User Manual

Hacks &

Upgrades

Speeding up many requests from Raspberry Pi to CRICKIT

If your project is making a large number of requests from your Raspberry Pi to CRICKIT, the speed of the I2C

connection between boards may be an issue. Fortunately this can be changed.

For the best performance, you'll want to consider tweaking the I2C core to run at 1MHz. By default it may be 100KHz or

400KHz

To do this edit the config with sudo nano /boot/config.txt

and add to the end of the file

dtparam=i2c_baudrate=1000000

Brown Outs?

The power supply on the Crickit will let you draw 4 Amps at once, which is

a lot

. But perhaps you are turning on all the

motors at once, causing the power supply to flicker? An extra large capacitor on the 5V and GND pads may help

smooth out that power draw!

Use a large electrolytic capacitor, rated for 10V or higher. Even though the power supply is 5V, you may think you can

use a 6.3V capacitor, but you want at least 2x the voltage rating if possible so stick to 10V!

https://learn.adafruit.com/adafruit-crickit-creative-robotic-interactive-

construction-kit

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