ARDUINO PIEZO ACTUATOR SOFTWARE

More then likely, however the pizo pulses themselves and the duty cycle you need to use, and the distance you need the ultrasonics to carry will set a floor on how little current such a circuit would consume. Now when you make the output pin High the pizo will transmit the pulses, make it low and the pizo will be off. Also you will still need to have a ground wire between this circuit and the arduino ground pin. To do this simple disconnect pin 2 from the 74132 and instead wire it directly to a Arduino output pin.

ARDUINO PIEZO ACTUATOR SOFTWARE

However the circuit seems pretty good and if you don't want to have the software overhead of generating the oscillator frequency, you could just build it as shown and modify it slightly to allow the Arduino to start and stop the pulse generation. Then you can eliminate the +5vdc regulator and it's supporting components and the 74132 chip and it's supporting components.

You also need a common ground wire run from this circuit to a Arduino ground pin. Yes, if you can develop a frequency in your sketch and have it toggle an output pin, then you can wire it to pin 1 of the right hand pot. By using an adjustable pot for the R, the frequency can be varied in the range shown. It's forms a simple R/C relaxation oscillator circuit. It's also assumed the the 12vdc power source negative terminal is connected to the ground connections shown on the drawing.

It's not shown in the drawing, but the 74132 gate chip requires both a ground connection (pin 7) and a +5vdc (pin 14) connection. Since I am planning to use solar power in the future, what is the minimum power I can consume to generate these frequencies? Could this circuit be improved to reduce power consumption?Īny feedback or pointers are well appreciated. Basically, are there overlapping functions that Arduino could take over? Can an arduino uno board generate these frequencies directly? I understand that the 5V will be provided by arduino and I won't need the voltage regulator, but not sure about the current: is arduino enough to drive this? (3) The third thing is that I was wondering if there are components/subsets I can trim out of this circuit since I will be using an arduino board to control it. (2) The second thing is that I don't understand how the frequency is generated using the 74132/capacitor/resitors but I will take that as a homework (hints appreciated) and I will read up on it: possibly with more specific questions here later. (1) The first thing I don't understand is why is there a VCC_5V being regulated but the driving circuit is powered directly by the DC12V instead? Where is this VSS_5V used? I don't fully grasp what goes on when current starts going through this, but I take that it will produce a stable 5V on the other end. Looking at this circuit, I am able to identify the voltage regulator (UA7805) and a few other components that goes along with it: 1x capacitor 330u and 2x 104).

My goal is to use Uno to turn this transducer on/off and vary the frequency between the 130-140 MHz range (this will be usefull mostly when testing/developing). The company that sells this piezo transducer also provides a driving circuit (attached here). This arduino board will also be connected to other stuff (sensor/actuators) later on. I have an ultrasonic piezoeletric transducer that needs to be driven by a frequency between 130KHz and 140KHz and I am planning to control this circuit (turn it on/off, change the frequency within this range) using a uno arduino board.

Arduino piezo actuator