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46  Using Arduino / Project Guidance / Re: making a "clapper" on: March 26, 2014, 08:36:21 am
Old school way...



Or feed the amplified signal into a0 of arduino, and then switch it on (lot easier too) but I like the 4017 smiley
47  Using Arduino / General Electronics / More current parraraling up... on: March 25, 2014, 02:16:52 am
Using 2 or 3 7805's or 2 or 3 transistors, due to voltage missmatch and one burning out due to excessive current from a higher voltage...

So how do inverters get around this problem?
48  Using Arduino / General Electronics / Re: squeezing every bit of juice from AA batteries on: March 22, 2014, 02:47:40 am
Look up Joule Thief some time.

There's a MAKE Article and Youtube about making a bracelet that uses sunlight on photodiodes to charge 3 caps that a Joule Thief made mostly from a small choke (you don't even have to wind coils) to light a led you can see in daylight.
The full article: http://makezine.com/projects/Solar-Joule-Bracelet/
The YT: https://www.youtube.com/watch?v=ghB2irHIN8I



A joule thief will only be if use if you're powering less sensitive electronics with it, or the ripple will mess up the operation of most ic's.
49  Using Arduino / Project Guidance / Re: Power supply help? on: March 21, 2014, 09:51:40 pm
Just buy a 7805  and an lm317 or a 3.3v ldo (surface mount)

50  Using Arduino / Project Guidance / Re: lighting a tunnel on: March 21, 2014, 09:41:53 pm
Yes, you'll need to use high powered leds, 10watts at least each, and mosfets/power transistors to drive them...

As for detection,  maybe an infrared motion sensor .
51  Community / Bar Sport / intellectual jokes! on: March 21, 2014, 09:32:46 pm
I don't get the pascal joke (4)

Even if you get them all, they're not that funny lol
52  Using Arduino / Motors, Mechanics, and Power / Re: Logic-Level Power FETs you'd like to see/use?? on: March 21, 2014, 11:20:44 am
http://www.nxp.com/documents/data_sheet/PHB_PHD_PHP21N06LT.pdf

That's a true logic level mosfet.
53  Using Arduino / Motors, Mechanics, and Power / Re: Logic-Level Power FETs you'd like to see/use?? on: March 21, 2014, 11:06:36 am
Neither are logic level mosfets.

So I guess for beginners/kits neither are ideal unless you're happy not being able to saturate the transistor.
54  Using Arduino / General Electronics / Re: shift register resiliance? on: March 21, 2014, 05:16:05 am
Shiftregisters use flipflops,  transistors, there's nothing to wear out ..

The capacitor is the first to fail, refresh writes in memory, the voltage gets unstable and leads to a bad read, but transistors hardly fail unless exposed to too much current or voltage.

55  Using Arduino / General Electronics / Re: SIP IC's on: March 21, 2014, 03:23:10 am
Wow, that is surprising...... I figured all sip style ic's were just resistor bridges.
56  Using Arduino / General Electronics / SIP IC's on: March 20, 2014, 10:37:58 pm
I had a dream where IC chips came in SIP form, eg a shift register or a Microcontroller,  maybe they have their uses requiring only 1 row of pins, they would be great for light shows not needing jumpers around/over/below traditional DIP's...

Maybe I'm the only one lol
57  Topics / Science and Measurement / Re: Voltage Output from Arduino with Multiplexer. on: March 20, 2014, 01:33:34 am
With a voltage divider?
58  Using Arduino / General Electronics / Re: I hate surface mount soldering, (shopping question) on: March 19, 2014, 07:32:22 am
Solder paste and a heatgun might be an option if you're fed up of using a soldering iron.

slap on paste, aim the heatgun 10 - 15 seconds later, done.
59  Using Arduino / LEDs and Multiplexing / Re: Flickering Neopixel strip during Rainbow+Fade issue on: March 18, 2014, 11:01:36 pm
I don't see flickering more choppyness, ie not smooth.

It's not flickering on/off per say?
60  Using Arduino / Project Guidance / Re: Do you think that this would be easy to do? Extreme criticism welcome! on: March 18, 2014, 06:44:06 pm
Easy.. not really
Time consuming,  hell yeah

I think you need to learn to walk before running.

Transistors on the inputs a typo?  I'd use voltage dividers on the inputs personally or zeners.
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