Recent content by testerrrs

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    Variable PWM Motor Control

    Hi all, I've got a 28X1 running off a 5V regulated supply. I have two 9-12V DC motors with their respective gearboxes. I also have two smallish bipolar stepper motors. Firstly, for a small line following robot I'm guessing DC is the way to go? Would you agree? Secondly, what's the best way to...
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    Line Follower that can learn

    Hi all, Thinking of trying this out as a project and wanted to run it past everyone here to see what people think and if anyone has any suggestions or ideas. Basically I'm going for an LDR style black-line-on-white line follower. However I want it to learn the track the more times it goes...
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    Calling a PHP Script

    Hi all, I have a PICAXE connected to a weather station system, and it grabs data into variables. Now I've written a PHP script that is called as follows: add.php?light=XXX&moisture=XX&temp=XXX&password=XYZ etc, and it adds the data to a MySQL database. I know the PICAXE can compile the string...
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    Altitude Datalogger Update

    For all the guys on here who helped me with this (thanks a lot!) here is where I have got so far. Information on the circuit and how I built it. First (and only, so far) result at the bottom: http://hexoc.com/altimeter/index.htm Pictures of the transmitter module and captions/comments...
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    Self-controlled power

    Evening all, Whilst playing around with some bits for my altimeter project, I decided it would be a good idea if the PICAXE, once finished logging, could power itself and the rest of the circuitry down completely, or as completely as possible. After coming up with the following two ideas for...
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    Altimeter Datalogger (part 2)

    I thought I'd start a new thread, as the questions I have now and results I'm getting aren't related to the previous thread's title. Now, the sensor is acting a little strangely and I wonder if anyone can shed some light. The power supply is a 9V battery running a 5V regulator, actual supply...
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    Signal Conditioning

    Hi all, First of all, I'm looking to build a small altitude datalogger to attach to a model rocket. I'm using the Motorola MPX4115 Pressure Sensor. I've got the system worked out I reckon, apart from the signal conditioning. Moving from 0ft to around 5000ft, the output voltage of the MPX4115...
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    Ultrasonic Range Finder

    Whilst the SRF005 is a very nicely built module, I wanted to build a system myself. The system is based on the one outlined on this page: http://www.siliconchip.com.au/cms/A_103243/article.html However I have customised the circuit. Input amplification means the system has a range of more than...
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    Voltage causes erratic behaviour

    I have two 08M PICAXE chips running from a single 9V supply through a 78L05 regulator. This regulator should supply a constant 5V supply as long as input voltage remains above 7V. Both PICs are running at 8mhz. There is a 10uF and 220nF capacitor across the 9V supply and a 100nF and 10uF...
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    US Transducer Information

    Hi all, Thought I'd make another thread as this is a slight side-question on the other one. In short, I'm using the ultrasonic transducers shown below: Do these have polarity? If so, which is which? I've tried searching for a spec sheet, but I can't seem to find this info. Thanks, Jon
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    Ultrasonic Lag Timing

    I'm using this circuit shown on this page: http://www.leang.com/robotics/info/articles/minison/minison.html. With the Ultrasonic timing diagram looking like this: I would like to attach this to a PICAXE so I can determine the "Time Of Flight", therefore allowing me to create a distance...
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    PICAXE Altitude Datalogger

    Hi all, I'm looking at using a "Motorola altitude sensor - MPX4115" along with the readadc10 command on a PICAXE-18X IC to measure the highest altitude reached by the device. Has anyone got any suggestions or help on how I should go about doing this? How can I get the maximum...
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    18X Compile Error?

    I'm using the line of code: if b0!=0 then gosub function1 Which is shown in the BASIC commands sheet as a correct command. However when I try to download the program, the compiler returns "Error in this line". Why? TIA, Jon
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