Edge Collective: Off-grid heat

2021-11-22 10:52:14

Terminal type is now 'qt'
gnuplot> set datafile separator ","
gnuplot> plot "output.txt" using 1:2
gnuplot> plot "output.txt" using 0:2


stepping down at 10 min intervals:

next up:


2021-11-22 18:37:23

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:

2021-11-23 08:03:59

Arduino PID https://www.teachmemicro.com/arduino-pid-control-tutorial/

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 ...

2021-11-23 11:01:49

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.

2021-11-23 12:52:43

Next step: add a diode and test ... and add a fuse?

2021-11-23 13:13:26

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

2021-11-29 16:59:02

"Motorcyclists make their own heated clothing ..."



Hook-up wire https://www.mouser.com/c/wire-cable/hook-up-wire/?q=83000


Interesting -- he threads his own nichrome wire into insulation: