I/O ports problems
 
Notifications
Clear all

I/O ports problems

3 Posts
1 Users
0 Reactions
10.4 K Views
(@argelia)
Posts: 11
Active Member Guest
Topic starter
 

I am using a sm2315dt'I/o ports as an outputs to energizade some selenoids, their initial states have to be 0 because at the begining of the program i turn off all the ports, but here is the problem, everytime I turn on the motor their states are 1 for few seconds activating the selenoids, is it posible to avoid that?

pd: I/O ports activate some transistors which turn on the selenoids.

 
Posted : 03/12/2012 8:28 am
(@csearcy)
Posts: 316
Reputable Member Guest
 

This is hard to avoid. One approach is to use a time delay relay or another output to enable power to the solenoid circuits.

 
Posted : 05/12/2012 9:12 am
(@argelia)
Posts: 11
Active Member Guest
Topic starter
 

we already fix the problem, we have to use some voltage divisors along with some diodes at their respective transistor's base

 
Posted : 10/12/2012 12:14 pm
Share: