Hi everyone, for about a year I have become interested in electronics more than usual. I take things apart and try to understand how things work. Couple of days ago I took a heating pad apart and tried to understand how it ticks, to my surprise some of the voltmeter measurements did not make any sense.
The input voltage to the pad is 120VAC, the output to the pad is 170VAC. What is confusing is that when I change the temperature of the pad the output voltage stays at 170VAC. My question is how is it possible that the pad changes temperature without voltage change?
I took a picture of the board, let me know if you need me to measure anything else. Thank you in advance.
The input voltage to the pad is 120VAC, the output to the pad is 170VAC. What is confusing is that when I change the temperature of the pad the output voltage stays at 170VAC. My question is how is it possible that the pad changes temperature without voltage change?
I took a picture of the board, let me know if you need me to measure anything else. Thank you in advance.