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1  Using Arduino / Motors, Mechanics, and Power / Lithium battery question [2x 3.7v with one control board] on: April 06, 2013, 07:04:27 pm



Any ideas how I would charge this one? It puts out 7~ volts, so they must be in series.  I have this basic charger for 3.7 lipos from sparkfun: https://www.sparkfun.com/products/10217 but I doubt that it will work with this one.

Thanks!


EDIT: tested the voltage between the COM and B port and it is ~6, I guess just the serial output of the two.
2  Using Arduino / Networking, Protocols, and Devices / Re: RN41-XV Bluetooth Module and Arduino FIO V3 on: March 25, 2013, 07:47:04 pm
Thanks for your reply!

I have been able to program it into the serial mode. But my second question still stands, what is the best way to see what the sketch might be outputting through the bluetooth device on a PC or MAC?

Thanks!
3  Using Arduino / Networking, Protocols, and Devices / RN41-XV Bluetooth Module and Arduino FIO V3 on: March 24, 2013, 03:21:09 am
Hello!

I am trying to setup the [https://www.sparkfun.com/products/11600] RN41-XV Bluetooth module with the Arduino FIO. I have been able to sporadically connect to and program the module, but everything is very inconsistent. My questions are:

  • What program should I use to set up the bluetooth module through the FIO.
  • How do I detect the serial write from the sketch via bluetooth on my windows pc? [What program do I use to just spit out whatever the paired bluetooth module is saying?]

Thank you for any help you can provide!

[EDIT: I am not trying to program the FIO via bluetooth, just send and receive data]
4  Using Arduino / General Electronics / Re: Using a low power relay as a simple switch on: February 28, 2013, 03:28:31 am
Just finished soldering and got this relay to function well. Currently I power it via the lilypad and a 1000mAH 3.7 lipo. Wish I could avoid the clicking sound though.

Thanks for clarifying the solid state relays. I have tried a transistor with this, but the other end of the circuit wasn't compatible with that method. :/

Thanks again.
5  Using Arduino / General Electronics / Re: Using a low power relay as a simple switch on: February 28, 2013, 03:14:27 am
Thank you mike!

After writing all that out and reading your post I realized that I should have been searching for how to wire the DPDT relay rather than the specific product itself.

As further reference the following seems like a good post as well: http://www.learningaboutelectronics.com/Articles/How-to-connect-a-double-pole-double-throw-relay-in-a-circuit

One more thing, are there any readily available low voltage solid state relays? [3.8v - 5v]
6  Using Arduino / General Electronics / Using a low power relay as a simple switch on: February 28, 2013, 03:03:04 am
I just picked up the following from my local store:

http://www.datasheetarchive.com/EE2-4.5NUX-datasheet.html

[ NEC EE2-4.5NUX ]

After doing quite a bit of searching I have not been able to find anything on how to use this low voltage relay. The datasheet is unfortunately very hard for me to understand.

All I want to do is switch another circuit on and off, but what are the six pins there? Which pin or pins do I power and which do I ground?

Here is a picture of the device, in case you have used this particular model:



EDIT: I have found a better schematic:



Not sure if that is accurate, but this device is a DPDT relay, can anyone explain the circuit there a little (primarily the N0 C NC pins)?

Thank you!
7  Topics / Science and Measurement / Re: Frequency Counter Library on: February 03, 2013, 06:19:07 pm
I got this to work well on one sensor, using my Arduino UNO.

But I have not been able to get it to work at all on a Leonardo. [ Serial doesn't even print the 'Frequency Library' line at the start] Have there been major changes to serial for Leonardo?

Another question is, how would I be able to expand this to multiple sensors without using multiple Arduinos?
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