daviddoria
New Member
**broken link removed**
(dont know why link doesn't work , you have to copy and paste)
so the TIL198 is just for isolation, pretend i didn't care if it was isolated... what i'm gathering is that the hdd input ("working") is connected to the ENABLE pin on the 4017... this makes sense.. so when that changes state it either starts or stops counting... but what i dont get is that +5 is connected to the ENABLE pin always... this doesn't allow for it to ever start counting... correct?
"The disable input should be low (0V) for normal operation. When high it disables counting so that clock pulses are ignored and the count is kept constant." (from http://www.kpsec.freeuk.com/components/cmos.htm#4017)
can any one explain this?
david
(dont know why link doesn't work , you have to copy and paste)
so the TIL198 is just for isolation, pretend i didn't care if it was isolated... what i'm gathering is that the hdd input ("working") is connected to the ENABLE pin on the 4017... this makes sense.. so when that changes state it either starts or stops counting... but what i dont get is that +5 is connected to the ENABLE pin always... this doesn't allow for it to ever start counting... correct?
"The disable input should be low (0V) for normal operation. When high it disables counting so that clock pulses are ignored and the count is kept constant." (from http://www.kpsec.freeuk.com/components/cmos.htm#4017)
can any one explain this?
david