We’ve all seen, and occasionally wrestled with, bill acceptors like the one [Another Maker] recently liberated from an arcade machine. But have you ever had one apart to see how it works? If not, the video after the break is an interesting peak into how this ubiquitous piece of hardware tells the difference between a real bill and a piece of paper.
But [Another Maker] goes a bit farther than just showing the internals of the device. He also went through the trouble of figuring out how to talk to it with an Arduino, which makes all sorts of money-grabbing projects possible. Even if collecting paper money isn’t your kind of thing, it’s still interesting to see how this gadget works on a hardware and software level.
As explained in the video, a set of belts are used to pull the bill past an array of IR LEDs. The hardware uses these to scan the bill and perform some dark magic to determine if it’s a genuine piece of currency. [Another Maker] notes that these readers actually need to receive occasional firmware updates to take into account new bill designs. In fact, the particular unit he has is so out of date that it won’t accept modern $5 bills; which may explain how he got it for free in the first place.
Years ago we saw one of these bill acceptors used to make a DIY Bitcoin ATM. Of course back then, a few bucks would get you a semi-reasonable amount of BTC. These days you would skip the paper currency and do it all digitally.
Continue reading “Using A Vending Machine Bill Acceptor With Arduino”
The Bank of England has announced that the new face of the £50 note is to be Alan Turing. This news follows a round of public nominations for a scientist to fill the space, and Turing was in the running with some stiff competition from the likes of Stephen Hawking and Ada, Countess Lovelace.
The fifty is not a note you’ll see very often even if you’re a Brit, it’s the one you’ll usually only come into contact with if you’ve bought a second-hand car, but the importance of this move goes beyond whether or not the note will be proffered at the bar for a foaming pint of mild ale. It’s not an honour that is handed out lightly, and it is particularly poignant in the case of Turing who despite his wartime codebreaking and genesis of the discipline of computer science was disgraced and pushed to suicide in the 1950s when he was discovered to be gay.
Will Hardware Pictured on the Bill Be as Famous as Turing Himself?
The bank has not yet set the engravers to work, but they have generated this mock-up that features alongside Turing himself a table from a Turing machine example superimposed on a picture of an early computer rack. We don’t think it’s EDSAC or Manchester Baby, it’s not a Bombe and it definitely shouldn’t be Colossus as he had little to do with it, but we are sure that among our readers will be someone who can provide a positive identification. We hope that whatever the final design may be, it does justice to Turing’s legacy.
Continue reading “Alan Turing To Be The Face Of Fifty Quid”
You can tell a lot about a country, its history and its politics, by taking a look at its banknotes. Who features on them, or in the case of studiously engineered international compromises such as the Euro, who doesn’t feature on them. Residents of the UK have over the years been treated to a succession of historical worthies on their cash, and when a new revision of a banknote is announced you can be certain that the choice of famous person to adorn it will be front page news. Today we have a new banknote on the way, and this time the selection is squarely in Hackaday’s sphere of interest because the public is being urged to nominate a scientist for the honour. The note in question is the £50, the one that nobody uses and plenty of shops won’t even accept, but still, it’s an important choice that will replace the incumbents on the present version, steam engine pioneers Matthew Boulton and James Watt.
So, given a blank £50, who would you put on it? Candidates must be British, not fictional, and also no longer alive. Names in the frame include Ada, Countess Lovelace, Stephen Hawking, and Alan Turing, though with such a wide field to choose from there are sure to be many more front-runners. You might, for example, wish to consider Rosalind Franklin, but you can forget Isaac Newton, Charles Darwin, or Michael Faraday as they have all already featured on British banknotes.
Hackaday does not take sides in such endeavors, but it’s still an opportunity to back your most inspiring figure. As your scribe, it’s a tough one between Lovelace and Turing, though Turing probably wins by a short head. Who would you like to see on the next £50 note? The bank has produced a short promotional video which we’ve placed below the break.
Continue reading “Who’s Going On Your Fifty?”
Running a hackerspace is no easy task. One of the biggest issues is money — how to collect in dues and donations, managing it, and how to spend it. Everyone has different interests and would like to see the budget go to their favorite project or resource. Milwaukee Makerspace has come up with a novel way to handle this. Members pay $40 a month in dues. $35 of that goes into the general budget. The member themselves can pick where the last $5 goes.
Using the hackerspace’s software, members chose where their $5 goes each month. It can all be spent in one area or split up among different resources at the hackerspace. Members choose from many different interests like the 3D printing area, the laser lab, the forge, or specific projects like the power racing series. This results in a budget for each area which can be used for materials and parts. It also gives the hackerspace board of directors information on which resources people are interested in, and which they aren’t.
In the current budget, no one is supporting the anodizing area, but lots of people are supporting the laser lab. This is just the sort of information the board could use when planning. Perhaps they could store the anodizing tools and expand the laser lab. Click through to the link above and see how this year’s cash voting panned out.
Of course, all this only works if you have a hackerspace with plenty of active members. In Milwaukee’s case, they have about 300 members. Would this work for your hackerspace? Let us know down in the comments!
If you’re comfortable with the technical side of becoming a consultant or contractor but are unsure what to charge for your services, you’re not alone. “How much do I charge?” is a tough question, made even tougher by the fact that discussing money can be awkward, and at times virtually taboo.
As a result it’s not uncommon for the issue to get put off because it’s outside one’s comfort zone. Technical people in particular tend to suffer from an “if you build it, they will come” mentality; we get the technical side of things all figured out and just sort of assume that the rest — customers, money, and so forth — will fall into place afterward. If you’re lucky, it will! But it’s better to do some planning.
The short and simple answer of how much to charge is a mix of “it depends” and “whatever the market bears” but of course, that’s incredibly unhelpful all by itself. It’s time to make the whole process of getting started a bit less opaque.
A stubborn determination to solve my own problems has given me plenty of opportunity to make mistakes and commit inefficiencies over the years; I’ve ended up with a process that works for me, but I also happen to think it is fairly generally applicable. Hopefully, sharing the lessons I’ve learned will help make your own process of figuring out what to charge easier, or at least make the inevitable blunders less costly.
Continue reading “Life On Contract: How Much Do I Charge?”
As technology advances forward so does the numerous ways to beg for money. [Chris Eckert] has developed a robot to do the deed for him. With an odd eye mounted on the top of the robot to invoke pity presumably and a tin can out front to collect change from people it may encounter this is quite the hobo robot. On his build log, you’ll find tons of great pictures of the entire process from start to finish. With robots sent to beg people for money, it is only a matter of time until the first squeegee robot is cleaning your car at a red light. Make sure to check out the video after the break.
Continue reading “Creepy Robot Really Wants Money…”
Maxim’s iButtons, which are small ICs in button-sized disks, are starting to show up in more and more places. They have a range of uses, from temperature loggers to identification, and all use the 1-wire protocol to communicate. Over a furrtek, they hacked an iButton used for buying things from vending machines and created an infinite money cheat. They built a small rig based on the ATmega8 to read and write data to the chip. The data was encrypted, so it wasn’t feasible to put an arbitrary amount on the card. Instead, they used a similar technique to the Boston subway hack and restored a previous state to the iButton after something was bought. They also created a hand-held device to backup and restore the contents of a button for portable hacking.