Hi everyone!
I recently purchased an Arduino mini pro 3.3 V for my university project which is sending the voltage signal of a piezoelectric sensor wirelessly to a computer. I use the Arduino mini pro 3.3 V because I look for low consumption circuit whose power supply comes from an energy harvester. I looked for a setup for a 3.3 V RF transmitter but I found nothing other than an RF transmitter with a 5 V power supply. I was wondering if you can send me an option with a tutorial on how to set up a wireless transmitter when the circuit is supplied with 3.3 V.
what sort of wireless transmitter? WiFi, Lora, XBee, Bluetooth, BLE?? what frequency?
what are you communicating with?
what peripherals are attached to the Arduino mini pro?
if WiFi have a look at D1 Mini Pro - what do you then need the Arduino Mini pro for?
Bluetooth radios are all 3.3V, but most modules have a voltage regulator that allows them to be powered by 5V as well.
That would work, if your energy harvester circuit can supply the needed current for the required time. Post the details of your project and forum members can advise.
@jremington@horace Thank you for your responses. Here is the setup from a research paper that comparatively we are doing the same thing:
The energy harvester is from piezoelectric transducers that give a 3.3 V DC voltage from the LTC3588. I want to use this power supply for Arduino pro mini 3.3 V. Also, I have a piezoelectric sensor that is being used for vibration monitoring and I will connect it to the Arduino. The frequency range I want to measure with the sensor is preferably 0-0.5 kHz. For the receiver, I use the laptop and the receiver circuit to record my piezoelectric sensor output. How feasible this idea is I don't know yet.
@jremington That's one my questions too. I have checked several papers and resources and mostly the PZT was connected to the LTC directly because it already includes rectifiers, if I am right. But this part is something we figure out the output power supply in the tests under different conditions.
The LTC3588 in this setup has a 5 V DC output. I decided to change this setup to a 3.3 V DC output and that's why I am looking for a 3.3 V RF transmitter. So my microcontroller is Arduino pro mini 3.3 V but I don't know about the RF transmitter if there is something that works with 3.3 V.
the D1 mini pro is a 3.3V device- runs using the ESP8266 microcontroller and has WiFi built in
you could possibly connect the a piezoelectric sensor directly to it
