AVR-Chat

On Feb 2, 2016, at 3:20 PM, wolfram_s@hotmail.com [AVR-Chat] <AVR-Chat@yahoogroups.com> wrote:

> The task I have is relatively straight forward,
> 
> A 0.5 second timer, that makes the processor advance through a table (probably each row a byte) and according data turns an LED connected to a given IO pin on or off.  The 'table' will have 0.5 hr worth of data and when the end is reached will cycle through again.  I may require from 16 to 20 output pins.
> 
> If ready made modules are available that can be programmed via USB it will be better still.   I have enough soldering to do without making up SMD boards, because there will be a number of these required.
> 
> Any suggestion I will be most grateful for.

Quite frankly most any AVR will do. Many are still available through-hole and need little more than 3.3 - 5.0 volts. And capable of directly driving high efficiency LEDs to interesting levels of brightness.

But when you add USB to the equation things get many orders of magnitude more complex. 

A bare chip needs something like a JTAGICE mkII. An AVR Dragon is lower cost and may have all you need.

Arduino is an environment supported by many vendors of prebuilt boards complete with development environment for programming and ICE. Probably the best place for a one-off design. Would be easier to get USB than working from bare metal as described above.

--
David Kelly N4HHE, dkelly@HiWAAY.net
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Whom computers would destroy, they must first drive mad.