EcoRenovator - View Single Post

fabieville · 12-24-10, 10:47 AM

I did your Guess #1. step
It sounds like your comparator isn't switching. Check Pin 2 (Pot tap line) to make sure
that it's voltage is going up and down when you turn the pot CW & CCW.
If Pin voltage isn't changing, you are using the wrong pin on the pot.
If it is changing, then check the exact voltage change.
It MUST change above and below the reference voltage (6.2v) on pin 3.
If it's not changing above and below 6.2, it's not going to switch the FET.

When i did the above step i got it going all the way up to 6.83V and going all the way down to 6.17V
By the way when you said check pin 2(pot tap line) you mean pin 2 on the ic and then the next tester lead should go to ground comings from the input? because that was how i did it and got the results above.

12-24-10, 10:47 AM	#48
fabieville Helper EcoRenovator Join Date: Dec 2010 Location: Jamaica Posts: 59 Thanks: 0 Thanked 0 Times in 0 Posts	I did your Guess #1. step It sounds like your comparator isn't switching. Check Pin 2 (Pot tap line) to make sure that it's voltage is going up and down when you turn the pot CW & CCW. If Pin voltage isn't changing, you are using the wrong pin on the pot. If it is changing, then check the exact voltage change. It MUST change above and below the reference voltage (6.2v) on pin 3. If it's not changing above and below 6.2, it's not going to switch the FET. When i did the above step i got it going all the way up to 6.83V and going all the way down to 6.17V By the way when you said check pin 2(pot tap line) you mean pin 2 on the ic and then the next tester lead should go to ground comings from the input? because that was how i did it and got the results above. Last edited by fabieville; 12-24-10 at 11:20 AM..