Terminal type is now 'qt' gnuplot> set datafile separator "," gnuplot> plot "output.txt" using 1:2 gnuplot> plot "output.txt" using 0:2 gnuplot>
stepping down at 10 min intervals:
In v3, tried two heaters in parallel. Got:
Now re-trying one without changing position of temp sensor, for direct comparison ...
Now re-trying with three in parallel ...
Testing linearity by plotting equilibrated temp vs pwm for that temp:
Three paralllel heaters:
Note that as of now (2021-11-23 08:06:17) the battery voltage is approx 12V; early in the experiments it was at 13V.
Now, return to one heater, repeat experiment, see if lower voltage has had an impact ...
Results from one heater experiment. Note that the initial temp was higher, so perhaps easier to reach max temp initially; second run seems to reach lower max temp.
Next step: add a diode and test ... and add a fuse?
Nice guide to using N-channel mosfet w/ motor control ... https://bildr.org/2012/03/rfp30n06le-arduino/
Carbon fiber heating wire: https://www.walmart.com/ip/Anself-3mm-12K-33-Carbon-Fibre-Heating-Wire-200-High-Temperature-Far-Infrared-Silicon-Rubber-Warm-Floor-Heating-Cable/214637878?wmlspartner=wlpa&selectedSellerId=101001360&&adid=22222222227458777995&wl0=&wl1=g&wl2=c&wl3=538566868938&wl4=pla-1461988039397&wl5=9001876&wl6=&wl7=9002004&wl8=&wl9=pla&wl10=128133340&wl11=online&wl12=214637878&veh=sem&gclid=CjwKCAiA4veMBhAMEiwAU4XRr8JrzrRzHUIx8zmXSVjrAAqEOX5sOsjLmlKgGTlOpF0Q_P1oLxs-eRoCHKsQAvD_BwE&gclsrc=aw.ds
"Motorcyclists make their own heated clothing ..."
Interesting -- he threads his own nichrome wire into insulation: