A variable, variable wattage board. Wattage adjustment available depends on the battery spec and the coil resistance. It can run off 2S or 3S. Power is regulated with PWM.
It's mine. I used an atmega328p MCU, PWM is 122.55Hz.
I did have temp control but it needs a minimum of 16 PWM cycles to get all the readings and as the wick dries out it can't put low enough voltage through to stop the coil from overheating .
This is one partially assembled. The screen goes over the top of the MCU. I'm still putting the finishing touches to the firmware.