Member #406796

Member Since: February 7, 2013

Country: United States

  • Product DEV-11098 | about 7 months ago

    I am having a problem getting this board to work with Mac OSX. I can not get the tty.USBXXX to show up as a USB modem.

    I have the correct proMini 5V/16MGHZ board selected, but the serial port menu never shows any USB serial ports, only the blue tooth options.

    I have installed the latest correct FTDI drivers for my mac. I even contacted tech support at ftdichip.com and asked them for sure which drivers are the correct ones for my Mac.

    This is my first attempt with an Arduino, so I can’t say if any other Arduino boards would ever work.

    However, googling seems to report many people with the same problem (No tty.USBXXX when Arduino board is plugged in ) and no fixes.

    Does anybody have any suggestions?

    If I go to my About this Mac => System Info => USB no devices show up there either aside from my standard in stalled items.

    I have tried different USB ports and different USB cables. This is a cable I also use to tether my phone so I know the cable works.

    I do also have a Teensy 3.0 that I purchased at the same time. Went through all the install steps there and am having a similar problem. No tty.USB shows up in Arduino app.

    I have a second Mac here on 10.7.5, Exact same results on that mac as well.

  • News - According to Pete - PCB L… | about 7 months ago

    I would like post a question for a future ATP. There are many kinds of opto-isolators, photo-diode, photo-transistor, FET, darlington pair, open collector… etc, there are some high linearity opto-isolators like the LOC11. Can you explain the advantages, pro/con for the different types of optos?

    -Thanks

  • Product DEV-11925 | about 10 months ago

    What if you want to display more then 1 page of information? For example. If I want 1 screen to show analog data, I understand that per the demo video, but If I want to click a button on the screen and go to a second page that shows more of a list or some other display or a second analog display from a different input, can this display handle multiple pages? I didn’t see anything in the quick start but if there is info that I am missing just point me to the docs.

  • News - According to Pete - Curre… | about 10 months ago

    Have you ever used any of the HCNR20X High linearity Opto Couplers and/or do you have any thoughts pro/con on them. http://pdf1.alldatasheet.com/datasheet-pdf/view/64618/HP/HCNR200/+4_529UEMZhDOTB-A+/datasheet.pdf

    Basically they are a matched packaged pair LED and Photo Diode. You will get a 1.6V LED voltage drop on the sense side, and you are limited to about 25ma of current. But it’s pretty accurate for small current sensing applications. They have about a 15% transfer gain so 10mA through the LED = 1.5mA through the photo diode. Then it’s just a matter of connecting the Photodiode to an opamp in some configuration to convert the 1.5mA sense current to a usable voltage.

    I had trouble using the ACS712 with an application that had voltages < 5V and very small currents.

No public wish lists :(