Let's Make Robots!

Picaxe questions

I started with an Arduinno because I read about it in Make Magazine (so very recently). I am considering trying Picaxe, because it seems as though the programming will be easier and I do not have a strong programming background (read: Basic in 1984).

Two quick questions:

  1. In Solarbotics I note a Picaxe 28X1 IC and a Picaxe 28X2 IC Low Voltage. How much difference is there between the two? I note that the normal voltage Picaxe 28X2 IC has been discontinued. (All of this makes me think of a separate question regarding voltage and motors, but I'll hold that for now.) Is there a reason I would get one as opposed to the other>
  2. If I get one of the Picaxe 28s and a project board and a USB Picaxe programming cable, will I have what I need to get started?

I note that the project board has a 9 volt battery snap, but that 9 volts will fry the picaxe. Is that just preverse? Or do they sell more Picaxes that way?

Also, I occasionally hear about BasicStamp ) I think  it is. I have gathered from this site that Picaxe can manage a robot pretty well and has programming that can be grasped by a beginner. Should I be considering BasicStamp as well?

Thanks for any input, opinions and advice!

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 Do u guys know how to hook up sd20 to pic28x1 projectboard?

i hooked it up the way it shown on the manual....then i wrote this:

i2cslave $C2,i2cfast,i2cbyte     

writei2c 1,(1)

wait 1

writei2c 1,(254)

wait 1

but its just not working at all..

Ahem. This is the third post of yours basically asking the same question on diffferent forum topics. That is really not an effective way to use the forums, as any answers you get will be scattered all over. That is bad for you, and worse for people who might be looking for a similar answer in the future.

Try to ask a question once and give folks time to respond.

Sorry about that :).....it's it's an old habit that used to be effective in the old days...:)

I started with Picaxe because most of my previous programming experience had been with basic. Although I do like the picaxe chips I found their version of basic quite hard to use at first because of it limited math and logic capabilities.

No negative numbers, only a handful of bytes that can be used for variables, no floating point math and only the most rudimentry logic capability. The earlier versions of picaxe had extremely limited memory although that's been improved in the newer chips.

By comparison I found the simplified C of the Arduinos dead simple to use and without any limits.

If you want to get into picaxe then download all the manuals from Rev Ed. and READ THEM! Then READ THEM AGAIN! otherwise you will only ask question that are answered in the manuals.

The Picaxe manuals are very thorough.

Thanks for the heads up about the picaxe imitations. From what I've seen people be able to do on this site with Picaxes, I think it will satisfy me for a while. I've downloaded the Picaxe manuals and will try never to ask a question that's answered in them.

If you've found a single source of documentation for the Arduino, please let me know. That is one of the things I find appealing about Picaxe. But most of all, I'm looking for a little more programming simplicity.

Thanks for your feedback.

I bought Getting Started with Arduino, but did not find it as helpful as others apparently have. I have found http://arduino.cc/en/Tutorial/HomePage helpful for learning and http://arduino.cc/en/Reference/HomePage to be useful, but appreciate having a succinct, straight forward source of well organized information. Thanks.

I find this post interesting because I am thinking about ditching my MSP430 Launchpad project for a PICAXE.  The MSP430 is fine and VERY cheap, but all the code seems to be "roll your on".  Just to get a simple servo to wiggle takes the knowledge of a space shuttle SW programmer compared to that of the PICAXE.  The PICAXE just has a better online community for hobbiest.  

I was wanting to get something like this: http://www.solarbotics.com/products/28537/  But, with a USB port.  Can't find that, but I am sure it has to be out there (no RS232 on my PC and those RS232 to USB adaptors always seem flakey).

As far as the SHR, I would like to order one of those, but they seem to be sold out (forever?).

The journey with the MSP430 was fun and interesting.  With the Launchpad so cheap, I have used it to replace the 555 chip on my kitecam and boosted it's quality.  I've sure I'll find a use for my other three Launchpads, but I'm looking forward to spending time building stuff vs spending time just programming the MSP430 from scratch. 

There's a picaxe 28X1 Starter Pack which might fit what you're looking for.



Oddly Solarbotics carries it but is out of stock (they seem to have inventory problems there), but it is in stock and under $50 at HVW Technologies... which is a division of Solarbotics, albeit one with their inventory skills intact.

Yeah I started over a year ago i think and having read the manual i am yet to fry a chip. The 9v battery strap thing was puzzling at first but even the project board manual and on the site i do recall them saying DO NOT USE a 9v. But as all the peeps before me have said this site provides a good reference point for identifying everything you need to know about the PICAXE.

Search for a bot on here call "litte 8" there you will see a 9v being used but the voltage was stepped down using a 5v voltage regulator. All my projects have  similar setup with some modifications I borrowed from the sparkfun tutorial about regulated power supply.