Hello Arthur. I bought 0.33mm nichrome this week, along with a humidity sensor from Jaycar. About $5 / 4 metres, 13.77R / metre. My first dew heater. I will pwm a MOSFET from an Arduino in response to humidity and scale the heating that way. No doubt fine tuning will be required. I'm quite happy with the prototype. It's as warm as holding a mug of hot tea. Quite warm but not so hot you need to let go. Aiming for 18.4R, I finished up with 17.8.
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