ITPhoenix
Newbie
Hello folks.
The following circuit works perfectly, but sometimes the output will be high on power-up.
The storage cap on the 6VDC supply has a drain resistor that totally discharges the cap within 30 seconds. The problem may appear after hours of power-down/discharge.
A 10nF cap was added from pin 5 to ground to no avail.
The timing capacitor is a 2.2uF electrolytic, which gives the desired delay. It is intended to not only debounce a mechanical momentary switch, but its action is to be perceived as essentially instantaneous.
The load is a photoisolator which uses an internal LED to activate the internal MOSFET switch.
Anyone have an idea?
The following circuit works perfectly, but sometimes the output will be high on power-up.
The storage cap on the 6VDC supply has a drain resistor that totally discharges the cap within 30 seconds. The problem may appear after hours of power-down/discharge.
A 10nF cap was added from pin 5 to ground to no avail.
The timing capacitor is a 2.2uF electrolytic, which gives the desired delay. It is intended to not only debounce a mechanical momentary switch, but its action is to be perceived as essentially instantaneous.
The load is a photoisolator which uses an internal LED to activate the internal MOSFET switch.
Anyone have an idea?