A monostable is not required as the PPS pulse width is 200millisec wide. The PPS pulse can either stop when the timing error is too high/too few satellites etc., or it can be configured to continuously output. Since the M12+T can be configured for either a 100Hz output or a 1PPS output using a monostable adds unnecessary complication.
If the buffered PPS output is intended to drive 50 ohms a driver that has a clean output that doesn't produce aberrations of 20% or so due to ground bounce would be nice. Bruce Hal Murray wrote: >> Specifically it would provide regulated 5 and 3 volts, a MAX3232 chip >> for level translation, a buffered 1PPS output, and LEDs to indicate >> power and 1PPS heartbeat. Some or all the components would be SMDs. >> This could be an assembled board or a kit. >> > > >> If this looks promising, I would be interested in what other features >> would be desirable. >> > > How wide is the PPS? If it's tiny (10 microseconds) some serial port setups > won't catch it. If so, a one-shot pulse stretcher would be handy. > > Does the PPS signal stop ticking when it runs out of satellites? If so, I > think you can use the other one-shot in the package so that the LED is on > when the PPS is ticking and blinks when the PPS is off. and is off if there > is no power). > > > > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
