burnishedcrystal
Newbie level 3
Hi,
I am conducting Digital Logic Design LAB. I have taught them using pull-down resistors giving inputs to gates. But there is one confusion i have when giving an input (e.g., label A) to multiple gates' ICs can i use a single pull-down resistor or should i use separate pull-down resistors for separate gate e.g, i am giving an input A to a 74ls86 IC with a pull-down resistor of 1k ohm. If i am giving the same input to 6 different gates then should i use a single pull-down resistor and reduce the value of the resistor to adjust it according to the low level logic? or should i use separate 1k resistors to give inputs to separate gates?
I do not have idea if i reduce the value of pull-down resistor how much should i reduce it to avoid any other problem like heating etc.
Please suggest me accordingly so that i can give reference to students.
Thanks
I am conducting Digital Logic Design LAB. I have taught them using pull-down resistors giving inputs to gates. But there is one confusion i have when giving an input (e.g., label A) to multiple gates' ICs can i use a single pull-down resistor or should i use separate pull-down resistors for separate gate e.g, i am giving an input A to a 74ls86 IC with a pull-down resistor of 1k ohm. If i am giving the same input to 6 different gates then should i use a single pull-down resistor and reduce the value of the resistor to adjust it according to the low level logic? or should i use separate 1k resistors to give inputs to separate gates?
I do not have idea if i reduce the value of pull-down resistor how much should i reduce it to avoid any other problem like heating etc.
Please suggest me accordingly so that i can give reference to students.
Thanks