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    Soft and hard limits

    Dear all, I'm continuing to work on the magnet follower. One problem I need to tackle is to limit the steering being pushed too far to either end by the stepper motor, because when that happens, most of the time the slider is tightened against the mechanism in a way the stepper motor itself is...
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    ADC5 input, 40X2

    Dear all, Has anyone experienced strange behavior of ADC input 5 (A.5, pin 8) on 40X2? I have strange readings with a regular readadc command and they turn alright if I switch to input 13 (B.5, pin 38) for an example. I tried to use adcsetup command, but that did not change anything either...
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    Line/magnet follower

    Dear all, I have an idea following up my little line follower projects from earlier. I would like to achieve similar functionality using hall sensors and small magnets. I have tested the physical feasibility and I'm now thinking about the algorithms. I have built a 'sensor' from three DRV5053...
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    RC model boat, class project

    Hi all, My latest picaxe challenge below ;). I'm working on a class project we built with kids this year, where the outcome is a little radio controlled fishing boat. We built a number of boats and even had a competition for the school year-end in the local pond. Now, I want to sort out known...
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    PWMOUT OFF problem

    Dear all, I'm trying to invent the wheel (I guess) by building a two-button motor controller. Press FWD button to start the motor in FWD direction slowly and 4 more times for more speed. Then press RWD button to reduce the speed down to zero and to three speeds backwards. Pressing FWD again...
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    HM-16 BLE 4.1 module with picaxe

    Dear all, I successfully created a simple remote control for a model car using iphone, HM-16 BLE 4.1 module and picaxe today. All in all it was pretty simple, but there is lots of time to be saved for someone trying to do this if you know that: *AT commands should not be followed by LF nor...
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    Using Serial Terminal application for debugging bluetooth

    Dear all, I'm toying with HM-16 bluetooth module. I have it paired with an app on the phone and I can serout AT and serin OK back. Seems all good. Now I would like to further explore the module, but doing all of it through serial commands and uploading firmware every time is very time...
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    TLV493D-A1B6 3D Magnetic Sensor

    Dear all, Season's greetings to all! I'm back with another interesting device, TLV493D-A1B6 3D Magnetic Sensor from Infineon. There would be several possible applications for this kind of device in my models - from linear position indicators to smallest servos seen so far if it works the way...
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    Simple circuit protection

    Dear all, I have seen these little devices that look like a capacitor, but are actually circuit protection devices that prevent circuit damage on reverse polarity and over-voltage events. Or so I think. I cannot find much information on how to implement them online, probably because I'm using...
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    Picaxe network

    Dear all, I know the question has been around a million times and there is lots on it in the forum. Exactly because of this, I would be thankful for some educated pointers on what to look for and where to start. I need to set up a network of environmental and some other sensor nodes that would...
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    APA102 experience

    Dear all, I did some work with APA102 based LED strip with 144 LEDs per meter version. All went rather smooth with both HSPI and bit-banged versions after I figured the required end frame is not 4 bytes of $FF, but 8. So 64 set bits. This is true for whatever number of LEDs you use - 1 or 30...
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    Power supply for marine environment

    Dear all, I have a project (one taking me away from the little line follower for a while, but I will be back :)) where I'm designing a system that will be running on a sailing boat. Some sensors, data logging and maybe a display later if the first part of the project proves successful. Because...
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    Comparator tips and tricks from Microchip

    Dear all, While browsing for solutions, I stumbled across this document from Microchip. I find it so interesting, I dare to post it here for general information. Hope you find the solutions proposed useful, too. Edmunds
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    Fixed length pulse train challenge

    Dear all, Here is a challenge. How would you go about generating a fixed number of pulses in the background with picaxe, if you are not allowed to use settimer count? On top of that, both, HPWM and PWM are already used for other functions. Solutions can include external hardware. Preferably...
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    MM7150 - Motion module from Microchip with integrated sensor fusion co-processor

    Dear all, Just sharing what is just in - new sensor fusion hub from Microchip based on Bosch MEMS sensors and likely a Microchip micro. Available with largest retailers at around 25USD. I would expect I2C to be fully compatible with PICAXE as does not seem to be the case with BNO055. The module...
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    BNO055 failure

    BNO055 I2C failure Dear all, I have now soldered the second unit and have not hurried to dip it in epoxy, so I have good access to all the pins. Still - no joy. It is likely, the first unit was also soldered just fine, there is some other problem. I have it connected to the bus that works -...
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    Interrupt on external counter

    Dear all, I know interrupts are not the most favorite topic around here :). Anyway, I have debugged things as far as I could and it still does not work as I expect it to (maybe wrongly), so here is the question. I'm trying to count pulses on C.0 on 40X2 and interrupt on certain number of them...
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    FM24W256 non volatile memory test

    Dear all, Since hand-soldering the aforementioned BNO055 went exactly as expected - one unit down :(, I played with another goodie a little bit to cheer myself up. People have been trying to solve EEPROM durability (dead after about 100.000 to 1.000.000 read/write cycles) and speed issues...
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    Little Sign Follower

    Dear all, While I'm procrastinating with BNO055 intelligent IMU+sensor fusion processor because I know it will be difficult to solder :), I have been busy adding functions to line following. Meet the Sign Follower. The car can now distinguish between 'just a line, business as usual', 'straight...
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    Simple transistor question

    Dear all, Am I right thinking that while NPN transistor switch configuration will reverse the logic (i.e. if I input high, I will get low between the collector and VCC and VCC for low input), two of these buggers i.e. NPN darlington pair should reverse each other and give me a true switch so my...
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