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MrSinewave

Member Since: January 6, 2007

Country: Canada

Profile

Bio

Custom electronics designer and fabricator

Expertise

Electronics and Prototyping

Websites

http://aeinnovations.com

  • Product ROB-12154 | about 3 months ago

    “Motor Size: 1.30” Diameter x 1.03” Length” can be misleading. It suggests the unit is a little over an inch long. It is in fact over 2" long (the motor portion is about an inch, and the permanently-attached gearbox is another inch). I should have checked the dimensional drawing. :P

  • Product COM-11222 | about 2 years ago

    I wish I could help but I don’t remember any real further details! But your reply does bring up the possibility that I’m remembering clearly something that never happened. I was certain it was in related items because that’s how I remember purchasing it, but maybe I just plain goofed! :/

  • Product WRL-09976 | about 2 years ago

    Defaulting to D2 and D3 on the Arduino is no longer very useful - the MEGA and Leonardo Arduinos cannot support software serial RX on just any pin.

    If you don’t want to use the main serial UART this shield allows easily switching the XBee’s DIN and DOUT to pins Digital 2 and Digital 3 on the Arduino. But this means using the SoftwareSerial library and the library has the following known limitations regarding what pins can be used:

    From the ‘SoftwareSerial’ library link in Arduino 1.01 (http://arduino.cc/en/Reference/SoftwareSerial)

    • Not all pins on the Mega and Mega 2560 support change interrupts, so only the following can be used for RX: 10, 11, 12, 13, 50, 51, 52, 53, 62, 63, 64, 65, 66, 67, 68, 69
    • Not all pins on the Leonardo support change interrupts, so only the following can be used for RX: 8, 9, 10, 11, 14 (MISO), 15 (SCK), 16 (MOSI).

    I think that D2 and D3 as the choice for alternate DIN and DOUT is outdated.

  • Product COM-11222 | about 2 years ago

    Do not order PRT-10357 (JST SH Jumper 2 Wire Assembly - 8") as a connector for the JST plugs on this unit - it does not fit (too small). It was in the “related products” when I ordered but it is different and will not fit.

  • News - Free Day 2012 is Under Wa… | about 2 years ago

    It’s not sparkfun’s problem if you feel you’re entitled to get free stuff your way.

    You’re right, of course, but that’s not necessarily what’s happening with most people.

    People feel entitled not to free stuff - but to a fair shot at the coupon. The only reason someone will be upset is because they don’t feel like they got what they were entitled to.

    They feel entitled because entitlement is a normal result of getting invested in something. When someone has marked off their calendar, set up reminders, perhaps reg’d an account, Free Day hasn’t started yet and they will already be invested and as a result (quite normally and naturally) feel some amount of entitlement.

    Now MOST of us will feel entitled to nothing more than getting a fair shot at a coupon. But if those people are also feeling upset, then it’s because the captcha process felt less like a fair shot at a coupon, and more like you marked your calendar and lined up just to wind up running on a treadmill for an hour or two (or more!) while nothing seemed to really happen until you were plain worn out.

    In other words, you felt entitled to a fair shot at a coupon but don’t feel like that’s what you got. You can as result reasonably feel cheesed at the Free Day process while not actually being some whiny spoiled child.

  • News - Free Day 2012 is Under Wa… | about 2 years ago

    Thanks for Free Day, but I give up!

    I had been typing in captchas as fast as I could for far too long, I realized. Maybe I can’t stand useless labour, but no 100$ is worth this; I gave up.

    More for everyone else!

  • Product BOB-09964 | about 3 years ago

    Here is some practical info on this unit. I have no particular expertise in sound engineering but did have to make a VU-meter (volume-level LED bar-graph) project a while ago and learned a lot. If you’re anything like me, this should help you decide whether this board is for you.
    If you hook this unit up to your analog input, you’ll get readings all right, and they will go up and down in response to sound, and they will look OK and usable at first glance. BUT if you try to use those numbers directly to drive a VU-Meter or something, you’ll drive yourself batty on a wild goose chase seeking the right values and thresholds and stuff! The unit is not malfunctioning.
    This board is actually outputting an analog waveform that is representative of the incoming sound. This is NOT the same as “volume” or “loudness”! (To novices - like me - this is not intuitive, especially from the description.)
    From my limited understanding, to get “volume” (Sound Pressure Level) from this unit would require:
    Readings from sensor + High Sampling Rate + Calculus = Sound Pressure Level
    Don’t ask me how to do that because I have no idea. (Probably things like this is why sound processing is a whole separate branch of engineering.)
    In short, if you want to give your project ears so that you can just tell it:
    soundLevel = analogRead(audioPin);
    if (soundLevel > 1000) { Serial.println(“SUPER LOUD!!”); }
    if (soundLevel > 512 ) { Serial.println(“Pretty Loud”); }
    if (soundLevel > 127 ) { Serial.println(“Normal”); }
    if (soundLevel < 100 ) { Serial.println(“Ignoring..”); }
    This unit will NOT do that.
    Instead you probably want the ZX-Sound (others' suggestions) or the Phidgets Sound Sensor (which I used, just putting the output directly to my ADC and using the raw values, which by the way probably uses only a fraction of what that board’s capable of, but it worked great.)

  • Product WRL-10421 | about 3 years ago

    Model number in description is incorrect: XBP24-BZ7WIT-004 is correct. Model number given is for PCB antenna version.

  • Product KIT-10140 | about 3 years ago

    Careful! This device has two identical JST connectors, but the pinouts (+5V, GND, Freq In) are different on each! Double-check before you plug anything in.

  • Product BOB-09116 | about 3 years ago

    Slight mis-labeling on the breakout board: There is no “OUT2” signal on the DS1077. OUT2 on the board is OUT0 on the DS1077. (OUT1 is correct however)

No public wish lists :(