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  • barduinor made the instructable HackerBoxes 0018: Circuit Circus3 weeks ago
    HackerBoxes 0018: Circuit Circus

    Cool build.Anyone sharing a box for 3d print?

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  • barduinor commented on HackerBoxes's instructable HackerBoxes 0017: Power Maker1 month ago
    HackerBoxes 0017: Power Maker

    Here are the files.Both STL and the SketchUp, enjoyCheers

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  • barduinor made the instructable HackerBoxes 0017: Power Maker1 month ago
    HackerBoxes 0017: Power Maker

    Almost done. waiting for the lid to print...A couple of changes to the HackBoxes exercise.Included 2 leds, one to the gray wire, the other to purple, representing standby and power on.I noticed that using a single 10k potentiometer is almost impossible to get the precise voltage. My solution to this was to include another potentiometer of 1k connected in series to the 10k for fine tuning. This way I can select an approximate voltage and then fine tune it with the second dial.I did not use the blue wire, can't figure out the use for -12v, so the red lower post on the far right should be black since it's actually ground.Another possible modification for this build, maybe a future enhancement, is to use a step up + buck converter with current control and a display that has amperes. When I ...see more »Almost done. waiting for the lid to print...A couple of changes to the HackBoxes exercise.Included 2 leds, one to the gray wire, the other to purple, representing standby and power on.I noticed that using a single 10k potentiometer is almost impossible to get the precise voltage. My solution to this was to include another potentiometer of 1k connected in series to the 10k for fine tuning. This way I can select an approximate voltage and then fine tune it with the second dial.I did not use the blue wire, can't figure out the use for -12v, so the red lower post on the far right should be black since it's actually ground.Another possible modification for this build, maybe a future enhancement, is to use a step up + buck converter with current control and a display that has amperes. When I toasted my buck+step I couldn't find a suitable one and ended up abandoning the idea. If anyone can suggest one, please do.All in all, this is a fantastic box, so far completed the PSU and the charging bank (w/ a 3d printed box as suggested here).About the PSU issues that some of us have been experiencing.All my power cables come from drive connectors. From the main board connector, I used the brown (3.3 regulator), green (power switch), gray and purple for leds. All the others are nicely tucked away inside the PSU itself.No resistor was used.My 3D enclosure is a bit scruffy looking, the walls are too thin and the circles contribute to a flimsy structure. However, if anyone is interested in the design as a starting point, I'll gladly upload the sketch file.For this community, thanks for all the help and tipsCheers

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  • barduinor commented on HackerBoxes's instructable HackerBoxes 0017: Power Maker1 month ago
    HackerBoxes 0017: Power Maker

    This is interesting.In my case, I used the cables from the drive's connectors, I get 3.3, 5 and 12 v (I use the brown cable to the 3.3).So most of the cables on the motherboard connector are still there.The fan spins and I have no resistor shorting 5v. The ground and the power switch (green to black) is working.I have not tested with load though just volt meter.However, when trying to install the buck converter the potentiometer is bad, on the left pin I have no current at all and on the right pin the resistance fluctuates a lot and the potentiometer works randomly, (I get 53v max).In the meantime, I think I fried it, I accidentally reverse the polarity using a 3.7 v battery. Does anyone know if this buck converter has any protection?

    Here are some pics to illustrate what I mean

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  • barduinor commented on HackerBoxes's instructable HackerBoxes 0013: Autosport2 months ago
    HackerBoxes 0013: Autosport

    Example using the joystick in blynk, much nicer to control

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  • barduinor made the instructable HackerBoxes 0013: Autosport2 months ago
    HackerBoxes 0013: Autosport

    Done it!!!Some notes:From the original .ino replace the quotes with normal ones so it compilesOne of the motors is reversed so switch polarityTo get the Blynk app running point the buttons to the proper Vn pinsCant wait to explore playing with power/acceleration of this motor sheild

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