Atomizer Coil Temperature Controller Circuit

An atomizer is actually a small battery managed heating unit created for heating a given liquid until it vaporizes and goes out into the atmosphere from the given nozzle of the atomizer device. The liquid “juice” loaded inside the atomizer may well be a fragrance based fluid, a repellent liquid or any other identical liquid which could require vaporization for a chosen function, based upon the specific consumer.

For heating the chemical to some vaporizing degree, the atomizer utilizes a wire coil filament, whenever this coil is switched with battery pack across its terminals, it becomes hot because of the presented resistance to the battery current, and in the procedure vaporizes the fluid juice stuffed over this coil.

Normally, atomizers are available in two variations, one is the low resistance (LR) variety while the other high resistance (HR) kind. The low resistance model has the ability of implementing more battery current and therefore produce more heat and fast vaporization, although the HR as well as high resistance atomizers do the same but with a reduced amount of temperature and vaporization rate, because of the fairly greater coil resistance, and reduced current usage.

Having said that there’s no intermediate setting for these models that might enable the individual to set a desired vaporization rate from the liquid juice, as might be chosen by a person utilizing the product.

The suggested concept of a PWM controller circuit could be efficiently utilized to match the above necessity wherein the consumer could control the atomizer coil warmth and also the vaporization point when needed, and as per specific standards.


The figure above displays a simple atomizer PWM heat controller circuit utilizing only a couple of transistors along with a solitary mosfet. The mosfet could possibly be replaced with a BJT in the event the functioning voltage is under 6V.

The circuit is a fundamental transistorized astable multivibrator circuit, the adjustable resistor VR1 determines the PWM rate for the two channel of the astable.

The LED offers an reverse indication for the PWM rates utilized on the gate of the mosfet. Better lights signifies a narrower PWMs on the mosfet gate and for that reason lessen temperature within the coil, on the other hand a dimming LED signifies a broader PWMs on the mosfet gate and thereby higher warmth on the linked filament coil.

Parts List

R1, R2 = 1K
R2, R3 = 10K
VR1 = 100K
C1, C2 = 2.2uF/16V
T1, T2 = BC547
Mosfet = IRF540 or any other mosfet equipped to handle above 10V/50amp drain to source parameters.