KerimF
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Kermin,Hi,
Perhaps this may help.
Kerim
Kerim
Should i use all diodes on the output and one resistor
or use 4 doides and one resistor as to what Len suggested. There is no significant difference except that you save a diode. As Kerim wrote, the resistor will increase the gate voltage by about 0.6 Volt compared to the diodes. This will simply turn the FET on harder.
It should be 9Hours ON 15Hours OFF. Turning on 8:30AM thur 5:30PM. Then OFF 5:30PM thur 8:30AM.
You have it 15Hours ON 9Hours OFF.Or did you write it backwards.
Can you please! Explain to me. How your circuit is to function.
Thanks
---------- Post added at 13:47 ---------- Previous post was at 13:45 ----------
Len
This is what i think? How this timer circiut is functioning. But? I still may, not be right.
The crystal resonates at 32.768khz. It (meaning the Q19 output of U1) pluses 8secs on 8sec off. For a period wavefrom of 16sec total. (what you mean is:- the period of the waveform is 16 Sec)
With an output FQ of 0.00625Hz. (1/16 = 0.0625 Hz) So. U1 is the timing clock for the circuit. The crystal driven by the oscillator section of U1 is the timing clock. Each stage of the counter in U1 divides the frequency by 2 so at Q19 the frequency is 32 768/2^19 = 0.0625 Hz thus T - 16 sec.
If you take 524288 & divide it by 32768 = 16secs period.
What I don't understand? How long dose (you mean "does") it take to flip high at the 524288bit Q19 .Or is it already set to pluse at 8s on 8s off.
with an output FQ of 0.00625. See below.
Dose the 4520 IC counter count to 255 and reset every hour for 9Hour (on) then resets its self. Then gos off for 15Hours or do
you need to reset it for 15Hours.If this is correct! I need the circuit to reset it's self each hour,day,week and repeat it each week.
With out me pushing the reset button all the time. Is this going to work the way i stated in Post #1. Just wondering about this.
Please repond.
Thanks.
No! Look at the waveform diagram in my previous post.So. If i were to put an LED on Q19 it will take about (4 hours) for 262144 pulses high and another (4 hours) for 262144 low before the LED gos high and turns on at 524288bit. Is this right!
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