Hi,
I want to do a small project, and find it difficult to choose the right version of LaunchPad.
I hope I can get some help here.
I'm looking for the cheapest LaunchPad which can be used for my project.
The project is a metronom - the tool that "beats" (vie click/lights) X times in a second,
just like this one:
(excpet that the "tap" on my project will be using button, not microphone)
I just want to try and do one by myself.
The requirements are:
1) Internal clock should VERY accurate, with 200 Beats Per Minute.
2) Need to controls 3 "7 segment displays"
3) Need to control 1 led to indicate the beat
4) Use some "piezo speaker" to make the beep, e.g https://www.sparkfun.com/products/7950
5) Control speed using "rotray encoder". eg https://www.sparkfun.com/products/9117
6) Should work on 9V battery
I have a lot of experince in in programming (c/c++),
but not with embedded systems.
Question #1
===========
Do I need to buy the "real time" version for the timing accuracy ?
On the simple "MSP-EXP430G2" it just says "2 16-bit Timers"
(http://www.ti.com/ww/en/launchpad/launchpads-msp430-msp-exp430g2.html#tabs)
I need a timer that will_not- be affected from the state/voltage of the battery
Question #2
===========
For 3 "7 segment" I need already 21 controls pins,
so does it mean that I need some kind "booster pack" ?
If you can refer me to the specific model I need that will be great.
Thanks a lot for any help !
Regards.