Hi all
I am new on here and may not be in the right section, but here goes anyway.
This one is related to computers: Is there a program or application written that will produce a momentary high (assertive +12v) on the RTS (or DTR) pin (relative to the ground pin) on the com port on a PC (running XP Pro), after certain periods of time.
I need to be able to enter four sets of h/mm/ss times that, when reaching zero after counting down, cause the rts (or dtr) pin to go momentarily high, thus there will be four pulses issued as each counter in turn reaches zero. These four timings would all start together, as if the timers are all operating in parallel. The duration of the output pulse isn't critical, 250-500ms is fine.
Settings, for example, might be: Timer 1 - 00h:03m:18s, Timer 2 - 00h:08m:51s, Timer 3 - 02h:00m:30s, Timer 4 - 02h:06m:10s.
The com output pin will be coupled to an external controller incorporating a npn transistor to close a relay.
The timing needs to be started via the serial port also, possibly by grounding the DSR pin.
The initial timing start would not be related to time of day i.e can be started anytime.
Hope someone can help me or perhaps direct me to a more appropiate site for this project.
Thanks
I am new on here and may not be in the right section, but here goes anyway.
This one is related to computers: Is there a program or application written that will produce a momentary high (assertive +12v) on the RTS (or DTR) pin (relative to the ground pin) on the com port on a PC (running XP Pro), after certain periods of time.
I need to be able to enter four sets of h/mm/ss times that, when reaching zero after counting down, cause the rts (or dtr) pin to go momentarily high, thus there will be four pulses issued as each counter in turn reaches zero. These four timings would all start together, as if the timers are all operating in parallel. The duration of the output pulse isn't critical, 250-500ms is fine.
Settings, for example, might be: Timer 1 - 00h:03m:18s, Timer 2 - 00h:08m:51s, Timer 3 - 02h:00m:30s, Timer 4 - 02h:06m:10s.
The com output pin will be coupled to an external controller incorporating a npn transistor to close a relay.
The timing needs to be started via the serial port also, possibly by grounding the DSR pin.
The initial timing start would not be related to time of day i.e can be started anytime.
Hope someone can help me or perhaps direct me to a more appropiate site for this project.
Thanks