Re: I need some peggy advice please.

Home Evil Mad Scientist Forums LED Matrix Kits I need some peggy advice please. Re: I need some peggy advice please.

Windell Oskay

The Peggy 2 (or 2LE) can do it, but it is indeed overkill. Probably the most straightforward way to use it would be to wire up 6 rows rows of 10 LEDs each, meaning that you’d need to run a total of 16 wires to the Peggy.

The Peggy 2 is 11.320×14.875″ in overall size:

You might prefer to use the Peggy 2LE instead, as it is smaller (9.625×5.9″) and lower in cost:

The Peggy 2 comes with a 3xD battery holder. One can be added separately to the Peggy 2LE as well:
I’d estimate battery lifetime under this set of circumstances as about 150-250 hours if the LEDs are on all of the time, and 2-5 times that if the LEDs are flashing intermittently.  I’d certainly recommend turning it off when not needed or (much better) using a plug-in power supply.
Since you don’t need all that many LEDs, and they don’t need to be on all the time, you might consider using Charlieplexing, directly from a microcontroller, to drive the LEDs instead.   For 60 LEDs, you could do this with a microcontroller board like our Diavolino, using 9 digital output lines to drive a hand-wired matrix.  For a bit more about Charlieplexing, see our article about how the Bulbdial Clock works: