Hi Guys,
I need some expert advice.
I built this Differential Controller using a LM393 comparator. It appears to be working except that when the temperatures from the thermistors are equal/similar, the relay chatters and the LED flashes. What is missing?
I am thinking that it may need a resisitor between the output and the non-inverting input (positive feedback) - but this will create hysteresis, or a resisitor between the output and the inverting input (negative feedback).
What are your suggestions? And what size resistor would you think would be suitable and where?
Thanks in advance.
I need some expert advice.
I built this Differential Controller using a LM393 comparator. It appears to be working except that when the temperatures from the thermistors are equal/similar, the relay chatters and the LED flashes. What is missing?
I am thinking that it may need a resisitor between the output and the non-inverting input (positive feedback) - but this will create hysteresis, or a resisitor between the output and the inverting input (negative feedback).
What are your suggestions? And what size resistor would you think would be suitable and where?
Thanks in advance.