Thermal control unit for electronic cigarettes on Arduino
This device is designed to produce steam with a temperature control of the titanium coil (for nickel or iron, you need to change the RTCHANGE coefficient), which allows you to get a lot (or a lot if the wick brings enough liquid) without overheating with the formation of various bad substances, glycerol decomposition products , propylene glycol and flavorings.
The circuit is designed to work with a battery for RC models, of two Li-cells. I chose a battery of 500 mAh 25C voltage of 7.4V. The current and load capacity can be varied within wide limits, as long as it produces sufficient current with a cold spiral when its resistance is minimal.
Theoretically, it is possible to redo a single-cell battery, but you need to select the appropriate MOSFET keys - with a low switching voltage and resistance in the open state. You can even remove the dividers R1 + R2 and R3 + R4, increasing the measurement accuracy by half (although there will be little real effect).
Resistors R5 and R6 - should be at least 0.25 watts (and better and more). LED output - for a pair of white LEDs so that it can work as an emergency flashlight.
Update: There is no
hardware switch, but the current consumption in sleep mode is about 1.5 milliamps, so you can live on one battery for a week. The "-" button must be set to D2, not pressed too quickly three times to exit sleep mode.
The case was printed on a 3D printer from PLA. The empty space under the atomizer connector is for the battery wires; they are made on model batteries quite long, but I did not want to cut them off.
Relocated sketch for arduino on github
The circuit is designed to work with a battery for RC models, of two Li-cells. I chose a battery of 500 mAh 25C voltage of 7.4V. The current and load capacity can be varied within wide limits, as long as it produces sufficient current with a cold spiral when its resistance is minimal.
Theoretically, it is possible to redo a single-cell battery, but you need to select the appropriate MOSFET keys - with a low switching voltage and resistance in the open state. You can even remove the dividers R1 + R2 and R3 + R4, increasing the measurement accuracy by half (although there will be little real effect).
Resistors R5 and R6 - should be at least 0.25 watts (and better and more). LED output - for a pair of white LEDs so that it can work as an emergency flashlight.
Update: There is no
hardware switch, but the current consumption in sleep mode is about 1.5 milliamps, so you can live on one battery for a week. The "-" button must be set to D2, not pressed too quickly three times to exit sleep mode.
The case was printed on a 3D printer from PLA. The empty space under the atomizer connector is for the battery wires; they are made on model batteries quite long, but I did not want to cut them off.
Relocated sketch for arduino on github