Hackpadv2

theseagulldevs-ultimate-hackpad

A cool 3x3 macropad I made with an OLED and encoder. I'm going to try to use it as a controller for QLAB and maybe also as a general purpose macropad

Features

• Currently being used as QLAB controller, a software that controlls SFX for live theatre
• Has buttons for GO, Panic, Pause, Resume, Audition, Next/Last Cue, and Open/Close group cues
• Encoder is bound to volume and can be pressed to mute

Assembled Hackpad

Schematic

PCB

Case

BOM

• 1x PCB
• 1x Seeed XIAO RP2040 Microcontroller
• 9x Cherry MX Switches
• 9x Through-hole 1N4148 Diodes
• 1x EC11 Encoder with switch
• 1x 0.91 in OLED display
• 9x DSA keycaps
• 1x 3D printed case (To be printed myself)
• Mounting hardware

Finished hackpad!

Video (audio ON) https://github.com/user-attachments/assets/ad0931c5-6766-4630-a042-3e10abe5cee0

Assembling it

Building it was definitely a bit of a challenge, as it was my first time soldering and I didn't really know what I was doing. I was ultimately able to get it to work, although I soldered a diode on backwards and I didn't really have any proper equipment to remove the old solder so one diode looks a bit cursed. Other than that my firmware mostly worked with pretty minimal debugging, the only thing that I haven't been able to get working is the encoder button, I think it's because of how I wired it in my schematic. Other than that the only other thing I would've done differently is not put the USB port at the bottom because it's kinda awkward. I learned so much designing and building it and I'm super happy with how it turned out!