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46  Using Arduino / General Electronics / Re: Simple waveform gen for oscilloscope practice? on: September 12, 2014, 12:43:27 am
In just bought a dso.
What did you get?

I am looking at getting this one:
47  Using Arduino / General Electronics / Re: Simple waveform gen for oscilloscope practice? on: September 12, 2014, 12:38:05 am
I've used one of these in the past (but that's dating me):

Edit: about $8.00 USD

Of course, your Arduino can make nice programmable square wave/pulse/PWM wave forms.
48  Using Arduino / General Electronics / Re: Put all your I/O in one place on: September 12, 2014, 12:28:22 am
Made an  "All In One Front Panel" to accompany the "All In One I/O"
Complete with:
-  LEDs
-  Switches
-  Keypad
-  DB-09
-  POT
-  4X20 RGB LCD

Use the two units as you would a patch panel.
49  Using Arduino / Project Guidance / Re: Yes Or No, will this work or shall I go elsewhere? on: September 11, 2014, 07:28:13 pm
Yes Or No, will this work or shall I go elsewhere?
bump for more input
Being aggressive isn't going to be appreciated by most and won't make people rush to your aid.
Give it some time.

50  Using Arduino / Microcontrollers / Re: atmega328p problems bootloading on breadboard via rs232 on: September 11, 2014, 11:40:33 am
Add decoupling capacitors to the circuit.
See Nicks setup.
51  Using Arduino / General Electronics / Re: Internal Pullups Not Enough? on: September 11, 2014, 11:30:14 am
Could it be that the internal pullups are now not enough?
It's easy enough to use external ones.
Try them.
I would spend time on adding decoupling and rearranging the grounds to stop the electrical noise.
52  Using Arduino / Project Guidance / Re: How to increase piezeo speaker range? on: September 10, 2014, 12:43:15 am
That speaker should have a resonant frequency it works best at (probably around 4KHZ)
Your pickup device probably is rolling off at 19KHZ.

You either get a different piezo, drive it harder with a amp or lower the frequency to resonance.

53  Using Arduino / Programming Questions / Re: Mosquito Anti Loitering Device on: September 10, 2014, 12:35:38 am
As Jim said.
A member came up with this:
54  Using Arduino / General Electronics / Re: Hardware manuals/books on: September 09, 2014, 09:27:12 pm
The Teens book is great.
See also,
55  Using Arduino / Project Guidance / Re: Help with Sensor selection on: September 09, 2014, 07:14:45 pm
if I put a few drops of water it would register it and let me know there is water there.
Place paper that has been soaked in salt solution (then dried) on top of a wire grid.
One wire to ground one wire to a digital input.
56  Using Arduino / Motors, Mechanics, and Power / Re: Mechanism, Linkage, Gear Design on: September 09, 2014, 07:03:18 pm
Maybe some of the images link to what you want:
57  Using Arduino / Displays / Re: Large LED sign on: September 09, 2014, 06:48:58 pm
If you have local access to something that has addressable LEDs you can make one up.
Something using strips of these.
58  Using Arduino / Project Guidance / Re: Knowledges on: September 09, 2014, 06:40:00 pm
So there is no prerequisite knowledge ?
A desire to learn, helps to be logical.

buy a second board in case you destroy the first one
For the UNO, buy several controller chips as you will undoubtedly damage it/them (until you become proficient).

The IDE (Free Arduino development software package) has lots of examples with it.
Go though each and when you understand how each works you will become more competent.

You learn best by doing.
Also look at examples others have done to see how they solved problems.

Search for sites on the internet like this.

Pick up  a book or two:

When you get stuck with something, ask for help.
59  Using Arduino / General Electronics / Re: PCB manufacture - trouble aligning artwork on: September 09, 2014, 03:17:08 pm
My method:
- use an inkjet printer on Plotter grade overhead transparencies.
- only need to print the top and bottom layers ( No combining two transparencies for darker images is needed)
- use a "HP Officejet Pro 8600 Plus" printer. (what a stupid name)
- 100% alignment using this method (edit: using the alignment method described herein).
60  Using Arduino / Project Guidance / Re: Water Level Monitor Guidance Needed on: September 09, 2014, 10:30:25 am
10 mls  smiley-small
Maybe use a syringe and drive it with a stepping motor.
The number of steps moved would give you an indication of fluid used.
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