Member Since: December 15, 2007

Country: United States

  • Any important differences we should know about, compared to ? I didn't spot any looking at the two versions of the schematic. Literally the only substantive difference I spotted was a change in the value of R2 (current limiter for power LED LED2) from 1k to 4.7k.

  • The linked product page says "Use both vertically and horizontally!" How well this will work depends greatly on the weight of your camera (or whatever) and the torque of the motor you use: you need a motor powerful enough to raise the load against gravity. A small stepper and a heavy DSLR are going to be a bad combination!

    I don't think the first concern is gear slippage, as the belt can be seen in the assembly instructions to be a toothed belt.

  • "Features" section says 3.3V ± 0.5V but datasheet says "2.7~5V". Which is right?

  • I needed to convert from a 1.8V device to a 3.3V device. When the 1.8V was connected connected via unpaired 6" jumper wires, the result was unworkable. Shorter wires (under 1") might have helped, but I went whole hog and ended up doing a custom board with the TXB so that there was only a half inch of PCB trace (with nice ground plane) instead of wires. That seems to work like a champ.

  • There seems to be no shortage of threads about "Access denied" with genuine Arduino boards for that matter:" perhaps one of them holds the answer to your problem. For what its worth, I suspect any Access Denied error is due to a Windows software issue, and unlikely to stem from any difference between the genuine Arduino Uno and this board.

  • Oh yes! Or just an arrangement of a SMT loading resistor + 2 pads for you to solder this on yourself. ADC6/7 just cry out for any use at all. Other ideas include pads for a SMT thermistor (again, would require a loading resistor) or the TMP36 temperature sensor. I'm not saying to increase cost by $1 by populating them, but give us some pads that might turn out to be useful.

  • The BOM calls Y1 a 16MHz resonator, so I'm guessing it's the less expensive and less accurate part. A typical* resonator has .5% tolerance, or 7.2 minutes/day, so it's a poor solution for timekeeping needs.

    *typical = first 16MHz SMT resonator I read a datasheet for

  • Yes, this board has the same functionality as the Arduino Uno: USBVCC is gated to +5V when VIN (barrel jack voltage) is below a threshold. Have a look at the "Comparator / 3.3V Regulator" section of the schematic as compared to the Arduino Uno reference schematic.

  • Any tips on how to get eagle 5.6.0 free version to route this board? It seems to not want to route to those SMD headers, whether in autoroute or follow-me mode. I wanted to try modifying the board design with some of the ideas mentioned in this thread, but (re)routing everything is quite a chore.

  • 5V according to the schematic. Color me confused that they don't explicitly mention this in the bullet points.

No public wish lists :(