pilo Posted June 16, 2003 Report Posted June 16, 2003 I made the LTC, juste for the 2 leds and... they're always on!!! I use a 74LS00, but I don't think the speed here is important (it is with DIN and DOUT? we can't use LS instead of HC?).if someone have the answer of this problem... I try to change the 74LS00.. but the same so...
pilo Posted June 18, 2003 Author Report Posted June 18, 2003 Oky I fix it... but...i change the value of R3 and R4 to 4.7k...!!! I was surprise by the 100k... and I take my old book of digital schematic, and there they made the same monoflop with a 400ohm...
TK. Posted June 18, 2003 Report Posted June 18, 2003 Than lower the R*C value, than shorter the delay time of the monoflop. However, it's not clear to me why 100k wasn't working, maybe you are using a bigger capacitor?Best Regards, Thorsten.
pilo Posted June 18, 2003 Author Report Posted June 18, 2003 No I use a 10µF caps... maybe the 74LS00? I didn't change the caps, it works well with 4.7k and 10µ... ;) I was just worried because I study monoflop circuit and I wasn't able to make it works! ;)Thanks!
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