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1  Using Arduino / Project Guidance / Re: Arduino Powered RC Sailboat on: August 30, 2014, 08:17:57 am
I would need to pair with a someone skilled in woodworking and have their own equipment.  Between the both of us, maybe a quest to build 1 or 2 and see if they sell.  I'd have to have tight seals to make it waterproof.  You think guys would buy these at a 1000% markup?  I mean there would be a lot of time and effort building the boat and software.  Then improve on the idea as we gain more experience.
2  Using Arduino / Project Guidance / Arduino Powered RC Sailboat on: August 28, 2014, 06:13:54 pm
Would it be feasible to build nice wooden sail boats with cloth sails and the finest details AND incorporate the arduino uno + motor shield + battery?  Think of the possibilities one could add to the boat...a cannon, a laser pointing 50ft in front of the boat to the water, led light show. Maybe a couple arduino's because the sketches will be too big.  I've seen old fogies playing with their RC sailboats down in Maryland.  I bet they paid big money for their boats by one or two guys around.
3  Using Arduino / General Electronics / Re: 9V Energizer Recharge Battery on: August 24, 2014, 03:53:16 pm
thx for the info!
4  Using Arduino / General Electronics / Re: 9V Energizer Recharge Battery on: August 24, 2014, 06:50:04 am
ok, you guys are right.  I should be looking into lipo batteries for a higher amp discharge.  I will return the unopened package with 9v. thx
5  Using Arduino / General Electronics / Re: 9V Energizer Recharge Battery on: August 23, 2014, 08:40:20 pm
i have a device called the Ten's Unit.  It is a nerve simulation device.  I thought with rechargeable batteries you can get a higher mA discharge over normal alkaline batteries.  It says this battery can be charges a hundred times.  I could build it into a circuit where I charge when needed, but normally power a device, such as a 16x2 lcd screen.  More or less just trying to understand power management to the T.
6  Topics / E-Textiles and Craft / 10's Unit Electrodes on: August 23, 2014, 05:06:35 pm
Has anyone tried to make self-adhering fabric electrodes?  Or has tried to mimic the prescribed device BodyMed Transcutaneous electrical nerve stimulator?

http://tensunitelectrodes.com/
7  Using Arduino / General Electronics / Re: 9V Energizer Recharge Battery on: August 23, 2014, 04:33:41 pm
6 cells ok!  so really i don't even need a power management chip!  I just need to program the arduino to measure the voltage and stop charging the battery when the battery is almost full.  However, the power management chip monitor temperature, voltage, and charge time.
8  Using Arduino / General Electronics / Re: 9V Energizer Recharge Battery on: August 23, 2014, 04:09:41 pm
I'm thinking this other circuit from Maxim Integrated.  There are no specs on Energizer's website, which I find to be funny.  Is this a 1 cell battery?  I know it is a NIMH battery.  I'm thinking the general safety guideline is to charge a battery less than its rating in mAh.

http://www.maximintegrated.com/en/products/power/battery-management/DS2710.html
9  Using Arduino / General Electronics / 9V Energizer Recharge Battery on: August 23, 2014, 01:18:21 pm
I bought a 9V 175mAh rechargeable battery.  I want to be able to recharge this battery using the arduino and a chip like the Max1811 by Maximin Integrated.  However that chip is labels for 4.1v and 4.2v batteries?  Can I charge a 9v battery using this still?  I'd send a low signal to the chip so I'm only charging at 100mAh being a safe charge rate for this 175mAh battery.  Is there a better chip?
10  Using Arduino / Programming Questions / Program For 2X Font Size Is Giving Me Problems! on: July 29, 2014, 08:54:09 pm
I'm trying to program this company logo with a double size font.  You can see the dot on the 'i' slants over toward the first 't'.  I programmed by blocks LT - left top, RT - right top, BL - bottom left, BR - bottom right.  I have 8 blocks across a 16x2 LCD display.  I can't even get the first LT section of the block to work.  What's going on here?  Thanks for any help.
11  Using Arduino / Displays / 2x16 LCD SCREEN - NEED FOR 2X SIZE LETTERING on: July 20, 2014, 04:55:14 pm
I'm trying to display letters/characters using 2 rows of space.  Is this possible on a 2x16 LCD screen?  I wouldn't care if each letter took up 2 vertical spaces or 4 block spaces as long I knew what I'm working with.  Right now I'm using the LiquidCrystal library and it's functions within it.  Thanks. smiley-lol
12  General Category / General Discussion / What Application Is Used to Draw Sketches For Arduino? on: April 30, 2014, 01:13:43 pm
What Application Is Used to Draw Sketches For Arduino?  Like in this picture ->

13  Using Arduino / Project Guidance / Re: Green Laser 3VDC Ebay on: April 23, 2014, 07:03:15 am
Ok, I'll give it a try.  Thanks for the information!  smiley-cool
14  Using Arduino / Project Guidance / Re: Green Laser 3VDC Ebay on: April 22, 2014, 11:28:14 am
How can I switch this 3v laser on/off using the blink example?  I'm curious because there is no communication wire from the lazer.  smiley-slim
15  Using Arduino / Project Guidance / Re: Green Laser 3VDC Ebay on: April 22, 2014, 08:11:21 am
I found out the ebay seller from China wired black (-) and red (+) backwards.  It works with 3v (2 x AAA batteries).  Is there a cheaper way to step down from 3.3v to 3.0v without buying the step-down voltage chip?  I don't want to over work this laser. 
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