Author Topic: wireless / rfm12b (yet more n00b questions) (Read 3705 times)

dagb · « **on:** September 02, 2012, 01:23:07 pm »

It appears you have left out the 3.3V pin?
How do you intend to drive the rfm12b shield, which requires 2.2V-3.8V?
PWM? Sorry if the answer to this is obvious, I have very little exposure to Arduino so far.

Do you expect our Asian friends to start shipping knockoffs of these by Christmas? :-)

fraguada · « **Reply #1 on:** September 04, 2012, 02:01:43 pm »

From the kickstarter:

RFM12B wireless Shield PCB - added 8/27

Note: This shield is experimental, it is known to work with the Digispark and ATTINY85s but may require some tinkering. For that reason we are only offering it as a PCB. It requires the RFM12B Module (https://www.sparkfun.com/products/9582), 3x 10k resistors, 3x 4.7k x resistors, a 10µ capacitor, and a 0.1µ capacitor. It will use 5 pins (leaving 1).

Aren\'t all these resistors and caps enough to regulate the 5v down?

dagb · « **Reply #2 on:** September 05, 2012, 10:39:33 am »

That would make sense, yes.

yukivx · « **Reply #3 on:** October 05, 2012, 09:18:25 am »

I chose the RFM12B wireless Shield PCB. However, I may not be able to handle it...

When I want to build wireless network in Digispark, do I need two RFM12B wireless Shield PCB?

digistump · « **Reply #4 on:** October 05, 2012, 10:58:06 am »

You\'ll need two modules to communicate between two Digisparks, or a module hooked to another device.

Re 3.3V - The kickstarter info is outdated at this point, we\'ve updated the board to include a 3.3V regulator as well, since the Digispark board does not have 3.3v on it.