If I understand correctly, the voltage is not created at the tip but along the temperature differences on the wires. It is not the junction but the difference in the voltages created along the wires. This has an impact on connection wires and the connection block.
I was hoping that I could light an LED headlamp on my 7 1/4” steam locomotive using thermocouples placed in the smoke box, inside the tall stack and firebox, but I suspect this method would not give me a high enough voltage. Do tell me if I’m wrong. (I like the idea of generating light from waste heat.). It is quite a big model of a 610mm gauge prototype similar to an O&K 40hp loco. I think a turbo generator would use a lot of steam and be very inefficient. Any thoughts welcome.
simplest approach would be battery power. You could make it permanent by added a power takeoff from an axel to drive a dc motor to generate charging power, but the easiest would be just swapping batteries now and then.
Good idea -- Gain choice will really depend on temperature range you want to measure. Or try one of the Maxim chips with built in cold junction compensation.
If I understand correctly, the voltage is not created at the tip but along the temperature differences on the wires. It is not the junction but the difference in the voltages created along the wires. This has an impact on connection wires and the connection block.
Very informative and nice presentation
What is the type of current induced in the thermocouple? Is it AC or DC?
Dc
very informative .Thanks for making this video.
I was hoping that I could light an LED headlamp on my 7 1/4” steam locomotive using thermocouples placed in the smoke box, inside the tall stack and firebox, but I suspect this method would not give me a high enough voltage. Do tell me if I’m wrong. (I like the idea of generating light from waste heat.). It is quite a big model of a 610mm gauge prototype similar to an O&K 40hp loco. I think a turbo generator would use a lot of steam and be very inefficient. Any thoughts welcome.
simplest approach would be battery power. You could make it permanent by added a power takeoff from an axel to drive a dc motor to generate charging power, but the easiest would be just swapping batteries now and then.
@@RickSellens Agreed…. It’s just that steam locos produce enormous amounts of waste heat which would be nice to make some use of
What materials is this thermocouple made of? Could you recommend any good papers on thermocouple construction and voltage potential?
What is formula??? Measure temperature
use a 100x diff amp
Good idea -- Gain choice will really depend on temperature range you want to measure. Or try one of the Maxim chips with built in cold junction compensation.
yes, those are easy choices if already available near hand.
how many of you are there? Why does it sound like that are multiple people saying the same thing. ECHO
No echo here, I think the problem is on your end