Make your own Super Simple Ultrasonic Mist Maker
Why Electrical Engineering Stack Exchange recommends it
Electronics Stack Exchange users link it as the source schematic when asking how a piezo mist maker driver circuit works, and when explaining how the transducer is meant to be driven.
Recommended by 1 people across 1 different months, 2021 to 2022.
What it is
GreatScott! builds a simple ultrasonic mist maker from a 555 timer, a logic-level MOSFET, an inductor and a piezoelectric disc, and explains the parts and the circuit. It is a hands-on DIY electronics project video with a schematic and parts list.
What people said
Recommends ScienceDiscoverer · 2021-10 · Electrical Engineering Stack Exchange · on “Why is my Multivib piezo atomizer/transducer driver not working?”
The problem is ambiguous product description provided by the seller. It lists "input voltage" and "operating voltage", but this value is listed for their own driver circuit that works with this transducer. Why they listed it on the page for buzzer only, I have no idea. Here is good video to better understand how this thing is suppose to work. [this video]
Cites Tony Stewart EE since 1975 · 2021-08 · Electrical Engineering Stack Exchange · on “Mystery short in piezo driver circuit”
You Must show / define the reference design power source, which is critical. It may be 100W or much more. Not 15W. Think of how much power a tweeter would need to do the same to water. Perhaps your support is just too weak and it was performing normal or your layout was far too inductive with long wires. The supply dI/dt is massive and limited by the sum of ESR's across the supply with T=ESR * C initially then it ramps up. Perhaps your driver is too high input capacitance Miller capacitance and the load is feeding back to the gate. The low ESR of some undefined mister has larger capacitance, and this feeds back to the gate and requires tuning. Debug Steps Step 1 is insert a series R <=1 Ohm
Cites ScienceDiscoverer · 2021-10 · Electrical Engineering Stack Exchange · on “Can somebody explain how this piezo-driver circuit works?”
[LINK] The source is this video [this video] . I have countless number of questions about this schematic but there is the most pressing ones: Why L1 is connected to SP1 in such a strange way (right in the middle, and not on the same line with MOSFET's drain? Why there is 100 nF C1 capacitor in there? What is it achieving? Isn't SP1 a capacitor itself (2 thin metal plates sandwiching piezo-ceramic disk? For example, I measured my piezo-transducer (albeit a bit smaller one) and it has capacitance of 3 nF. Why add additional capacitor? To decrese overall capacitance via caps connected in series? Wouldn't it mess up resonance? About resonance, is it even suppose to be resonant circuit here? I underst
Cites firemonkey · 2022-02 · Electrical Engineering Stack Exchange · on “Mist maker using a piezoelectric disk. How does this circuit make oscillations?”
This [this video] video of Great Scott has been referenced many times here. The schematic he uses is this: [LINK] The piezoelectric disk requires high oscillating voltage to work. This combination of L, C, MOSFET and the PWM signal generated by the 555 timer generates an oscillating voltage. I don't understand how it produces the oscillating voltage. I have tried to understand it as an LC tank circuit, but I can't figure it out.