how is this resistor relevant? (noob question)

[haggai shapira]

the 10kOhm resistor: why is it blocking current to pin 7? its not in the way

 

[Bluejets]

Do a google on pull-up, and in this instance, pull-down resistors.

 

[davenn]

the 10kOhm resistor: why is it blocking current to pin 7? its not in the way

it isn't


Whilst I was searching the datasheet for more info, bluejets has responded with part of the situation

here's my Q to you @haggai shapira --- why would you comment on that one on pin 7 but not the same situation on pin 2 ??

Dave

 

[davenn]

have a look on the bottom of page 11 and the top of page 12 of the datasheet for what pin 2, pin 7 and pin 1 do for your circuit

http://www.ti.com/lit/ds/symlink/l293.pdf

 

[BobK]

Spoiler: low pins

The resistors are making the input on pin 2 and pin 7 low when the button is not pushed. If they were not there, the pins would be floating. A floating pin is NOT the same as pin connected to low. On some types of logic, a floating pin can actually disrupt the operation of the entire chip.

Bob

 

[davenn]

Bob

Bob

I have hidden you response ... you may not have noticed that we were trying to teach the person to
do some discovery for themselves , rather than some one handing out the answer