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  • rcomroe01 commented on deba168's instructable Arduino Energy Meter - V2.020 days ago
    Arduino Energy Meter - V2.0

    Nice project. I built my first AC power measurement quite a few years back on PIC. Having built one I was eager to see how you'd built yours. My 1st observation is that you used no current transformer[!] ... instead, using the DC coupled ACS712. Never used one of these ... immediately looked it up to try to weigh pro's & con's over using a current transformer ... may have to experiment! Next, I saw no description of how you measured AC in the Arduino software (I used PIC). I'm looking thru your Arduino sketch right now. In the spirit of sharing, here's a full description of how I built mine ... both hardware and software that can simultaneously monitor the power on every breaker in your entire house.http://comroestudios.com/ScanEngineExplorer/watermonitorwebslides/watermonito...

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    Nice project. I built my first AC power measurement quite a few years back on PIC. Having built one I was eager to see how you'd built yours. My 1st observation is that you used no current transformer[!] ... instead, using the DC coupled ACS712. Never used one of these ... immediately looked it up to try to weigh pro's & con's over using a current transformer ... may have to experiment! Next, I saw no description of how you measured AC in the Arduino software (I used PIC). I'm looking thru your Arduino sketch right now. In the spirit of sharing, here's a full description of how I built mine ... both hardware and software that can simultaneously monitor the power on every breaker in your entire house.http://comroestudios.com/ScanEngineExplorer/watermonitorwebslides/watermonitorlog.pdf

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  • rcomroe01 commented on masteruan's instructable T8 Mini CNC Complete Guide5 months ago
    T8 Mini CNC Complete Guide

    I read others used M3 & M4 for manual spindle enable/disable checkout. Didn't work for me. Using M3 & M4 with the shield REMOVED from the Arduino I probed the outputs where I expected to find SpindleEnable on the Arduino header. I found M3 & M4 changed output ONE PIN OVER from where I expected. Using a VOM I found that this appears on the SHIELD one pin over from the pin labeled SpnEn ... labeled SpnDir on the SHIELD. I moved the relay wire to match and I can now turn on/off my spindle manually with M3 & M4.My Arduino came with grbl 0.9j preloaded. On the GRBL wiki there's people talking about how the Arduino output assigned to SpnEn was changed between 0.8 & 0.9 (a pair of outputs were swapped?). I don't pretend to follow why, as I've just constructed my firs...

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    I read others used M3 & M4 for manual spindle enable/disable checkout. Didn't work for me. Using M3 & M4 with the shield REMOVED from the Arduino I probed the outputs where I expected to find SpindleEnable on the Arduino header. I found M3 & M4 changed output ONE PIN OVER from where I expected. Using a VOM I found that this appears on the SHIELD one pin over from the pin labeled SpnEn ... labeled SpnDir on the SHIELD. I moved the relay wire to match and I can now turn on/off my spindle manually with M3 & M4.My Arduino came with grbl 0.9j preloaded. On the GRBL wiki there's people talking about how the Arduino output assigned to SpnEn was changed between 0.8 & 0.9 (a pair of outputs were swapped?). I don't pretend to follow why, as I've just constructed my first CNC and am no further than trying to verify operation. All (X, Y, Z, and spindle enable) seems to now be working after moving the spindle relay control signal over a pin on the shield.

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  • rcomroe01 commented on masteruan's instructable T8 Mini CNC Complete Guide5 months ago
    T8 Mini CNC Complete Guide

    Are you sure?The Arduino can power through 3 paths: the VIN pin, USB power, or the 2.1mm power jack which is placed directly under the mounting standoff which blocks its use. The shield board does have a mating header post to the Arduino on the VIN pin, but there is no apparent connection on this pin to 12v on the shield PC board. My VOM says there is no 12v connection, and if I disconnect my shield board my VOM says it is an unconnected pin (infinite resistance to the 12v shield connector). If I click the 12v switch "ON" no LEDs on the Arduino light without USB connection, nor does the Arduino return 5v to the shield ... it appears unpowered. It powers only with USB connection to the PC ... LEDs on the Arduino light up, and 5v is returned to the shield for jumper to the cu...

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    Are you sure?The Arduino can power through 3 paths: the VIN pin, USB power, or the 2.1mm power jack which is placed directly under the mounting standoff which blocks its use. The shield board does have a mating header post to the Arduino on the VIN pin, but there is no apparent connection on this pin to 12v on the shield PC board. My VOM says there is no 12v connection, and if I disconnect my shield board my VOM says it is an unconnected pin (infinite resistance to the 12v shield connector). If I click the 12v switch "ON" no LEDs on the Arduino light without USB connection, nor does the Arduino return 5v to the shield ... it appears unpowered. It powers only with USB connection to the PC ... LEDs on the Arduino light up, and 5v is returned to the shield for jumper to the cutter motor relay.If other peoples Arduino LEDs light without USB connection, I could modify my shield PC board by adding a jumper to the VIN pin to the Arduino from the 12v connector. It doesn't appear connected on my shield board.

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  • rcomroe01 made the instructable T8 Mini CNC Complete Guide5 months ago
    T8 Mini CNC Complete Guide

    After construction I used manual grbl commands (G91) to perform manual verification for X, Y, & Z stepper motor controls. I have not yet found the grbl commands to manually verify the cutter motor relay On/Off. Can anyone name the grbl command to manually checkout the Arduino / shield / relay control for the 24V cutter motor?

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  • rcomroe01 made the instructable T8 Mini CNC Complete Guide5 months ago
    T8 Mini CNC Complete Guide

    I put together info from the images and text into my own diagram for electrical connections. I found no reference in image or text to any connections to the Arduino board (other than the mating headers that connect the Arduino and shield together). But your column contains this text:"Remember, the 12 V is for the shield and Arduino"which makes me think I'm missing something ... my 12V does not power the Arduino (it only receives power from the USB connector). What am I missing since the 12V does NOT power my Arduino connected as shown?

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