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  1. Braeden Hamson

    Huskyvarna radio ear defenders

    I'm glad it works well, the neotek shouldn't have any effect over the internal radio. Because its not dealing with the external port. Your new amp amplifies your phone's audio signal going into your headset. And that's it. If you wanted to increase the volume of your built in radio, you'd...
  2. Braeden Hamson

    Huskyvarna radio ear defenders

    I really don't see why an external amp, like the one you showed, wouldn't work. IMO buy it, if it doesn't work return it. (Although from my understanding modifying the external amp, if it were too quiet, wouldn't be extremely difficult.)
  3. Braeden Hamson

    Huskyvarna radio ear defenders

    That's interesting, you can't connect the common ground to the amp ground? Why not?
  4. Braeden Hamson

    Huskyvarna radio ear defenders

    Yeah that's what you're after, and a good price too! I doubt you could get a cheaper one if you DIY.
  5. Braeden Hamson

    Huskyvarna radio ear defenders

    Screw the $40 stuff, here's an $8 bit from eatafruit: https://www.adafruit.com/product/987 If you bought that you could get a very small enclosure for it and, a small lithium cell & charge/protector circuit, as well as a potentiometer to adjust the volume. You could also just use 2 or 3 1.5 AA...
  6. Braeden Hamson

    Huskyvarna radio ear defenders

    I'm sure there's an off the shelf solution out there. I looked up inline headphone amps and found a list. They're a little pricey though. http://lifehacker.com/five-best-portable-headphone-amplifiers-1722800379 Though if you want a DIY solution you could potentially make one using an opamp...
  7. Braeden Hamson

    Are common grounds safe?

    In my projects I tend to tie all of my grounds together and call it a day. I'm pretty sure this is safe most of the time, but I'm wondering if there is a case where it's not okay to put all the grounds together. Off the top of my head I'd say don't tie a DC ground to an AC ground. And I get a...
  8. Braeden Hamson

    Frankenstein's Components.

    You can get lithium cells out of laptop batteries (no surprize) if you go to Goodwill they sometimes have stacks of them.
  9. Braeden Hamson

    2.4 ghz point detection

    So is it impossible to measure the intensity of EM waves at 2.4 GHz at a point in front of a detector? Will any antenna operating at this frequency at minimum pick up a signal 15-20 deg in front of it? Is this because them EM waves are behaveing like visible light passing through a slit, as per...
  10. Braeden Hamson

    Joystick keyboard

    Also, why a potentiometer joystick? Perhaps a hat switch, would work better. They're like a thumbstick except its 4 buttons. I could see them working a little better for your fingers, perhaps you could 3d print some cups to put your fingers in so you can easily move them without slipping off a...
  11. Braeden Hamson

    Joystick keyboard

    Look into Joy to Key. Its a really sweet program that lets your joysticks emulate keypresses. If you want to build a controller I'd recommend using MMJoy2. http://joytokey.net/en/ http://simhq.com/forum/ubbthreads.php/topics/3899105/4 The guys on the Eagle Dynamics forums input output section...
  12. Braeden Hamson

    2.4 ghz point detection

    I've learned that I want an antenna with a very narrow aperture. I'm sure this has been the subject of many years of research and a few careers. You seem to have an understanding of EM waves that I haven't yet been taught. Its always bugged me that in school (Second year EE major here) they say...
  13. Braeden Hamson

    2.4 ghz point detection

    Why is 15-20 deg the minimum? Also, I don't know much about antennas, but I have a decent understanding of light and optics. wifi and other 2.4 ghz signals are just photons. Let's consider visible light for right now. If I have a long tube with a photoresistor at the base and an opening at the...
  14. Braeden Hamson

    2.4 ghz point detection

    I know little about antennas, this is my first foray into RF. I'm trying to find a good antenna that works with 2.4 ghz (wifi, bluetooth and such) I'd like it to have a very very narrow "field of view." Basically I want to be able to take point measurements of 2.5 ghz intensity. I don't know if...
  15. Braeden Hamson

    Why do they print brown letters on black chip packages?

    Did all these engineers just not have a grasp of graphic design? Should engineers mingle more with those art folk so they can understand that nobody can read brown on black? Maybe the engineers only see the world in shades of grey and brown. That'd explain why they only wear brown sweaters. But...
  16. Braeden Hamson

    Battery Powered Variable Power Supply

    What's the tolerance on the buck-boost regulator? I suppose this thing doesn't need to be a perfect piece of equipment, if I were to do serious work on something I'd use a lab power supply. To be honest this project is more for me to learn about these types of components. The use cases I can...
  17. Braeden Hamson

    Battery Powered Variable Power Supply

    Thanks for the heads up, I will steer clear of that circuit. Any recommendations? The laptop pack already has a battery maintainer circuit attached. It has 9 pins that connected it to the laptop, so that will be interesting to figure out. I was hoping to make use of that, otherwise I'd build...
  18. Braeden Hamson

    Battery Powered Variable Power Supply

    Hello there, I've posted about this before but I'm looking for more info. So I'm wanting to make a portable variable power supply that has a regulated voltage and current. Like those nifty bench power supplies. This one would use a laptop battery, It's made of 6 UR18650A. I found this nice...
  19. Braeden Hamson

    Using a Voice-Activated Switch to Control My TV Remote Mute Button

    This sounds like a good project for an arduino. So, you can connect a microphone to the arduino. A circuit like this one will run the microphone pretty well. http://www.circuitdiagramworld.com/uploads/allimg/201411/Op-Amp-Microphone-Pre-Amp.gif Or a plug and play solution. Adafruit Mic I'm...
  20. Braeden Hamson

    Doubling capacitors in flash?

    My two cents is that flash is fairly cheap. So go for it if it explodes, saftey squints. There are a lot of variables here. We'd have to know the trace size and part numbers of all components between the capacitors and flash. Just remember capacitors are like vindictive girlfriends they'll shock...
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