Hmmm

Member Since: March 30, 2009

Country: United States

  • Note that the colors are backwards from what the firmware tells you. You need to remove the plastic shroud around the connector and re-install it backwards for the colors to match. SparkFun should have this in bold ALL CAPS so people don’t connect this incorrectly and break things.

  • BEWARE: The version that says “2/10/2010” on the bottom has the wire colors backwards from what the firmware tells you they are.

    You can pull the plastic shroud off and re-install it backwards to correct the error.

  • This happened to me and a projectile capacitor piece broke my skin.

  • As a result, electrolytic capacitors cannot be used to couple AC signals.

    This is wrong. Electrolytic capacitors are used to couple AC signals all the time. In a coupling application, the capacitor has 0 V across it, so there is no way it can become reverse-biased. Both sides of the capacitor are moving up and down in voltage at the same time, so the voltage across the capacitor is close to 0 V, even while the voltage of the capacitor relative to ground swings all over the place. https://en.wikipedia.org/wiki/Capacitive_coupling http://sound.westhost.com/articles/capacitors.htm

    Also, electrolytic capacitors can withstand small negative voltages without harm. You have to get above about 1 V reverse bias and leave it there for a while before the cap gets damaged. https://en.wikipedia.org/wiki/Electrolytic_capacitor#Reverse_voltage

    Of course if there’s a DC bias in your circuit you need to make sure the electrolytic cap is in the right orientation, but they work fine with 0 V bias too, as long as the frequencies are in the range where there is minimal voltage across the cap.

  • it’s identical to a wire, but with the same body as a resistor so it can be grabbed by a machine. there’s no reason to include them in this kit meant for hobbyists. just use a wire.

  • yes, though ceramic or film caps that would be used in exact values in filters, not electrolytics

  • They can grab a single SOIC pin, but the plastic head is so big you can only probe one at a time, not 2 adjacent ones.

  • “25 each”? Should be a lot more 10 kΩ and 100 kΩ than other values, since you use those a lot more.

  • Can this easily interface with I²S audio CODECs and use its single-cycle MAC to do basic DSP processing? If not, what board should I use for that?

  • Are the waveforms band-limited/anti-aliased?

No public wish lists :(