Unfortunately before demolishing the web-cam I have to use it , minus IR
filter , to make a video for an elctronic engineer friend of mine. He
reckons they would work as a thermal imager and I don't. So will film a
ladder of // 1/3W Rs fed from an increasing voltage, monitored with DVM in
video, up to the point of charring.


I tried ladder of 7 // from 100 to 330R and stepped up from 1V to 10V by
0.5V steps until the 100R started to smell, overheating. Video showed no
observable difference to any of them