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| PICAXE Comparisons | |
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When the PICAXE first burst onto the scene, it was quite easy to choose which
PICAXE was best for a project, as the range was pretty limited. As the range of available PICAXE's increases, it can be harder to determine which is best for your application, as well as fo your pocket.
General Purpose / Experimentation - PICAXE-28X
The PICAXE-28X has more I/O than the 18, 18A and 18X, more flexible I/O than
the 28 and 28A, and supports programs of around 600 lines in size.
Over-Clocking is officially supported, and the PICAXE-28X offers general purpose
I2C and PC keyboard interfaces, and supports serial interfacing up to 19200
baud. The PICAXE-28X can interface to parallel LCD's with enough I/O left over for
other control purposes, and it can be used to drive up to eight 7-segment LED
displays, or a 64 LED matrix.
Robotics - PICAXE-28X The I2C interface, dual-channel, continuous PWM outputs, and flexible I/O will
often allow the PICAXE-28X to be used as a standalone controller within small
hobby robots, especially as it supports programs of around 600 lines in size.
Simple Control or Interfacing - PICAXE-08M
The PICAXE-08M has a limited number of I/O lines and is not suitable for
controlling parallel LCD's directly, but can be used to control LED, Piezo
Sounders, relay and other devices from serial lines, and in other control
applications. It is the ideal PICAXE for implementing simple PC control of
hardware, with 8MHz operation, continuous PWM, pulse counting, and full
resolution Analogue inputs.
General Purpose Control and Interfacing - PICAXE-18A/18X The PICAXE-18 range offers more I/O lines than the PICAXE-08, and can be used to
control parallel LCD's directly. The PICAXE-18A has twice as much space for
program code as the PICAXE-18 ( is only slightly more expensive, and supports
full 8-bit resolution analogue inputs ), while the PICAXE-18X supports program
sizes of around
600 lines, and offers I2C and PC keyboard interfaces. The PICAXE-18X can be
officially over-clocked to twice the speed of the PICAXE-18 and supports serial
interfacing at up to 9600 baud. Where the PICAXE-18 range does not offer enough I/O lines; the PICAXE-28A and
PICAXE-28X are recommended.
Advanced Interfacing - PICAXE-40X
All prices in GBP and include VAT. Prices correct as of 21st August, 2003;
please visit
www.tech-supplies.co.uk for
latest pricing. [1] Rounded up to nearest whole pence
[1] Individually definable In / Out pins
[1] General Purpose I2C / DS1307 Clock - I2CSLAVE, READI2C, WRITEI2C
[1] The 'maximum' voltage is that which can be sustained for periods without
damage being caused to the device. Operating at or above the 'maximum' voltage
may cause permanent damage to the device.
Although it may be possible to operate below the specified operating voltage
ranges, correct operation is not guaranteed.
[1] Maximum SEROUT Baud Rate without over-clocking
Note that only 4 MHz, 8 MHz and 16 MHz operation is supported. Using other
frequencies will not allow program download from the Programming Editor.
[1] SFR available to user using PEEK and POKE commands
PICAXE is a trademark of Revolution Education Ltd.
These PICAXE pages are produced entirely independantly of Revolution Education
Limited and may not reflect the opinion of Revolution Education Limited or its
agents. The information provided is based upon and derived from information
published by Revolution Education Limited, other sources of PICAXE information
and the author's own experiments and prior experience. The views expressed by
the author do not necessarily represent those of Revolution Education Limited or
its agents. While every effort has been made to ensure that the information on
these PICAXE pages is accurate and correct, the author can accept no
responsibility for any errors or ommissions which do occur. The information
provided is used entirely at your own risk.
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First published on Saturday the 23rd of August, 2003 at 11:45:28
Last upload was on Monday the 23rd of August, 2004 at 00:20:47 |
