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Two, three or four with that sir?

Posted by Chris on Tuesday, March 31, 2009
It might sound like a stupid question, but in designing my first robot I've fallen at the first hurdle. I loved the look of the hexapod/spiderbot robots but thought this a little ambitious for my first effort, so decided to stick to a wheeled/tracked 'bot.
Wheels or tracks? Well, I've no plans on going off-roading, so tracks seem to add an unnecessary layer of complexity, so wheels it is. But how many?
Two is obviously simple, with a third, non-powered castor for stability. But more and more I like the look of the three wheeled omnibot.
Just think about that for a minute. Three wheels - arranged in a triangle.
At first, it seems like a stupid idea because two driven wheels will always be dragging the third wheel. And dragging equals resistance which equals extra (unnecessary) load on the motors which means shorter battery life. That is until you've seen how a transwheel works.

These clever little wheel has a series of rollers running perpendicular to the axle around the outside, allowing it to be moved in any direction as well as to provide drive like a "normal" wheel.
So you can have three wheels all at 60 degrees to each other and by changing the speed of rotation on each wheel, have a robot move in any direction without turning to face that direction. Some of the cool kids call it "strafing".

So should I have a simple two-wheeled robot, which is easy to understand and drive? Or a three-wheeled robot which would be incredibly cool but quite tricky to get working from a single microchip controller? The obvious answer is to go with a four-wheeled 'bot using the transwheels (also called omniwheels on some sites).
This would give the simple controlability of a two-wheeled 'bot and the super-cool factor of an omin-directional (three-wheeled) 'bot.

As ever it comes down to cost and complexity. Three driven wheels are obviously cheaper to implement than four, but the level of complexity increases.
A bit more research is needed, and will be posted here as and when time allows....


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Die humans die!

Posted by Chris on Sunday, March 29, 2009

Since attending the brilliant Brighton Robot Hack Night, ideas for taking over the world with a miniature robot army have never been far away. From what I learned on Thursday, they wouldn't be particularly threatening (we didn't have time to cover laser guns or making miniature atomic explosive devices) but there would be no danger of them bumping into anything as we made our march on world domination. I seem to be getting confused between Robot Hack Night and the plot of a book I'm reading at the moment. Seeing all the different ideas has got me thinking and the end result was the launch of (yet another) project which will be documented here.

When building robots, there seem to be two main questions: motion and sensors.
Will it be a robot with wheels/tracks or legs? I quite like the look of the hexapods but they're incredibly complicated for a beginner, so I'll stick to the (simpler) wheeled version.
Next you need to decide what time of intelligence and sensing to use - on Thursday we investigated using antennae to detect when the robot had hit an object, then made it back-up a bit, turn a random direction, then set off again. Another common type of robot is the "line follower" where an infrared beam is bounced off a black line and the robot adjusts it's direction to stay above it.

Whatever sensory method is used, the basic premise of my robot will be a wheeled device with two independently driven wheels (turning both at the same velocity causes the robot to travel forwards and backwards whereas forcing the wheels to turn in opposite directions causes the robot to turn). As this could form the basis of a number of similar "critters" it will form the basis of the next robot project.
See the http://www.nerdclub.co.uk/projects/project.asp?id=ROBOTBASE

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They think it's all over....

Posted by Chris on Friday, March 27, 2009
...it is now.
Less than three weeks old and already my first missed blog post. Holy Crap!
According to the Bloggers Guide to Blogging, my blog is now deprived of readership and doomed to obscurity. The last few weeks disappear as if they've never happened, the earth will open up and Armageddon has already started.

Oh. How disappointing.
Nothing happened.

Well, nothing happened because of the missed blog post. Something was very much happening yesterday - and that's why there was no news: not because nothing was happening, but because so much was happening there was no time to scurry back and type it all up.

First up, the matinee performance of Waiting for Godot, starring Gandalf and Jean-Luc (Ian McKellen and Patrick Stewart to the high-brow readers). Let's not forget Simon Callow, who would normally be a headline act in his own right - but happy to play second fiddle to these two giants of both screen and stage.
I didn't know much about the play - except I'd been told the spoiler ending many years ago on the odd occasion I attended an English Literature class (Godot never turns up) and that a lot of "grown ups" think it's boring.
To be honest, a theatre performance with three of the biggest RSC actors around sounded like a nightmare mix of luvviness and backslapping, but it's not every day you get see Gandalf and Jean-Luc live on stage!

What a fantastic performance: Ian McKellen was absolutely natural, Patrick Stewart was incredible and even Simon Callow failed to ham it up (too much) although he very impressively can turn his face purple almost at will. The play was much funnier that I'd expected - even the star turns had to check themselves to stop giggling every now and again. A brilliant performance. It's a shame it's sold out in Brighton - if there were any spare tickets, I'd be straight back in line to buy some more!

Straight after the theatre, there was only an hour to stuff some dinner down then get back on my bike and head off to the Brighton Robot Hack Night at The Skiff.
The turnout was very good and everyone was really enthusiastic about Steve's robot kit. Despite a few mishaps with the superglue (part of the hack was to modify some servos and a few people found that being over-liberal with the glue didn't exactly help to make their wheels go round!) it didn't take long for a few bumper robots to start scuttling around, in-between feet and chairs and coats and bags.

Downstairs, a league game of "shoot-the-bot-up-the-arse" broke out and players were invited to blast a poor defenceless robot up the back end, not just once but three times, and times were recorded in a league table. Despite never having used an air-pump gun before, I thought that my time of 140-odd seconds wasn't too bad. But I hadn't banked on the awesome might of Geek Girls With Guns.
Emily managed an incredible 24 seconds and as she went upstairs to gloat, Julie took to the hot seat and obliterated what looked like was going to be the record for the night, with a staggering score of just 17 seconds.

There wasn't quite the time left over at the end for letting all the new bots loose what had become the play area, downstairs, but as 11pm rolled along and people had to start making their way home, everyone was agreed that it had been a really good night. Personally, I'm already looking forward to the next one in about four weeks time.
Who knows - my PIC programmer might have even arrived by then!

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Free toolkit (ok, it costs a quid)

Posted by Chris on Wednesday, March 25, 2009
Since moving down south and having to start paying rent again, I've been on a bit of an economy drive: and that means checking out Martin Lewis' Restaurant deals, filling in the coupons from the papers and becoming an avid follower of FreeCycle.
But here's a deal that I thought would appeal to like-minded techies: a free toolkit from PC Pro. It's an ideal starter set (I've been re-buying all my old kit from Maplin so this have saved me a few quid) with screwdrivers, snippers, tweezers and all that.

I don't usually plug this kind of thing, but since I just received mine in the post I thought I'd share it with anyone else out there, reading this drivel:

https://secure.widearea.co.uk/dennis/campaigns/6169/SUDD.html

Complete the subscription page, and agree to receive three copies of PC Pro.
One pound is immediately debited from your account, but the DD is for about twenty quid. You have three months grace, to try the magazines and cancel if you like (the idea being that you forget to cancel before your fourth magazine arrives and then you shout d'oh and it's too late).
The toolkit is yours to keep, whether you take the magazine or not.
When your toolkit arrives, cancel the direct debit (which I did this morning through online banking: I haven't seen a single magazine yet, but the toolkit is here in my kitchen, so it all worked out in the end!)

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So that's why nothing ever gets finished

Posted by Chris on Tuesday, March 24, 2009
While waiting for my PIC programmer, I fell back onto a couple of ideas I've been kicking around for a while and decided it was time to do something about them. I have loads of half-finished projects kicking around and have never actually got close to finishing any of them.
Well, ok, a few years ago I completed an Everyone's a Wally remake (in Flash 5 no less) but I only managed to complete it because it was for a competition and the deadline was looming!

Maybe that's the problem with being a one-man-band.
There's never anyone on your shoulder, nagging or pushing you for a completed product. There's always tomorrow. There's always something else new and interesting and exciting to get involved with - like most nerdy people I know, once I've worked out how something works, it's time to move on.
And so the Nerd Club was born: with luck, getting a few different people involved will mean that different aspects of each project will appeal to different people. And there's probably a 1/1000 chance that something might actually get finished! But it's odds-on that more things will get started....

Which brings me onto this post: I've started another project.
Not picked one up that was flagging a few months ago and decided to breathe some new life into it, but start an entirely new idea. I'm writing an online game. It's going to be not just the biggest and best online game, but the best community/league game too (aren't they all?).

It's a mix between two of the best games of all time, blending the skill and strategy of (ZX Spectrum classic) Laser Squad with the brutal sports board game Blood Bowl. It doesn't have a title yet, but will basically be a football/fighting type game, "borrowing" the mechanics of the brilliant Laser Squad. In fact, it'll probably end up being the game that I hoped the new Blood Bowl video game would be.

(but written in Flash so you can play it in a browser)
Check out the projects page on the Nerd Club main site

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See yourself as others see you

Posted by Chris on Monday, March 23, 2009
Another revelation today (while not actually getting much work done).
I have no idea how other people see me. I have finally decided that I'm a bit nerdy and came to this conclusion because I spend too long becoming expert in any subject that takes my interest. I can be quite boring to talk to (unless talking to another nerdy person, and then you should see the sparks fly!) and I'm not exactly the life and soul of any party. I'm also pretty conscientious and like to see a job done properly.

So if you're familiar with the Dilbert Cartoons you'll understand how distressing it is to be miscast as any of the major characters.




I work in an IT department (surprise surprise) with a guy who is devilishly clever at avoiding work - in fact, he puts more effort into not working than if he just did the job in the first place! Let's call him Wally.
Then there's the management layer, one in particular who comes up will all manner of crazy and clueless schemes. She will come up with a half-baked idea and - not understanding what is involved - decides it must be simple to implement and sets an impossible deadline. Let's call her a pointy-haired-boss (PHB) - ok the gender is not quite accurate but bear with me.

I was a little too slow clicking the minimize button the other day, just as said manager walked in - she too was a Dilbert fan and identified with the same characters. But she got it totally messed up! In her mind, she was Wally (but in a "aren't-I-clever-pulling-this-being-lazy-stunt" way) while my Wally-like colleague had become the hapless and put-upon Dilbert but the killer was that I'D BECOME THE PHB!! She figured that I was the one who didn't know what was going on because I couldn't decipher what on earth she was talking about most of the time and that made me the dumb one.

I had to go for a lie down.
If everyone who reads Dilbert cartoons associates all the wrong characters to the wrong workmates, who the hell is who? And more importantly, who the hell am I??

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Nearly lost in the buzz of noise

Posted by Chris on Monday, March 23, 2009
I started this blog about a fortnight ago, and was determined to post to it every day. Why? Because the blog experts and website SEO gurus all said I should. If I don't make a post every single day, my blog will wither and die and no-one will ever find it. Ever.

And for a while, I went along with it. I started reading other technology-based blogs and noticed that their authors posted every day too. Then I noticed that for every post on most of these blogs, there were only actually one or two articles a week that were of interest. The rest of the time, there were just posts, linking to someone else's blog - someone else's work. And then I started thinking "perhaps I've picked the wrong blog to follow here, perhaps I should stick with this one (where all the content is coming from anyway)".

Tonight I very nearly fell into the same trap.
I know that I have to post every single day otherwise "master-blogger" alter-ego will turn back into Clark Kent and all the work I've put in to my blog to date would be worth less than a quarter share in HBOS. So I thought I'd just put a load of links to stuff I've been reading about and be done with it. After all, who would ever know? Everyone is doing it anyway.

And then it dawned on me that this is exactly what everyone IS doing.
Not just online diary-junkies, but bona-fida journalists and news reporters. Commentators on Match of the Day, weathermen and news anchors. It's on the telly, on the radio and all over the newspapers: people looking to fill column inches and dead air. It doesn't matter what the message it - just keep making a noise to fill the void. So for that, dear reader, I am truly sorry.

I promise that future posts will actually be - if not interesting to all - relevant. No more filling the gaps with noise. No more twittering when there's nothing much to say. And no more posts like this one. So hopefully you won't get fed up and move onto another blog, but stick with this and find the odd nugget of information or topic of interest.

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Tell me why I don't like Sundays

Posted by Chris on Sunday, March 22, 2009
Not since "Wild at Heart" finished last week ;-)
In fact, Sunday stinks not because of the tv schedules but because there's no post on a Sunday. So there's zero chance of my PIC programmer arriving.

On a sunnier note, the weather down here on the south coast has been fabulous so I've been trying out another skin: that of one of the cool kids, sitting on the seafront, reading a book and sipping capa-frapa-cinos. I haven't quite mastered the nonchalant appearance of one at peace with the sun and sea breeze (I have to keep pushing my fringe out of my eyes) and my attempt at fitting in with the eco-concerned cyclists fell flat as I got one trouser leg completely covered in chain oil (I've only had a bike for a few weeks and we're still getting used to each other).
And if all that wasn't enough, my choice of book was akin to wearing a bright neon badge with "member of the Nerd Club" written across it.
King Dork is quite a funny book. But worryingly, if anyone catches you chuckling as you read, they need only take one look at the title to work out that you're laughing along in a "I recognise that" way and give you a knowing look.

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Stepping out into the big wide world

Posted by Chris on Saturday, March 21, 2009
Just a quick post, in case anyone else lives locally and is attending the Brighton Robot Hack Night (Thursday 26th March). It'll be my first night but already I'm getting a bit excited.



See http://robotbrighton.ning.com/ for more details.

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And now for something (completely?) different...

Posted by Chris on Saturday, March 21, 2009
I'm still waiting for my PIC programmer so can't really go much further with my USB-to-serial project. I've got the components wired up, I've looped the TX/RX pins on the FT232RL chip together and sent some data using Hyper Terminal. And, as expected, I get the same load of jibberish sent right back! So the USB-serial bit appears to be working.

The next stage will be to actually send the data to the PIC - making sure that the baud rate between the FT232RL and the 16F628A are correct, and that the data from the FTDI chip isn't getting scrambled on it's way to/from the PIC (I've read on few forums that this is a common problem!).

So while I'm (still) in limbo regarding the PIC I've turned my attention elsewhere.
My next project will involve a switching power supply - the kind of thing used in the fantastic Wizards of Winter video from a few years back. I've got the circuit components, transistors, relays and even a couple of SSRs (solid state relays) and the schematics designed but without the PIC programmer, it's not going to go much further!
In the meantime, I've been working on a sound to light application to support the hardware.



Knowing how it works (or how it should work once it's been built) makes writing the software actually quite difficult: I'm trying to make it super-user-friendly - just look at the interface and you should know how it works.
Well, here's a screenshot. I can't decide.....

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There's nothing on the telly

Posted by Chris on Friday, March 20, 2009
So why not watch the interweb instead?
Here are some links to nerdy videos and podcasts.

http://www.youtube.com/watch?v=urv6jArKp6M
http://www.youtube.com/watch?v=t06malVew40
http://www.youtube.com/watch?v=wQXhny3R7lk&NR=1
http://www.youtube.com/watch?v=3g-yrjh58ms
http://www.youtube.com/watch?v=FpOwONezb3c
http://www.youtube.com/watch?v=4dneLQY6ZVk

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Still waiting for PIC programmer

Posted by Chris on Friday, March 20, 2009
While waiting for my PIC programmer to turn up, I've been searching other blogs, particularly those in my area. I came across the robotbrighton club and can't wait for their next meeting! There's a lot of emphasis in the robotics world on the Arduino controller circuit board, so some investigation is required there: in the meantime, I've been browsing videos from robotbrighton contributors, such as this one - a voice controlled Dalek!.
Even if you're not in the least bit nerdy, you've got to admit that this is pretty cool!

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It's the little things that matter....

Posted by Chris on Thursday, March 19, 2009
Despite risking wiping out my FT232RL chip with some dodgy wiring, I decided to "go for it" and downloaded MProg from the FTDI website. It's a simple little utility which reads (and writes) the internal EEPROM on the FT232 chip.

It seemed to read the chip ok, returning the unique serial number, power settings and VID/PID combination. So I figured that the wiring must be ok if it can read the EEPROM - so why not try writing to it?

All I changed was the name of the device descriptor and left everything else as I found it. Then I unplugged the USB cable at the PC, gave the computer a few seconds to re-evaluate all the connected devices and plugged it back in.


Now you can even give your devices whatever name you like!

Suddenly the idea of creating my own PC peripheral devices doesn't seem to pie-in-the-sky after all. My PC says it likes my USB devices! And it knows what they're called. That's like when the girl/guy you've had your eye on for weeks suddenly turns around and addresses you by name....awesome!

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....go!

Posted by Chris on Wednesday, March 18, 2009
Exciting stuff this PC device building. I soldered a few wires onto a bit of copper strip board and built a portable USB socket (it's in the photo on the right) so I can re-use it on different projects in future. I've not waved a soldering iron around for a few years, so the joints were good and blobby - like a high-school design and technology project!
I put a 9k resistor and 3mm LED in series across what was to become the +5v and 0v rails and plugged the USB cable in.
Nothing.
D'oh.
I plugged the other end of the cable into the PC.


A simple LED tells us that something is getting power...

The LED came on (yay!) but Windows said that there had been a malfunction in the USB device and it was not recognised (boo). I downloaded the latest virtual com port drivers from the FTDI website and installed them. I double-checked the USB signal wires (which I've coloured yellow and blue) and found I'd got them the wrong way around. After flipping them over this suddenly appeared:


Yay! Windows recognises my new device

Apparently you can use an application from the FTDI website to change the descriptors so that it displays your actual device name, but I was just thrilled to see this message:


Windows says "bring it on, I can talk to your new device"

That's right - installed and ready to use! Wow.
Except it's not really: I haven't programmed the PIC yet. But knowing that I got the simple USB-serial interface working is good enough for one day. And the Chinese buffet (that I bought with the money I'd saved building my own board) was fabulous...

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On your marks, get set....

Posted by Chris on Tuesday, March 17, 2009
A quick trip to Maplins in Brighton and £12.45 later, and I think I've got everything I need to build my first USB-to-serial device. Well, not quite: I'm still waiting for my programmer to be delivered from Hong Kong, but there's no reason why I can't get on with the electrical layout and trying out the FTDI drivers and so on. Even without programming the PIC micro, it'll be interesting to see a response from the PC, recognising a new USB device as it is plugged in.

I'm making a breakout board for the FT232 chip at the moment: you can buy them complete for about £20. But the chip itself is only about £3, a single chip on its own DIP breakout board costs £6 and a B-type USB socket £1.30
It was tempting to just buy an evaluation board, ready built, for twenty quid. But then I thought I could probably build the same thing myself for half the cost and blow the difference on an all-you-can-eat Chinese buffet instead!

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PIC programming made easy

Posted by Chris on Monday, March 16, 2009
I've been getting back into PIC programming and have been reviewing some of the assembly code I wrote for an earlier (chicken counter) project. It took a few hours just to understand what on earth was going on! So I decided that however clever it might be to write in assembly, it would take forever to code, test, compile, test, debug, fix, compile, test (ad infinitum) each version of the microcontroller code. There's nothing for it, I'm going to have to use a compiler.

Compilers come in a variety of flavours, but the most common ones are for C and for Basic. Having been working in C for a few years, this was my initial choice. But then I found this website: http://www.oshonsoft.com

The PIC simulator IDE is more than just a BASIC compiler (it's a pretty good one at that!). As it's name suggests, it also provides a virtual PIC simulator. So even after your code has been compiled, you can step through it and monitor exactly which line in your code the CPU is up to.

The syntax is really easy to use and all the complicated stuff like serial communications is encapsulated into a couple of commands. Usually I spend ages trying out demo versions of different software, registering it (ok I admit it, often re-registering under a new username/email address/fresh installation) then trying to find ways around the limitations (it's amazing the number of fully functional demos that can be used beyond a 30-day trial just by changing your PC clock!)
PIC simulator IDE was a different thing altogether - after just two days I knew that this was the package for me. So I stumped up about £25 and bought the full version.
PIC Simulator IDE by OshonSoft

I've already got a few hex files compiled and tested in the simulator. Now I'm just waiting for my new programmer to arrive from eBay and I can download the code onto the actual device and start seeing those flashing lights!

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Create your own USB devices

Posted by Chris on Monday, March 16, 2009
I know the first few posts on this blog have been a bit technical, and mostly electronics based, but I'm looking to build a number of computer controlled devices. Back in the good old days you could hook up a cable to your serial port and send a few commands via DOS and hey presto! Your own working PC peripheral device.
Things are not quite so simple these days, as most modern PCs and laptops have forgotten all about the humble 9-pin serial port and have opted for loads of USB hubs all over the place.

So the first step in any PC device project is going to be getting the instructions from your computer to the device (and back again). So I'm off to Maplin to investigate the FTDI chip. This basically creates a virtual COM port on your computer and converts all the tricky USB stuff into nice simple, easy-to-use serial data.
And since most mid-range PIC micros have built in USART (serial buffers) getting the data in and out of the microcontroller should be a doddle.....

If you're interested, have a look at the USB basics page on the main Nerb Club website. There are a few of us working on this one, so first to crack the FT232RL chip gets to post about it!

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Getting started with electronics

Posted by Chris on Sunday, March 15, 2009
I've been playing about with PIC microcontrollers for quite some time now and have produced a few hobby-level projects (although the last actually had an application, it was a automated chicken counter and door controller).
I'm currently working on an idea which I hope will prove popular enough to sell a few units: nothing particularly ground-breaking or revolutionary, but an idea that a few other people have expressed an interest in and I think will be of use to a few more. More information will be posted here as it becomes available.
Download FREE schematic and PCB layout software

Anyway, because this will be more than a one-off, I'm having to give serious thought to volume production (volume as in more than one, perhaps half a dozen or so) and how to advance from the "works-on-a-breadboard" prototype to making something that can be repeated a few times over. That means printed circuit boards.

I found this website http://www.expresspcb.com where you can download FREE schematic software and PCB layout software. You can even link the two, so that as you design your PCB layout, it will highlight which pins and terminals need to be joined together. I don't know much about the software yet, but have used it to sketch out some simple circuits. It's a bit clunky to use, but if you've even had to use something like AutoCAD for your schematic drawings, you'll appreciate the clever little extras that have gone into this application.

If you're thinking of any kind of electronics project, whether for breadboard prototyping or a finished printed circuit board, it might just be worth visiting the site and trying their software. I've used a lot worse. I tried writing my own, which was nowhere near as good. In fact it's not bad at all....

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Write better code - play games

Posted by Chris on Saturday, March 14, 2009
I recently spent some time learning how to write code for Microchip's PIC microcontrollers. It's pretty nerdy (especially when you have to understand bit-masking to decipher their datasheets) and quite a complicated process. I jumped straight in with both feet, bypassing the high-level compilers out there which convert C and even BASIC into hex files, and stared writing in assembly.
FatBob

Crazy I know, but I'm just a wacky kind of guy. 
Seriously, check out my tie, it's got cartoon characters on it and everything.

PIC micros actually have very few instructions - just 35 commands.
On the face of it, they should be quite easy to use. But they're not.
Writing code for them should be quite simple too, but it's not. The reason it's so complicated is because you have to work within such a tight framework. You get a handful of commands, a few kilobytes of memory (4kb if you're lucky, most likely two) and you have to load variables in and out of the maths register, manually, to do even the simplest of things.

Writing code for a PIC micro can be frustratingly difficult because you can only do one of a handful of things at any one time. But this doesn't mean it can't be fun.
After all, when playing any type of game, at any one time, there are a finite number of things you can do: 
For example, check, fold or raise (poker)
Move a token or play a card (monopoly)
Roll the dice or make a suggestion (cluedo)

Yet the fun behind any game is exactly because of the rules you're bound by. And people still love to play games - in fact, the more creative you can be, within the rules of the game, the more enjoyable it can be (try sticking the ball up your jumper in a game of rugby, there's nothing in the rules says you can't).
The same is true of doing uber-nerdy stuff, like writing code.
The more creative you can be, within the confines of the limits of the language you're working in, the more impressive the results will be.

So next time you're faced with learning a new language, don't moan about what it can't do, and complain about your lack of resources. Try looking for what it doesn't stop you doing - and then the only thing limiting you will be your imagination!

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Hello

Posted by Chris on Saturday, March 14, 2009
Hello everyone. My name is Bob and I'm a nerd.
I like things that other people think are nerdy. I like messing about with computers and technology, electronic gadgets and playing board games. I like making things and putting ideas into practice. That's what this blog is all about - the very thing that separates us nerds from normal folk: putting ideas into practice.
FatBob

It's easy to dismiss an idea as too dumb, too uninteresting or too difficult. It's also very easy to start putting an idea into practice then get bored, hit a brick wall, or simply find something else that becomes all-absorbing. It's easy to start on something then find that it needs some input from somewhere else: either a new set of skills or just a fresh pair of eyes.

The idea behind Nerd Club is to build a forum for ideas where people can swap ideas and skills, to get involved in each other's projects and to help build a community of contributors who collectively can make a few projects successful.
You don't have to be a super-nerd to get involved. You don't need to pass an initiation test, write perfect code, understand what a decoupling capacitor is for, or to be able to differentiate quadratic equations. All our members are simply enthusiastic about what they do.

If you find anything here that takes your fancy and think you can help, in whatever capacity, drop us a line. It doesn't have to be technically demanding. You might fancy designing some artwork for an online video game. You might spot an opening in a market for something that someone else has developed or come up with an improvement or just a different way of looking at something.
Whatever you've seen, don't just pass us by - drop us a line and get involved!


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