Re: LED control circuit


"gstringe" <egnirts@xxxxxxxxxxx> wrote in message
news:1147982860.990841.194660@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
This will probably be easy for you folks who do this all the time and
are up on what is available IC wise.

I want to sequence an LED thru modes with a push button. It will
sequence like this: on, flash, off, on, flash, off etc.

I would supply steady power and flash power to a bus maybe as there
will be a lot of LEDs to control.

Any clever ideas out there?

Many thanks for the help.


Bite the bullet and use a micro! I'd use a small Atmel AVR microprocessor
such as ATtiny13 (8 pin dip with internal oscillator) for around $1.50,
download the free evaluation version of CodeVisionAVR from www.hpinfotech.ro
which is code size limited but won't effect you for this app, buy a cheap
programmer (ATAVRISP MK II), and write your program in C using the example
programs as a guide. Go on, it'll be worth it! As an aside, CoveVisionAVR is
one of the best and easiest to use C compilers I've come across -
inexpensive, feature packed and very well supported. Worth paying for the
full Standard version IMO. The AVR is also very much suited to C code.
Buffer up the output with N-MOSFETs such as 2N7002 or use logic buffers.

Mark.



.