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76  Using Arduino / General Electronics / Re: Current flow + to - on: February 07, 2014, 03:04:00 pm
And, as was hammered into my contemporaries and myself by an instructor named 'Bill Sparks' (that was inspiring by itself),  "Current does not flow, current is flow"...... (do wha? dang it, whats that mean?  Is he talking about the arrow head thingie, or the bar thingie?  Maybe I shoulda said I wanted to be a mortor man....)
77  Using Arduino / General Electronics / Re: What is this? on: February 03, 2014, 11:25:24 am
Somebody get a rope.

Maybe we should tar n feather him.

Naw, his mom might get mad if we mad a mess, let's just draw n quarter him.........

Bettergammer, Don't get upset, they treat everybody that way, (well, everybody who doesn't bothe to do some research first).  Take Mark's advice anf google "4N35" and "L293D".  You probabllycan't use them until you get a little (well, maybe a lot of) experience under your belt.

But, you gotta admit that the ladder crack was funny (and with  little advice hidden between the lines).

Don't give up.  Ignore the asses and try to gleen a little intelligence. 
78  Using Arduino / General Electronics / Re: How to saturate at maximim BD135? on: January 30, 2014, 12:25:38 pm
Look in the datasheet for your transistor for "DC Current Gain" or "HFE"  ("hfe" is AC gain, don't use this one for your type of circuit).
79  Using Arduino / LEDs and Multiplexing / Re: (solved) Can a green laser pointer be modulated to 38 kHz? on: January 29, 2014, 03:46:27 pm
You can get 1um LASER diodes for fairly reasonable prices. you'll need a collimating lense and a 2.2V 80-100mA driver.  It'll fire a p4038 just fine if moduleate at 36-38 KHz.  You use a paper or plastic tube about 25mm long and maybe 10mm in diameter to reduce the possibility of near hits firing the sensor.
You do NOT want a visible (green, or to some extent red) coaxial LASER in your sender for training.  That just trains the subject to follow the beam into the bulls eye.  You indicate hits by a monostable driven LED at the target.  Unless you want to show near hits and misses for targeting correction, then you are talking about a martix of sensors and lots more money (and something bigger than an UNO to detect and register the hits).
It's a fun project,  but for practicality, there are cheaper units available on the market that use RED lasers at closer range.
But, if you decide to go ahead with it,  GO FOR IT, LEARN, and Have Fun!
80  Using Arduino / General Electronics / Re: nrf2410l on: January 27, 2014, 03:26:38 pm
What is your problem with 1) using libraries, and 2) listening to the help people have given you?
All the hard interfacing work was done for you by the folks who developed the libraries.
You like to cite program examples for the ultrasonic sensor as examples of 'NO LIBRARIES'.  Go back and look at those programs.  See the Serial.**** statements?  What do you think is going on there?
You say you have done your research, but you have not tried to understand ANY of what you have seen or been told.

Nobody here can help you until you are willing to work at understanding what is beeing presented to you.

Like it says in the doc: 
MISO: Master In Slave Out  (microcontroller is the Master, peripheral is the Slave
MOSI: Master out Slave In
 and so on, and so on, and...
81  Using Arduino / General Electronics / Re: A capacitor is charged and discharged every 0.01 s on: January 17, 2014, 03:50:48 pm
Anybody ever see a 33KV power transformer on a power pole give up the ghost? KaBOOOOM!! and a great blue and yellow flash. Marvelous, but I am now saddened to find out that those weren't actually explosions, just catastrophic venting......  Oh, the good old days.
82  Using Arduino / General Electronics / Re: Circuit fails after 2nd power up on: January 15, 2014, 02:52:48 pm
Are you ever going to answer the question abot where you are getting power?
83  Using Arduino / General Electronics / Re: Power Board PCB on: January 06, 2014, 02:16:45 pm
Since nobody else has directly answered your question:  Yes, as described,your circuit board, when all wired up, will most definitely produce about $100.00 worth of smoke, but just once (at least until you replace the arduinos).  Should that NOT be your intention, I would suggest you do some more research and go back to the drawing board.
84  Using Arduino / Project Guidance / Re: Usb woes on: January 03, 2014, 11:51:09 am
My vote is RF noise from the lamp fixture.  Try a better shielded USB cbl, or try looping through a ferrite bead (dougnut, tube). 
85  Using Arduino / Project Guidance / Re: Questions of a newcomer [ESC, digital/analog IO] on: December 19, 2013, 01:50:59 pm
Lefty,

Thanks for the info.  Where DO you get your Philips and Torx claw hammers? smiley-lol
86  Using Arduino / Project Guidance / Re: Questions of a newcomer [ESC, digital/analog IO] on: December 19, 2013, 11:38:42 am
As one can notice, I also seem to have the same problem with letters.....  How do you edit a post after submitted?

Arduino may not be the 'best tool' for your problem.
87  Using Arduino / Project Guidance / Re: Questions of a newcomer [ESC, digital/analog IO] on: December 19, 2013, 11:35:48 am
I have, on occassion, been able to successfully use a screw driver as a hammer, but I have never been able to satisfactorialy utilize a hammer as a screw driver.  heen advised that it is something to do with 'selecting the correct tool for the job at hand'.
88  Using Arduino / Project Guidance / Re: using the PINxn Register on: December 18, 2013, 12:11:48 pm
Why not do your set/clear bit inline? See: http://www.nongnu.org/avr-libc/user-manual/inline_asm.html
89  Using Arduino / General Electronics / Re: Reading 0-100 mV signal on: December 17, 2013, 03:42:39 pm
Dan,
Bear in mind that NOTHING discussed here will meet air worthiness certification ( even if assembled by an air mech).
Now given that and what I have read so far, I still feel that you can get a 'mostly' functional system working using just about any single supply op-amp in the non-inverting configuration.  I suggest that you put it together, apply the input to a meter and see what your results are. If you, indeed, get readings between 0 and something less than 5V (repeatable), then apply the output to an analog input pin and start fiddling with some of the analog sketches (like the tutorial for pots, only replace the pot to supply with thw sensor/amp output) and see what you can do with it.
90  Using Arduino / General Electronics / Re: Reading 0-100 mV signal on: December 17, 2013, 02:43:34 pm
Oops, my bad again.. yes, typo.

I am trying to keep it simple for the OP, who said he was not experienced with op-amps.  A good instrumentation amp probably be a better solution for accuracy, but I still believe he can get it functional and learn some things in the process with a 358.  From his description of the issue, he really does not have to go full scale, just find his trip point.  With a 5V single ended supply, the op-amp will provide any needed input protection.

Brute force may not be very elegant, but it can be used to get the job done.
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