It does not matter which switches you use for S0 and S2. 1 & 4 is OK.shermaine said:hi guys,
i make a mistake. The voltage is same for pin 9 of u2a and pin 8 of u1c. they are 4.4v. As for pin 8 of u2a , it is 0.1v. Guys, is there any thing wrong with the dip switch connection? Please advise. Thanks.i'm making use of pin and pin4 only. is that correct?
Just check that D0 goes from High to Low when S0 is closed and that D2 goes from High to Low when S2 is closed.
Is the oscillator working????
I suggest you measure all of the voltages and post the circuit again with them marked on it.