SparkFun Electronics Commentsurn:uuid:214d0e4e-f1b1-d287-ce26-ac5b4c9f82492024-03-29T02:18:29-06:00SparkFun ElectronicsRed Squirrel on SPX-15296 - SparkFun BlackBoard CRed Squirrelurn:uuid:6855101e-f034-14d9-4a60-93a67e604a802021-07-01T20:49:55-06:00<p><3</p>
Nate on SPX-15296 - SparkFun BlackBoard CNateurn:uuid:9e4740b7-a91e-dab4-592b-117d4a9dac792020-03-04T10:10:41-07:00<p><a href="https://www.sparkfun.com/products/16282" rel="nofollow">Posted</a></p>
Nate on SPX-15296 - SparkFun BlackBoard CNateurn:uuid:0cb4d87a-f3ab-5092-449e-62a124d5f8532019-11-01T20:09:55-06:00<p>This will help other users. Up voting. Thanks for reporting!</p>
Customer #1338166 on SPX-15296 - SparkFun BlackBoard CCustomer #1338166urn:uuid:6a5a98f7-48df-4458-d032-0b7c739271e52019-10-31T21:31:58-06:00<p>Took me a while to figure out why my Vernier sensors (using Vernier shield) weren't auto id-ing with the Blackboard. Turns out the auto id uses A4/A5 and those pins have 2.2 k pull up resistors, and this throws off the id voltages that the VernierLib uses to id a sensor. I'll need to cut the jumpers as discussed in the description.</p>
Nate on SPX-15296 - SparkFun BlackBoard CNateurn:uuid:3cf1a125-d43b-861b-6e17-2cefda652b522019-09-20T13:28:08-06:00<p>I've got some nits with your points but overall you make a convincing argument (thanks!). I agree with you. I'll put a switch on the next version.</p>
Red Squirrel on SPX-15296 - SparkFun BlackBoard CRed Squirrelurn:uuid:4a358e41-801e-ff0a-144b-b1c655dd58042019-09-17T18:49:12-06:00<p>Currently, my only other idea is a jumper cap on a 3pin 90degree header (bigger but easier)<p>0) If you are worried about bumping the slide switch, have you considered the possibility of bumping the jumper with something conductive like a screwdriver so as to briefly connect the 5V pad?</p><p>1) Bumping a slide switch is one of the <em>harder</em> ways to send 5V to 3.3V electronics, given that USB/input power is 5V+ and those pins are always exposed for accidental wiring</p><p>2) The bump would have to be exactly in the right spot and direction to have a chance at toggling the switch</p><p>3) You could tell people to put a bit of clear tape over it to rule out bumping entirely</p><p>4)It wouldn't affect the QWIIC connector (which must always be 3.3V)</p><p>5) People who install a shield that could potentially be destroyed would automatically block the slide-switch from view</p><p>6) This form factor is most useful for rapid prototyping of ideas, not building a mission-critical product. The speed afforded by a slide switch is therefore justified.</p><p>7) Most non-I2C parts are 5V or 5V tolerant anyways, at-least in my experience</p></p>
Nate on SPX-15296 - SparkFun BlackBoard CNateurn:uuid:e525157e-1117-d63a-9566-e1cf387a16062019-09-17T11:46:30-06:00<p>I have thought about this for years and it worried me: I would always be afraid of bumping the slide switch and making the system go to the wrong voltage, potentially frying a bunch of stuff. Is there a good solution in the middle (easier than solder jumpers but more fault tolerant than a slide switch)?</p>
Red Squirrel on SPX-15296 - SparkFun BlackBoard CRed Squirrelurn:uuid:cbdebc56-c9c9-92d2-0080-8d0c412a6e3e2019-09-10T18:51:58-06:00<p>[Note: I was instructed to move my comment from the redboard qwiic to this product]
If it wouldn't be too much trouble, could you replace the voltage selection solder jumper with either a small switch or a header that accepts a jumper in one of two positions (in the next revision)? Solder jumpers make it too easy to create unintended circuits once they have been switched more than once due to residual solder.</p>
Customer #187451 on SPX-15296 - SparkFun BlackBoard CCustomer #187451urn:uuid:5566b632-384e-b017-e8b7-a0ce914c4a4f2019-07-20T17:49:04-06:00<p>I got the previous version of the Blackboard and the newest (rev C). It is a really good dev board. The USB-C is a plus. The Qwiic support if very well thought off; the Qwiic connector contains the level translator for the +3.3V Qwiic system, but the SDA/SCL lines still maintain +5V support. For the Uno line, this is my new go-to.</p>