i2c monostable

nicofer · Joined: 01 May 2013 Posts: 90 Location: GRJ

Hi
I need a programmable monostable - similar to a 555 one shot - but I want to be able to change the pulse length .

Time delay between 0.5 sec to about 10 seconds but that is not critical .

Active high input trigger.

The WWW and Google was not very helpful .

BASCOM to the rescue !

I am thinking about a TINY AVR with I2C slave lib - to set the time delay - one input pin for trigger and then one pin for output .
One byte time delay range is fine.

Any ideas on the best small AVR and slave lib combination for this ? ( 8 pin if possible )

Kind regards
Nico

(BASCOM-AVR version : 2.0.8.4 )

Meister · Joined: 27 May 2010 Posts: 319

Here is Arduino code:
https://github.com/bigjosh/TimerShot/blob/master/TimerShot.ino
Should not be difficult to translate to Bascom because the timer settings are well commented.
The pulse can be triggered only by calling the function
OSP_SET_AND_FIRE(o);
so triggering will flicker somewhat.
The "xtinies" reportedly have a one-shot incorporated in hardware.

For the Xmega I had provided a solution in this forum several years ago.