3 replies to this topic

[Dr Who]

Hello!

The Netduino model 1 (and probably the model 2) are powered via the USB port during development. However there is a barrel style connector on it to the right of the USB one. I've powered it via 5.5 volts, (4x1.5 v AA cells) However for this latest design I'm planning on using a pair of LiPo battery packs.

 

They are a pair of Polymer Lithium Ion Batteries at 1000mAh https://www.sparkfun.com/products/339 who produce 3.7 volts during a normal operation. 

 

And they have their own charger attached https://www.sparkfun.../products/10217 .

 

Does the board have its own regulator for being powered between 7 and 9 volts via the barrel connector?

 

As it happens the same company, Sparkfun makes a LiPower Shield for the Arduino, which is located at

https://www.sparkfun.../products/10711

 

[jrlyman3]

The specifications (http://www.netduino....duino/specs.htm) say 7.5 - 12 volts on the power connector (as opposed to the USB connector).

 

I usually run them at 9 volts.

 

3.7 * 2 = 7.4 which is a little short but it might work.

[CW2]

Does the board have its own regulator for being powered between 7 and 9 volts via the barrel connector?

 
Yes, there is MC33269DT-5.0G linear regulator (datasheet pdf). It has typical dropout voltage ~1 V (max 1.35 V at 800 mA), which means you have to provide at least ~6.5 V input to have stable 5 V output. Absolute maximum input voltage is 20 V, the recommended ~7 - 12 V range is to minimize power losses - the higher input voltage the higher power has to be dissipated as heat.

[Dr Who]

Hello!

Okay group. I've given the both of you some serious thought, and will indeed have an appropriate solution working when the time comes.