| ??? 03/24/08 20:00 Read: times |
#152495 - Hello Erik,Hello Kai, Responding to: ???'s previous message |
Hello Everybody,
Hello Erik,Hello Kai, Welcome.Regards. Remember that relays need a minimum current to get the contacts reliably closed. Kai Yes Sir.Relays in this project are only in remote control receivers,each has one,each consumes around 24/3000=8mA,thank God,otherwise it would have been difficult to manage in TRFless design.Since relays will be dead on or off for long time I can afford much more than normal debounce-delays before accepting their active or inactive states and yet manage the 10-extetrnal inputs(relays) plus 10 onboard inputs(tactiles) polling loop in a couple of seconds which I think is reasonable. Now how much is those couple of seconds in different situations is the headache. My respected teachers,I am sorry,SPECIFATIONS nowadays are vague.It becomes my duty to design the problem and solve myself based on actual user's choice. Hence comes the question how to notify the user at central detector about the inputs:one is 7seg.10 such 7segs are going to consume 10 pins.So 30 pins are gone. Another vehicle to notify the user will be audio,the user did want some better musical sounds.But the music SHOULD NOT continue for long,be it for one relay or several relays.Here is the problem Michael.The music consuming my two timers must be enabled and disabled by two different stimulii,one, end of programmed duration AND/or two,tactile switches. That is why I asked why 10 tactiles should be necessary? Any one or all connected parallel(cheat) should do. I am sorry for difficult and lenthy question.You have to read and read I am afraid. But your responses are highly encouraging.Please find fault in my assumptions and logics and kindly advise. As it stands now no "rapid respinse" and no " '14 schmitt".. Am I wrong? With best regards A.S.Rudra |
