pimping the board

A project log for MMR-70 - cheap radio module

some experiments with the fm module that features an atmega32

davedarko • 09/12/2015 at 15:51•4 Comments

I thought about using the Talkie library for arduino with this module, inspired by #Gas Sensor For Emergency Workers , but it is written for 16 MHz and I would have to deal with timers (again). 16MHz resonators are ordered - although I'm not certain that the atmega32L will work properly at 16MHz and 2.8V. I will look into that, but will also order 8MHz resonators as well and maybe a new LDO for 3.3v? I'm also waiting for some 2x3 pin headers for easier programming via an ISP connector and might make a labeled board... idk.

Previous log

program progress

09/04/2015 at 08:50 • 5 comments

Discussions

Alex wrote 09/13/2015 at 08:14

The frequency is lower than 8MHZ with a supply voltage lower than 5V. At 2.8V it is ~7,2MHZ [Datasheet Figure 190]

Are you sure? yes | no

davedarko wrote 09/13/2015 at 08:40

the internal? Interesting, never thought of that.

Are you sure? yes | no

Alex wrote 09/13/2015 at 09:17

take a look at p.317:

http://www.atmel.com/Images/doc2503.pdf

Are you sure? yes | no

davedarko wrote 09/13/2015 at 06:49

Hm, I could also use the internal oscillator to put it into 8MHz mode. Gnragh, more crystals in the crystal box :D

Are you sure? yes | no