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  1. J

    Choosing of Micro Controller

    and I have never found a third party front end to avrdude that had all the right settings. especially any made for the duem. It is what it is, avrdude is the tool and as a student you should learn to use it.
  2. J

    What is this component?

    Because he said it was completely blown off by the lighting that hit his house, the pic is one that he managed to find on the internet for comparison. Which would make sense, if lighting did take it out, to be a avalanche device.
  3. J

    Personal Attack Alarm Circuit Diagram

    This seems trivial or could I be missing something obvious? Connect a battery to a buzzer and make the pin the switch.
  4. J

    What is this component?

    I don't really have a guess but the GA is probably the key. What are the other resistors labeled as?
  5. J

    how to write c code for motor

    Well my best advice is to search google for code in the language you want to learn. Reading and playing around with code that already works is a great way to learn the language. what type of micro-controllers have you looked at? If you are interested in the PIC's. Sorry, it is in english...
  6. J

    how to write c code for motor

    vead, on a serious note, do you understand what harald is trying to say? You really left us with no way to help you. Did you get it figured out or are you still stuck? If you still need help we will need you to answer haralds questions.
  7. J

    Making an alarm to remind drivers to unplug anderson plug

    Yep, I will agree with coke man. Make the personnel responsible for the damages. It will put a halt to the idiocy real quick. It has worked in the past and it will work far into the future. People never seem to care until it is their money being ripped out of their wallet. Grown men ffs, are...
  8. J

    Choosing of Micro Controller

    first sentence on the page... The duem and uno both require different speeds when uploading hex files. This app will have the same issue as the rest I tried(because it is a front-end for avrdude). I have yet to find one app that works 100% on all versions. I just use the cmd line, so much better...
  9. J

    how to write c code for motor

    main() { motor_on(); } That didn't work, thought you where smarter then that? :D
  10. J

    MAKE: Electronics Ex. 10 Help Needed

    1.5V? Yeah that will never work. You will need to come up with 12V supply or as KJ hinted at, change the value of the components to work with a 9V battery supply.
  11. J

    blank TV, viewable menus, powers off only with unplug. HELP!

    She posted a operators manual. It is in her first post I think. It does sound like two different issues might be going on. I just can't help but think that heat is causing it to blank out. Seems very plausible form her description of the problem. I still suggest a good google search. I once...
  12. J

    Choosing of Micro Controller

    http://forums.parallax.com/showthread.php?121131-Javelin-End-of-Life-Announcement& well as per one of your shortlisted items, this is probably as good as any reason. :) This looks like some pertinent info on the stamp. Since you already decided on the uno, I assume you know it's capabilities...
  13. J

    New project: Voltage Controlled Filter

    I got a guess why, the cost. $14 dollars for a PDF file??? I have paid that kind of money for a PCB with instructions and a BOM before. edit: I guess the cost is for the board. The way the site was setup it really looked like they wanted to sell you a PDF. I'd by the board and make it, looks...
  14. J

    Basic Transistor Question

    you could probably make a simple boost converter. What is your current requirement?
  15. J

    Basic Transistor Question

    I don't think you understand how a transistor works. They are current amplifying devices. Is this an AC or DC voltage you need?
  16. J

    Replace Switch on circuit board question

    http://www.amazon.com/Mushroom-Emergency-Momentary-Contact-Button/dp/B006Z5A6O4 Like this, but the ones at my local electrical supplier have an even bigger mushroom head.
  17. J

    incremental resistance of a diode

    Oh this is that MIT course?
  18. J

    blank TV, viewable menus, powers off only with unplug. HELP!

    no and no Just a chump that hangs around trying to learn and give back as much as I can. You look for signs of trouble. Bulging caps, burn't marks, lose connections, things that seem unusual. Of course you might not find anything at all. The tv will have to be plugged in and working if you try...
  19. J

    Do I need a step down adapter?

    If you add in a diode to make a half-wave rectifier on the incoming 220VAC. The output, pulsating DC component, will be ~100V/10 Ohms = 10A. So you need a diode at least rated for 10A. What diode are you trying to use? The Vp of one half of a 220VAC signal is 312V, so the reverse breakdown...
  20. J

    Do I need a step down adapter?

    If we work backwards, 1200W/220V = 5.5A 220V/5.5A = 40 Ohms 40 Ohms/2 = 20 Ohms per resistor If you parallel 20 Ohm resistors then you have a total resistance of 10Ohms @ 110V which is about 1200W. That would be the same as before, so I don't see why you would want to do that, it wouldn't...
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