Sunday, January 23, 2022

Rooting the Creality Halot One resin 3D printer

I have finally decided to enter the 3D printing bandwagon. Having room for more hardware have always been the main inhibiting factor for not having done it longer ago. But with a little tidying up of the available space the impossible eventually became a reality. At least that was my reasoning, and the selection of a small resin printer seemed like an interesting choice in that respect, at least in what concerns the space occupied by the device itself.

Sunday, December 26, 2021

Making a deafening piezo buzzer is harder than it seems

Since I was a kid, when dissecting toys, I would find these disc shaped components called piezo transducers or speakers, which were responsible for producing the beeps, melodies and what not, emitted by the toys.

I would often play with these, and try to connect to DC supplies or audio outputs from other devices, but was always frustrated with the sound never being nearly as loud as that produced in the original device.

Tuesday, December 14, 2021

Reverse engineering the Laotie Ti30 scooter LCD display - part 3 - Encryption Broken!



In the previous post I had the chance of discovering and documenting most of what there is to learn about the communication between the LCD unit and the master ESC (speed controller) that drives the e-Scooter rear motor.