Hi,
My customer would like to calculate time from power supply turn-on to stable output.
"?" on the attached file is the time.
Can we calculate this?NE555.pdf
Best Regards,
Kuramochi
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Kuramochi-san,
Before power up the timing capacitor is discharged. Therefore at power up the output will go high immediately (within a couple microseconds). The first high output pulse will be 58% longer than the other high pulses after that. The reason is that the capacitor start charging from 0V on the first high pulse and starts at 1/3*VCC for the rest.
Like this
Is the control pin open?