Hi, I'm new to circuits and need some help!
I have a parallel port sending data to a machine, the data is sent in strobed word format (set data pins, then flash pin1 lo hi lo to store the word). I'd like to put an LED inline on pin1 so that I can see when data is being written. The problem is that the strobe flash is so quick that you can't see the LED light up. Is is possible to have the strobe flash trigger a circuit that will drive an LED for 10-20ms?
The strobe pin1 is 0v low, 2.3v high, about 20mA, and I have a 5v line coming in to power this and other stuff. I know logic circuits but almost nothing of electronic components, so if you could please describe whats going on and the components that are responsible for the timing values I'd be very greatful.
Thanks!
I have a parallel port sending data to a machine, the data is sent in strobed word format (set data pins, then flash pin1 lo hi lo to store the word). I'd like to put an LED inline on pin1 so that I can see when data is being written. The problem is that the strobe flash is so quick that you can't see the LED light up. Is is possible to have the strobe flash trigger a circuit that will drive an LED for 10-20ms?
The strobe pin1 is 0v low, 2.3v high, about 20mA, and I have a 5v line coming in to power this and other stuff. I know logic circuits but almost nothing of electronic components, so if you could please describe whats going on and the components that are responsible for the timing values I'd be very greatful.
Thanks!