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    Tutorial in using 28x1 to drive a MAX7219 for 8x8 led matrix

    Hi all, I know there are some recommendations for other post regarding these chips, but I cant seem to find anything that helps, or at least that I understand. The clock examples etc that ive found are mainly for using the chips to drive 7 seg 8.-displays. I want to drive a 8x8 matrix...
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    Question regarding software problem (Driving 7 x 5 L.E.D matrix)

    Hi all, Been playing with a LED matrix 7 x 5 My software works ok, but if i make a minor change, It stops working. To start with i issued high / low commands to switch the rows on or of, but decided to change to e.g. let pinsb = %00000001 This worked fine with all but the last line...
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    How to save memory on a multiplexed L.E.D pattern array?

    Hi, Sorry I've been away for a while, but I'm back :) I'm running 20 L.e.d's from a 20M2. the leds are plexed in 4 x 5 array. Leds 1 to 5 on output pins 3 to 7 and the 4 arrays switched on and off using C.0 to C.3 I've made one pattern, but I've nearly used half the memory. I was hoping...
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    Bug in software, please input :)

    Hi all, I've made a little stepper motor controller, to turn a stepper 1 way with button A, and the other with button B... I also have included a battery tester so i can check my 12v battery level by press button C (turns a green, amber or red LED on for 1 second to display health) It...
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    MOSFET Driver - Fan Controller problem.

    Hi Guys, Sorry I do not have a circuit diagram, as I dont generally build from one, but I have a simple circuit that is giving me some troubles.. I have a bank of MOSFETs attached to a heat sink.. I have made a very simple PICAXE board to control the fans when up to temperature.. This all...
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    interrupts This time

    I've had a read though old posts regarding interrupts, but I cant seem to make one work properly.. I'll attach my code for a viewing.. When button is pressed the code starts too loop... (Great) Now I need a Stop/Home button.. (which I thought was easy) And a emergancy stop button...
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    Limit Switches for Robot

    Good morning, I have been building a controller for a robot arm project, and it uses limit switches at each axis move. So I have been if pin = 0 then motor On.. If = 1 then stop motor.. Problem is sometimes it misses, or if i start the robot up after an incomplete cycle it misses the fact...
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    Using 40x1 for the first time - Questions

    40 x 1 Pinout Diagram I modified this diagram - hope thats okay?! Think its correct, colours seem to help me work.. I'm having trouble with the syntax for my code now. if PortA.1 OR if PortA Pin1 OR if PinA.1 ?? and then its different for High / Low commands?
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    Using 40x1 for the first time - Questions

    Hi, First of all a very Happy New Year to all, especially the locals that have helped me out so much last year! I'm thinking of using a 40x1 to control a robotic arm. No problem with the hardware - its the programming I find tricky. Last code I used port b or PinB's for the first...
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    Testing SerOut command?

    Hi all you legends out there :) If I connect my scope to the pins used for programming I can clearly see high and low pulses when I download my program. If I issue a SerOut command to b.6 for example - should i be able to see the SerOut high low data at T9600 on my scope? I'm having trouble...
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    VMusic2 MP3 Player - Cant get it fired up!!

    Hi - Sorry I dont have time to read all the previous, as I'm sure the answer to my problems are there somewhere.. I've just bought a VMusic2 MP3 Player from the picaxe shop.. (thinking it would be simple) I've copy and pasted the sample basic code provided in the shop onto a 18M2.. I've...
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    Problems using Logicator

    I'm trying to use this Logicator, as the old software doesn’t support multi programs. (old software seems much more straight forward) Using the 14M2 chip.. The OUTPUTS icon allows me to use the outputs on the right-hand side 0 to 5, but according to the data sheet I can also use the ones...
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    Not allowed to install Logicator

    Hi, I need to program some 14M2 chips, and I only have the old Picaxe programming software. V5.2.2. I'm not allowed to purchase or install the locator software until it’s been through the ‘system’! I see on the 14M2 the chip is backwardly compatible with codes written for the old 14...
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    Do you know about COSHH??

    Hi all! (Control of substances hazardous to health (COSHH)) Know it’s a bit off topic, but I am currently doing some research into how COSHH has changed the way we work, or tasks we can complete with regard to electronics. If you have any experience you might like to...
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    PIC as 8-bit counter

    I need an 8-bit counter asap, so i thought, Why not use a 18M?? Was thinking if i made a program with 8 stages, B: if pin1 = 1 let pins= 11111110 goto B C: if pin1 = 1 let pins= 11111101 goto C It seems to work, but at slow freqs say 5Hz to 20Hz, it seems to be missing stages?? Is there a...
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    1 x 16 LCD have a go

    Hi, Hope all are well? I'm having a go with the LCD module as explained in pdf 3. Iv gone with method 3, direct connect to PIC as i have 16 pins on it. On the diagram, im a bit confused as to which Pins of the Picaxe to connect it up to? E.G DB6 is pin 12 on my LCD unit, and on the...
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    Flashing X-mass LED's

    I want to introduce some children to the PIC chip, by making some flashing LED light boards.. We have a load of the 18M2 chips, I know we should write our program in code, but i am restricted to using the flow chart system only. This is because of the level of the children + the fact some...
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    How to get a Stable ADC reading from an unstable source!?

    I know this now....
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    Using 08M as PWM driver

    Good day, Im trying to setup a 08M to use as a PWM driver with 8 states of output... As far as i can see, only Pin 5 or Output Pin 2 can be setup as the PWM out? I want to use 3 Input pins to trigger the 8 states.... 3 Bit... 000 = OFF upto 111 = fastest Frequency All seems to be...
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    Keyboard PS2 to Parallel out

    Hi. please bear with me, as im very new to this, and a little confused easily.. I want to use the output pins on my 18M chip to output a 5 or 8bit parallel output.. For the input i'm using a ps2 keyboard I've used the KBin command, and also used the reference table from the keyin.bas...
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