Spencer2

Member Since: July 12, 2009

Country: United States

Profile

Spoken Languages

English, Spanish

Programming Languages

Java

Universities

BYU Idaho

  • Product TOL-12029 | about 8 months ago

    Will you carry the Y adapter? I’ve been wanting to make one of these for 5 years. I’m going to experiment with using an arm as a fume extractor.

  • Product DEV-09473 | about 2 years ago

    This product looks great.

    1. Can you post the eagle files or at least the pinout? I am going to add a header on all my pcb’s from now on.
    2. Any Idea how soon they will be back in stock?
  • Product DEV-10864 | about 2 years ago

    Here are to some links to how real POE 802.11.af and 802.11.at for those who are interested. Aka ‘clause 33 devices’

    http://www.infocellar.com/networks/new-tech/PoE/PoE.htm

    http://www.electronic-products-design.com/geek-area/electronics/ethernet/power-over-ethernet-poe

    True 48 volt POE won’t damage anything non poe capable plugged into it because the PSE (Power Source). does detection. It performs an initial voltage ramp from 2 to 10.1 volts and looks for a signature resistance of 25K ohms. If that resistance isn’t detected it immediately shuts off power and goes into normal ethernet mode without power.

    If it does detect 25K ohms, newer 802.11at devices (mainly switches) then slowly ramp from ~15 to ~35 volts looking for another signature resistance. Here the PD (powered device) has the opportunity to ‘tell’ the PSE what wattage it requires. There are 4 classes of wattage. from 4 watts to 15.4 watts. If the PSE doesn’t detect this second signature, it assumes it is a class 0 device and makes all 15.4 watts available to the end device.

    That said there are unintelligent POE injectors (aka midspan devices) that simply spit out the standard 48 volts without any regard as to what device is at the other end. These are non standards compliant and have a tendency to burn up 12 poe devices if you aren’t paying attention.

    Other facts: Data is sent over pins 1236 on a A style device. To be 802.11.af compliant, the PD must also be able to receive data over 4578 and voltage over 1236. Common scenario is with a crossover cable. Little known fact is that it is possible to send power and data over the same wires. Gigiabit poe is possible even though gigabit requires all 8 wires.

    Even non gigabit but compliant devices have to be able to receive voltage on any pins and data on any pins, even at the same time.

    http://www.bb-elec.com/tech_articles/Power_Over_Ethernet.asp http://en.wikipedia.org/wiki/Power_over_Ethernet

    Hope this info is useful to someone. Any corrections, let me know.

  • Product TOL-10865 | about 3 years ago

    I was having the same problem! I grid putting the metal extension all the way down the handle, however it wouldn’t fit in the case when I did.
    I found a set of wood chopsticks from one of those teriyaki places. It fits perfectly, just cut off the end that pokes out too far.

  • Product TOL-10865 | about 3 years ago

    I bought this from china and it took several months to arrive. Had I just waited, I could have gotten it from spark fun for the same price.
    Con: Maybe its just me, but since the handle is hollow, the bits like to collapse inside whenever I put any force on it at all.
    I modified mine by filling the hollow handle with a wooden chopstick. Now it works great. Absolute best kit for $10 anywhere!

  • Product COM-00733 | about 3 years ago

    Is there a though hole Eagle file for this anywhere? I have completely exhausted google.

  • News - Free Day Recap | about 4 years ago

    I would like to know the data on the most popular browser/isp connection. I tried frantically every browser I had. Safari,Firefox,Opera,Camino all averaged about 1 time connecting to the site, but never could get all the way through checkout. Chrome got close, it made it past 3 page loads. In the end, none ever were able to get us some parts.

  • News - Free Day is Done | about 4 years ago

    Think about it, 100K means that just 1,000 customers will get $100. Sounds like a lot, but really isn’t. Currently there are 1,000 guesses. Facebook has close to 1000 followers. So that means not even all of the most involved customers will be able to get free stuff. Forget about the friends of customers and family members also fighting. I am supper excited, but looking at the numbers suggests that it will only last a few minutes. Thank you spark fun, I’ll be counting down the seconds.

  • Product COM-00602 | about 4 years ago

    I am looking for someone sharp enough to figure out how to lower the input voltage on these leds. They appear to be fully dimmable. But for the life of me I can’t figure out what I would need to do it.
    A hand full of these make a great work bench light source. I want to use a microprocessor (aTiny or similar) to create a touch sensitive light switch that is able to turn several of these on to a desired brightness. Normally I’d use PWM to get the correct brightness, but these are way to powerful to run straight from a microprocessor. I am thinking somehow using one of these?
    http://www.sparkfun.com/commerce/product_info.php?products_id=527

Name Pieces Total
Alien Clock
6 31.9