry is probably not into golden showers.
Don't drag your private life into the discussion, creimer.
Oh, and your link to Mike Wilson's book? It's quite an old book at this point. It would be a terrible mistake to buy it off an Amazon.com link.
ABE Books has it available for $3.48 with free shipping.
Poor analogy, Pupils are not employees.
A better analogy would be 'In (the resturant/retail/service) industry, you take whatever customer walks in the door.'
It's interesting to note the organization you mention chose to turn 'Military Industrial Complex' into the phrase 'Educational Industrial Complex' when in the same farewell speech where Eisenhower coined the phrase 'Military Industrial Complex' he also warned of the risks of the rise of a scientific-technological elite. Which has always been soft-pedaled or ignored by the pundits who carry on incessantly about the M.I.C.
OpenBSD is still pretty strong on Sparc, I would suppose. It's Theo's arch after all.