How to Control ADC on Raspberry Pi Pico?
- So, what’s the scoop? The main aim here is to get the ADC on the Raspberry Pi Pico under control using MicroPython .
- To do this, we’ll be using a handy little gadget called a potentiometer to tweak and manage the ADC process.
- This session really lays the groundwork for diving deeper into the specifics later on..
How to Set Up Hardware for ADC Control?
- To get started, the first step is to securely pop the module into its designated slot.
- This ensures that everything connects properly and functions as it should.
- Next up, you’ll want to insert the OLED display into its connector; it’s a crucial step for getting that clear and bright visual output you’re after.
- Don’t forget, the ADC needs to be connected to GPIO 26; setting this up is vital for accurate signal conversion.
- Finally, you’ll control the ADC using MicroPython to help you manage the data efficiently..
How to Configure ADC and I2C on Raspberry Pi Pico?
- Alright, let’s kick things off by disconnecting the version root pin from the I2C interface.
- This little hack makes it easier for multiple chips to team up! Now, if you’re wondering what ADC is, it’s the Analog to Digital Converter, and it’s super important because it turns those analog signals into digital ones—yep, that’s how our system can process data.
- Next, it’s time to tinker with the system settings: drop those values from 128 down to 64 and remember to use the I2C address 0x10 for smooth communication.
- Don’t forget to set the ADC channel to ADC0 and connect it to GPIO 26, which is a handy pin for input and output tasks.
- Lastly, for a clear data presentation, convert those numbers to text using the str command and make sure your display settings are right on point..
How to Improve ADC Data on Raspberry Pi Pico?
- Right now, if you’re using a Raspberry Pi Pico, the display is showing the raw ADC values just as they come in.
- But there’s some cool stuff happening behind the scenes! We’re in the process of tweaking the setup so that these raw values transform into a voltage-based display that’s more user-friendly.
- This means you’ll be able to read the data more easily, with voltages rounded to two decimal places.
- The whole setup works at 3.3V, meaning that values approaching zero reflect voltages that are nearly 0V.
- At the moment, you’ll still see the original 16-bit ADC values as well, right next to the new voltage readings.
- It’s a game-changer for interpretation!.
How Does ADC Work with Potentiometers?
- So, here’s what’s interesting: when you slowly turn the potentiometer, the ADC value climbs up gradually, peaking at 653 with a sweet 3.3 volts if you crank it really fast.
- If you leave it in the middle position, the ADC reads 23000 at just 1.18 volts.
- Pretty cool, right? And there’s more! In another scenario, the ADC showed 0.69 volts, giving you a good idea of how well it measures voltage.
- All these examples highlight just how effectively you can manipulate the ADC by tweaking the potentiometer..
What did we learn about ADC control?
- In this session, we dove into how to manage the ADC on the Raspberry Pi Pico using MicroPython.
- It was a great opportunity to pick up some practical tips on handling voltage readings.
- Plus, we wrapped things up with a hint that we’ll be back soon to explore fresh topics.
- So, stay tuned for more learning and discovery on this journey!.