Wanna Select Best external power supply

Am going to make a device with FEZ hydra,a compass module,a camera module,GSM module,Bluetooth module,motor controlling module and gyro module…am going to use USB client DP module too, what is the best external power supply method for this? this device should work at least 2, 3 hours continuously… and also with motor controlling modules am using a vibrator only…GSM module must work throughout the all time device enable what will be the best EXTERNAL power supply method?

Look this China brand

I normally use in industrial environment 24V/12V/5V since long time and I had good results. They are not very tiny, but good price.

I don’t think there is a ‘best’ power supply but rather your requirements should lead you to a few good choices.

So you want battery power?

yes i want to use battery power coz am going to make a smart device …

Then you need to pick a battery !

Batteries have almost infinite varieties. They all have different uses, they all have different handling requirements.

You have some key information you know, that you can use to look at options. For instance, you need around 7v, to be regulated back down to the 5v in the DP module. That’s an easy measure and an interesting one to use when purchasing.

But you also have a fundamental challenge here. You are planning on using a number of different modules that also have many variables that nobody here can predict, so knowing how much they will consume will be next to impossible to show without experimentation. My suggestion is get all the equipment and start measuring their draw once you have your code working, and then start to talk about battery configurations that might suit.

While you’re waiting for all this, duck over to Dave’s site and watch his battery capacity tutorial that might help you get your mind around some of the challenges batteries pose http://www.eevblog.com/2011/01/23/eevblog-140-battery-capacity-tutorial/

I’m using one of these:


As it gives me a solar option as well (I’m using two 5W panels with it).

Where can I buy extra module connectivity cable for FEZ Spider?

check the GHI catalog under gadgeteer prototyping

thanx mike

mike do u know about the distance and obstacle identification sensors that can use with fEZ spider main board?

I have not seen any Gadgeteer distance sensors yet, but I would not be surprised if GHI announced something soon.

i heard that we can use sensors with extender modules,i mean like ultrasonic sensors…do you have any experience ?

can i connect ultra sonic sensor via extender module?if yes which ultrasonic sensor is the best for this?

@ niyomal

Yes, you can use sensors with a Gadgeteer extender module (or @ ransomhall’s MakeBread Module at http://wiki.tinyclr.com/index.php?title=Community_Offers).

You’ll need to check the datasheet for the sensor to figure out how to wire it up, whether it operates in the right voltage range (Gadgeteer has both 5v and 3.3v supply available on the extender), etc.

The datasheet should also include information on what voltage the sensor will output based on a given distance, relative to the specified supply voltage.

I have never worked with ultrasonic sensors, but I have worked with infrared sensors. Infrared sensors have a detection range. Some are made for closeup and other far out. If sonic sensors have different ranges, then you will need to determine what is best for your application.

Google ultrasonic sensors.

I’ve not used them with Gadgeteer but with my FEZ Domino:

Sharp IR (there are drivers by MarkH in the Code section of TinyCLR) seem to the popular choice.


Maxbotix and Parallax are available for Ultrasonic. The Maxbotix has drivers in the Code section as well (iirc also by MarkH).

I’ve been using an ultrasonic ranger from maxbotix with the fez spider and it’s been really easy.

I’m using an extender and reading the PWM using the pincapture on ghi.hardware. In order to get it a bit more accurate I used a resistor and capacitor to get a clear power source. maxbotix are great because you only need to power it and then read the pwm - there is no other set up required.

The code for reading it is here if you need it: http://www.tinyclr.com/forum/21/6468/