I2C – Ryan Bloomgren

[Mini-Server] Server Circuitry

I secured the LCD in place with screws and made a 3.3v to 5v 2N3904 level shifter for the I2C communications between the screen and the pi. The switch is wired and works as an interrupt in the python code. I also used one of the pi’s pwm outputs to pulse the button LED, so there is a “breathing” effect when there is a notification.

I need to cleanup the code and add a menu system so I can control a few programs. I also need to clean up that circuitry!

[Mini-Server] Case mods

The case has a small fan that can be controlled with pwm, and a LED/pushbutton. No screen!

I had a $3 Chinese I2C 16×2 LCD display laying around. So, I got to work with the dremel and file and now the case has a LCD.

I need to have the faceplate machined and refinished. I modeled the cutout in Solidworks and sent it out to be cut. Luckily, I know someone who can do it for free.