One, this semester to do this using a button control three relay, the schematic diagram, right? For each answer,

CodePudding user response:

Shed light on how a button control three relay? According to the control one at a time relay?

CodePudding user response:

The simulation diagram should have no problem

CodePudding user response:

Press 1 for the first time relay, the second 2 relay, 3 relay to open the third time, fourth time fully open, can be achieved with this picture

CodePudding user response:

Open your so-called refers to relay and off? The IO port output low level?
Can be sure,

CodePudding user response:

The main function to judge

 
While (1) {
If (k==0) 
{
Unsigned int a=22222; While (a -); 
if(! K) 
{
If (p0==255) p0=223; 
If (p0==223) p0=191; 
If (p0==191) p0=127; 
If (p0==127) p0=255; 
} 
while(! K); 
}}