X xeiro New Member Feb 26, 2011 #1 can anyone tell me what is the problem with this circuit. i have connected all the components as given but i am unable to switch off the alarm even when light falls on the photodiode.....plz help anyone.. Attachments Untitled.jpg 25.8 KB · Views: 271
can anyone tell me what is the problem with this circuit. i have connected all the components as given but i am unable to switch off the alarm even when light falls on the photodiode.....plz help anyone..
J Jaguarjoe Member Feb 26, 2011 #2 The output will remain high when the (+) input is greater than the (-) input. The 33k hysteresis resistor seems kind of small. Try 10 times that.
The output will remain high when the (+) input is greater than the (-) input. The 33k hysteresis resistor seems kind of small. Try 10 times that.