Three input OR alarm. 2 with 1.5volt on-state;1 with compar. output
Three input OR alarm. 2 with 1.5volt on-state;1 with compar. output
(OP)
I need to disable a fuel solenoid on a diesel engine when one of 3 OR'd LED signals is in alarm.
1st monitored LED signal (oil pressure low).on state= 1.5vdc
2nd monitored LED signal (no alternator output). on state=1.3vdc
3rd signal is (coolant temperature). Must have add'l circuit to monitor for voltage drop across x-ducer and create alarm condition when voltage drop is less than 5.5volts dc.
Conditions:
1.Alarm signals may be from a flashing LED i.e.pulsing 1.5v state.
2.All LEDs must be OFF 1st before alarm circuit is enabled.
Thanks to anyone who can help.
3.solenoid is 12vdc ~100mA.
1st monitored LED signal (oil pressure low).on state= 1.5vdc
2nd monitored LED signal (no alternator output). on state=1.3vdc
3rd signal is (coolant temperature). Must have add'l circuit to monitor for voltage drop across x-ducer and create alarm condition when voltage drop is less than 5.5volts dc.
Conditions:
1.Alarm signals may be from a flashing LED i.e.pulsing 1.5v state.
2.All LEDs must be OFF 1st before alarm circuit is enabled.
Thanks to anyone who can help.
3.solenoid is 12vdc ~100mA.





RE: Three input OR alarm. 2 with 1.5volt on-state;1 with compar. output
RE: Three input OR alarm. 2 with 1.5volt on-state;1 with compar. output
How much should the circuit cost? (nothing and as little as possible are not options)
How much have you to spend on doing the design?
Do you want a Hardware solution? - requirements are stable with time. Hardware is expensive to change but, in most cases less expensive to implement)
Do you want a Software based solution? - Requirements may change over time. (PIC, 8051, ***)
I will follow thread to see if I can help.
RE: Three input OR alarm. 2 with 1.5volt on-state;1 with compar. output
Good Luck!