PID Fiddler

fid•dle (ˈfɪd l) : to manipulate something; tinker (often fol. by with).

The PID Fiddler is a hand control to tune PID values. This is handy for projects that are not stationary, for example a ballancing robot. It allows tuning of the PID values with only a few wires connected. After tuning, it can be removed.

The PID Fiddler features four pots for adjusting the P, I, D and Sample Time. While the button is depressed, make changes to Kp, Ki, Kd and/or Sample Time. The new values will be displayed on the OLED. When the button is released, the PID Fiddler will send the new values by serial.

The screw terminals are serial connections and ground used to communicate with the controller on your project. The Arduino on your project will require a function to be added to the sketch that will read serial and update the new PID values.

Using the PID Fiddler makes PID value changes fast and easier than reflashing your sketch each time you want to change PID values. The changes are only temporary, so once you find values that you like, your project sketch can be updated with these values. The last values used will remain on the OLED of the PID Fiddler until it is powered off.

The printed parts of this project are the Arduino shield for mounting the components, and the Pot knobs. A link to my instructable project using the PID Fiddler, and the Ball Balancer:
https://www.instructables.com/id/Ball-Balancer-and-PID-Fiddler/

MP3DP

No

No

.2 mm

30%

Print Four (4) knobs for this project.

Parts not printed:

• 4 10 KOhm pots
• 1 Momentary Contact Button: https://www.adafruit.com/product/1010
• 1 Adafruit Monochrome 128x32 I2C OLED Graphic Display: https://www.adafruit.com/product/931
• 1 Arduino Uno
• Misc header pins (.1 in), termal blocks, hook up wire.

Instructions for assembly and use is in the link provided in the Summary above.