Witam
To znowu ja. Wiem ze sie cieszycie ze tak bardzo chce zrozumiec co nieco przy waszej pomocy. Obiecuje ze szybko nie zrezygnuje z nauki ;--P
No ale do konkretow. Specyfikacja NE555. Probuje zrozumiec co jak sie dzieje i dlaczego sa takie wyniki operacji. Glownie chodzi o zrozumienie pracy monostabilnej/astabilnej.
Ponizej pytan zalaczam tekst, bo pytania wyrwane z kontekstu czasem trudno zrozumiec. Zaczne od "monostable":
- [wers 2] application of negative-going pulse to the trigger zgloszenie negatywnego impulsu na przerzutnik (?) czy zastosowanie biegnacego w drgua strone impulsu
- [wers 3] sets the flip-flop (Q goes low) znalazlem w slowniku ze trigger to przerzutnik lub flip-flop, zamieszanie ';--|
- [wers 3/4] voltage across the capacitor napiecie na kondensatorze (?)
- [wers 6/7] the output of the threshold comparator resets the flip-flop (Q goes high) wyjscie komparatora resetuje flip-flop (?), ale co to w praktyce oznacza? co to jest ten flip-flop?
- [wers 14] charge rates (?)
- [wers 17] negative-going trigger pulse (?)
- [wers 19] positive edge of the reset pulse (?)
============== BEGIN ================== monostable operation
[ W E R S 1] For monostable operation, any of these timers can be connected as shown in Figure 9. If the output is low, application of a negative-going pulse to the trigger (TRIG) sets the flip-flop (Q goes low), drives the output high, and turns off Q1. Capacitor C then is charged through RA until the voltage across the capacitor reaches the threshold voltage of the threshold (THRES) [ W E R S 6] input. If TRIG has returned to a high level, the output of the threshold comparator resets the flip-flop (Q goes high), drives the output low, and discharges C through Q1.
Monostable operation is initiated when TRIG voltage falls below the trigger threshold. Once initiated, the sequence ends only if TRIG is high at the [ W E R S 11] end of the timing interval. Because of the threshold level and saturation voltage of Q1, the output pulse duration is approximately tw = 1.1RAC. Figure 11 is a plot of the time constant for various values of RA and C. The threshold levels and charge rates both are directly proportional to the supply voltage, VCC. The timing interval is, therefore, independent of the [ W E R S 16] supply voltage, so long as the supply voltage is constant during the time interval. Applying a negative-going trigger pulse simultaneously to RESET and TRIG during the timing interval discharges C and reinitiates the cycle, commencing on the positive edge of the reset pulse. The output is held low as long as the reset pulse is low. To prevent false triggering, when RESET [ W E R S 21] is not used, it should be connected to VCC. =============== END ====================
ps Czy wszyetki noty sa po ang czy sa dostepne takze pl?