Member Since: February 3, 2009

Country: United States

  • CSTCE20M0V53-R0

  • Unfortunately no. A load cell is really just 4 fancy resistors connected in a Wheatstone bridge. They don’t generate any electric current at all.

  • Why is this more expensive as the Arduino Pro Mini 328 for what’s effectively the same thing?

    Mostly because it’s made by Arduino and needs to be shipped from their factory to us before we send it on to you. Every step in the supply chain adds cost to a product. The Pro Mini is made right here at SparkFun so we’re able to charge less for it.

  • A 32u4 would work just as well, and the prototype for this board actually did use a 32u4. As it turns out, the SAMD21 is actually less expensive to use and that’s one of the reasons we went with it over a 32u4. We’re still getting our feet wet with the SAMD21 but expect to see it in more future designs.

    I don’t know if ATMEL is planing on EOL the 32u4 anytime, you’d have to ask them that. I haven’t seen any documentation that hints at it going EOL so it should be safe for the time being.

  • Yes, just click on the ‘Schematic’ link in the product description above.

  • The easiest way to solder this would be to use solder paste and a hot air rework station, but you could hand solder this with a soldering iron if you design your PCB right.

    The pads around the chip could be soldered by hand but the 4 pads in the center are going to be tricky. If I were doing it, I’d put some large vias directly under each pad and then use enough flux to wick the solder through the via and to the underside of the chip.

    If you have a hot air rework station and a soldering iron, this technique would work as well.

  • ——————– Tech Support Tips/Troubleshooting/Common Issues ——————–

    ———————-My kit makes a thumping sound when I turn it on!————————

    Some users have noticed that their amp will oscillate or ‘thump’ when power is applied rather than operate normally. There are usually two causes for this and both are pretty easy to fix.

    The first is that you may not have a power supply that can supply enough current for the kit to work. You need at least a 12 volt power supply that can provide 2.5 amps or more current. Supplies up to 20 volts will work but you still need 2.5 amps or more current to play it safe.

    The second issue that can cause trouble is if you have a lot of flux leftover on the back of the board from soldering. We recommend that you solder all components except for the potentiometers first, then thoroughly clean off any leftover flux from the board. Once the flux is cleaned off, solder the potentiometers and you should be fine.

  • I remember needing to upgrade 8251’s in the mid 80’s to 16450’s and later 16550’s to get more speed!

  • Metal of any kind (including aluminum or plastic that has a metal coating) will block WiFi or any other radio signal. If you put a Photon inside one of these you will need to put an antenna on the outside of the box. An antenna like this one would be easiest to connect, but there are other options.

  • Hello! Send us an email to techsupport@sparkfun.com and we can help get you going with this. :-)

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