bhunting

Member Since: August 13, 2010

Country: United States

  • Product DEV-10915 | about 4 months ago

    It took me a minute or two to figure out the buzzer so I posted a quick write up at TechSpin/Arduino Pro Buzzer.

    It seems the buzzer can be mounted either end up. I happened to mount mine with the words up and positive terminal down. Positive terminal connected to D4 and negative terminal connected to D5. With this configuration playing a tone on the buzzer is as simple as:

    void setup() 
    {
      pinMode(5,OUTPUT);
      tone(4, 1000, 1000);
    }
    
    void loop()  {  }
    

    Modifying the Arduino toneMelody example is as simple as adding a line and modifying two lines:

     #include "pitches.h"
    
    // notes in the melody:
    int melody[] = { NOTE_C4, NOTE_G3,NOTE_G3, NOTE_A3, NOTE_G3,0, NOTE_B3, NOTE_C4};
    
    // note durations: 4 = quarter note, 8 = eighth note, etc.:
    int noteDurations[] = { 4, 8, 8, 4,4,4,4,4 };
    
    void setup() {
    
    pinMode(5,OUTPUT); // <-- add this line
    
    // iterate over the notes of the melody:
    for (int thisNote = 0; thisNote < 8; thisNote++) {
    
    // to calculate the note duration, take one second 
    // divided by the note type.
    //e.g. quarter note = 1000 / 4, eighth note = 1000/8, etc.
    int noteDuration = 1000/noteDurations[thisNote];
    
    tone(4, melody[thisNote],noteDuration); // <-- edit this line
    
    // to distinguish the notes, set a minimum time between them.
    // the note's duration + 30% seems to work well:
    int pauseBetweenNotes = noteDuration * 1.30;
    delay(pauseBetweenNotes);
    // stop the tone playing:
    
      noTone(4); // <-- edit this line
    
    }
    }
    
    void loop() {  // no need to repeat the melody.
    }
    
  • Product ROB-11954 | about 8 months ago

    I have the previous rev of this board, the ROB-11622, bought it with the redbot kit the day it announced on the Friday new product post. Awesome little kit, very happy with it. So, what are the differences between the old board and the new? The schematics appear to be the same, same filename and rev on the pdf. The board images are the same, no differences there. Is it just a silkscreen change or is there a schematic / board layout change?

  • News - The First-Ever Complete T… | about 11 months ago

    Thanks Nate for sponsoring this tear down. It was interesting to see what goes into a cutting edge product developed by one of the most tech capable companies around. Apparently this is what near infinite financial, intellectual, and technical resources will get you. I haven’t been following google glass so I was kinda surprised to hear this was the first in depth-‘ish tear down. I assume google is smart enough to know that sooner or later someone would do a detailed tear down. I wonder why google didn’t just publish their own detailed tear down. Maybe they were concerned about their privacy.

  • Product WRL-10663 | about a year ago

    What drives the requirement for powering this eval board at 3.3v? The datasheets for both the Si4703 and TPA6111A2 indicate support for 5v power. The Si4703 datasheet says “2.7 to 5.5 V supply voltage - Integrated LDO regulator allows direct connection to battery” and the TPA6111A2 says “Fully Specified for 3.3-V and 5-V Operation”. So why the multiple warnings to only use 3.3 volts to power this board?

  • News - SparkFun Gets a Subpoena | about 2 years ago

    Sounds like I’m singing with the chorus but here’s another thank you for your attempts to limit the release of private information.

  • News - On The Trail of the Black… | about 2 years ago

    Great post. We all know there are tons of geeky technology out there, but seeing a really interesting application of some of that geekness is cool.

  • Product KIT-09236 | about 3 years ago

    Actually it’s 10 pins, PD0 - PD7 plus PC0 - PC1. Put the bit pattern on PD, then allow current to flow through the 7-seg of choice by outputting a low on PC0-1. Output the pattern on PD and ground one of PC0/1 to light up that 7-seg. If you switch back and forth between the two 7-seg fast enough your eye perceives a continuous pattern displayed on each.

  • Product CAB-09741 | about 4 years ago

    dave2, “description suggests only huge packages” is reasonably accurate. I’m sitting here with a package of these in my hand. I’d say they will be good for 0.1 headers, solderless breadboard work, passive lead clipping, standard dips, meaty connection points like that. I don’t expect these would do well with fine pitch ICs. These are NOT micro-grabbers. At $5 for 5 don’t expect them to be.

  • Product TOL-09316 | about 4 years ago

    I just got back from the Sparkfun SMD soldering class. I used one of these for 30+ minutes off and on to INSPECT my joints.
    I wear glasses but found for inspection it worked well. The focal length was probably about an inch or so away from the lens. But even with my bad eyes I was able to get a clear crisp view. The led light was particularly nice, it actually worked well to illuminate the viewing area.
    I took the head band off, it easily pops off and on. I removed my glasses, held the loupe to my eye, and positioned the board as desired. Crisp images with excellent detail.
    The down side is it is completely plastic doesn’t have a very sturdy feel. It wouldn’t surprise me to see the LED busted off or the loupe cracked. For 10 bucks it’s probably not a bad deal (although you can find them cheaper with a little leg work) but I wouldn’t expect it to last a lifetime.

  • Product TOL-00084 | about 4 years ago

    Just got one of these for home, put it together this morning to fix up some headphones.
    So far I like this iron. It heats up quickly and I did not note any issues with cooling or lack of heat. It is well packaged and assembled cleanly. I’m used to Metcal irons but so far I don’t have any issues with this iron.
    Being a chinese knockoff I am concerned about long term reliability. If it is still working as well 5 years down the road I’m going to consider it a win. I picked up my order in Boulder and got a quick tour of Sparkfun’s facility. I saw multiple of these Aoyue irons and hot air rework stations, all seemed to be actively used.
    I like the tip holder and solder reel. Solder feeds over the back and out the bottom front. It feeds cleanly and is easily reeled back in when done. A nice feature and something I wish my Metcal had.

No public wish lists :(