Hello all,
I am wanting to build a copy of a dehydrator that an instructor at the local Vo-Tech uses. It is nothing more than an old fridge or freezer that is powered by a 150 watt light bulb. Very simple heh? It makes wonderful beef jerky. His set up was big enough to do 3 or 4 lbs at a time in 8.5 to 9 hours.
To my question. I am very new at electronics design and construction, however, I have a simple design for the temperature control circuit that I would like you all to critiqe.
12vdc_________________ | | 100ohm / |_________________| npn trans. | | 1K Thermistor \\>________________dc controled 120vac relay | GroundI hope this is inteligible. I drew a schematic, but I can't post it here. I can post it on the internet if you can't decifer this.
I would like to know if this circuit is a legitimate idea? Can it be made simpler? Do you think I will have trouble with the transistor only partially coming on, making the relay chatter, oscillate, or what ever the proper term is?
Thanks for the advice,
Ned