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I'm not saying that all LM324s will slew this fast. I'm just sayin'.I tested the circuit with a lousy old LM324 made by TI. I used a 33Ω load. The output slewed from 0 to 5V in 16usec, and from 5V to 0V in 16usec.
Actually, 5V/16usec is only about 0.3V/usec, which is reasonably close to the graphs in the TI datasheet.National Semi made all the old LM324 opamps. TI started making them recently. Maybe TI ones are better than the old ones. But their datasheets are the same as the old ones.
You forgot to say WHAT KIND oF CAPACITOR!!I am using non-electrolytic capacitor as timing capacitor connected to pin 7 of 555. Is it OK?
Don't forget that a switch has contact bounce. When the switch is turned on then its contacts bounce and make and break over and over creating many pulses. A contact debounce circuit might be needed.
More parts, obviously...Here is another one...
hi,
Your circuit shows a +10V supply to the 74LS14, check the IC's datasheet,
E.
the 555 requires a trigger pulse that goes below vcc/3. With a 10V supply, the pulse needs to be at least ≈7V p-p. You can't get that with the output of a 74LS14, which is only about 4V p-p. You need to use a CD40106, with the same vcc as the 555.No , Schmitt NOT have additional 7805 drive not shown in the figure.
the 555 requires a trigger pulse that goes below vcc/3. With a 10V supply, the pulse needs to be at least ≈7V p-p. You can't get that with the output of a 74LS14, which is only about 4V p-p. You need to use a CD40106, with the same vcc as the 555.