Hi friends: I got a serious problem with 74LS123. 74LS123 has been configured as following: 1CLR-----VCC 1A-------GND 1CEXT----100PF( one pin is conected to GND ) 1REXT----120K 1B-------INPUT 1Q-------OUPUT Input keeps changing from 1V to 3.5V repeatedly. Why this chip can not be triggered? Beg for you help....
Sounds like you need a Schmitt Trigger, rather than a monostable? Anyhow, what has any of this got to do with Keil software tools...?
so sorry friends... I am using keil c51 to development my project and here is the only place which can appear in my mind right now... Thank you and have a good weekend...