Questions tagged [piezo]
Piezoelectricity is the electric charge that accumulates in certain solid materials (such as crystals, certain ceramics, and biological matter such as bone, DNA and various proteins) in response to applied mechanical stress.
310 questions
5 votes
5 answers
1k views
How is the 4.5V delivered in this charge amplifier circuit?
So I have found this circuit from this website: https://sound-au.com/project202.htm As you can see in the picture there is the 9V battery powering the omp amps, but for the +4.5V, how is that ...
- 53
0 votes
1 answer
122 views
What's the part number or package name of this ultrasound transducer?
I have an ultrasound transducer that seems deteriorated and should be replaced. It is part of a TDK NB-80E-01-H unit for mist generation. The actual transducer has a soldered-on cable with a connector....
- 25.5k
-1 votes
1 answer
94 views
Guitar piezo pickup to headphone needs?
I have a piezo-electric guitar pickup that has bare wire coming off of it. I have a pair of headphones with a 3.5mm jack. I know that the pickup is going to produce a signal that isn't at the right ...
- 99
3 votes
1 answer
119 views
108kHz Piezo oscillator for water diffuser using IR21531SPBF
I wanted to design a circuit to put a 108 kHz piezo oscillator into resonance (12V and 500mA-Max). I designed the circuit as follows. I did not place the bootstrapping diode D1, as it's not needed per ...
- 85
4 votes
2 answers
393 views
Piezo buzzer drivers with different sound pressure
I usually drive a piezo buzzer with the common driving circuit: a MOS (or NPN) and a resistor across the buzzer (between VCC and drain). The gate is driven by a MCU with a square wave. The pressure ...
- 171
0 votes
0 answers
88 views
preamplifier circuit for a piezo contact mic?
I'm working on a project where I'm using a piezoelectric sensor to capture vibrations from a solid surface (like a contact mic). The signal I get is very weak and noisy when connected directly to an ...
2 votes
1 answer
427 views
Train lighting - LED powered by vibration transducer [closed]
I need to put lighting down the side of moving rolling stock, along the lines of lighting found on planes and road trains. But the solution can’t use traditional power sources or solar as the wagons / ...
- 21
0 votes
1 answer
128 views
Can't seem to find this 3-pin auto-transformer/inductor anywhere
I am trying to replicate this mist generator circuit, and I have searched for hours trying to find this 3-pin inductor-looking SMD part, but it seems impossible to find. Does anyone have any idea what ...
- 173
0 votes
1 answer
103 views
Need Help with a Ball Bounce Detection Circuit - Arduino
I am trying to use a piezoelectric sensor to detect vibrations on nearby bounces of a ball on my desk but I am having trouble getting the results I want. I am new to Arduino so it may be something ...
- 11
3 votes
1 answer
192 views
Connecting piezoelectric actuators
I have a high voltage driver IC kit. While searching for high voltage piezo electric actuators (between 100V-220V), I saw many of them are expensive. Above 10USD. To avoid that thing, I had an idea ...
- 1,821
3 votes
1 answer
318 views
Is a piezo better driven with a square or sine wave?
The following circuit was taken from the following source: TI Source I would like to understand whether it is better to apply a 4000Hz square wave or a 4000Hz sine wave to this buzzer. In addition, ...
- 2,980
0 votes
1 answer
118 views
Driving Piezo Using Unfiltered Sine Wave PWM
Can piezoelectric components like Langevin transducers be driven using unfiltered near sine wave PWM? If so, what are the upsides / downsides? Where can I learn more? As an example, I'm attaching ~...
- 267
0 votes
1 answer
178 views
How do those 2 transformers work together to drive ultrasonic cleaner's piezo?
For a couple days I try to understand how the following ultrasonic driver circuit works. Possibly it drives a 40 kHz piezo. I reverse engineered and drew the circuit. There are lots of things that I ...
- 155
0 votes
1 answer
91 views
How to drive single or multiple pvdf film type piezo actuators
this is going to be a little long but I wanted to include as much detail as possible in my question. There is a TLDR at the end. I am part of a design team focused on making a vibration and audio ...
1 vote
3 answers
149 views
Audio Preamp Design Feedback
I designed this simple pre-amp circuit for a piezo electric pickup. I spun a PCB and built 2 boards up. It works, but I wanted to get some feedback on the design. Are there any apparent issues with ...
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