Doing my vacation in the summer of 2019, I had some spare time for improving upon my previous nRF24 skateboard remote design. For quite some time I had been thinking about redoing the remote, as to improve the overall performance and design. Thus, I started from scratch, with a few goals in mind:
- Improve the grip of the remote
- Get a better view of the screen
- Smaller, yet at least double the battery capacity
After a few initial sketches, some hardware investigation and some 3D-printed prototypes, I came up with the following design:
The design simplifies the entire assembly process of the remote, as now all electronics are assembled on a single PCB, with the exception of the screen. The remote uses a 14500 battery with a capacity of 700 mAh (double of the old remote).
To keep things simple and compatible with the old remote, I used an ATmega328 for the brain and an nRF24 module for doing the wireless communication. By doing this I could reuse my old software, keeping this project purely hardware-based. I designed a PCB, ordered a few, and made a prototype:
The prototype worked, however, because of the limitations of the nRF24 (and ATmega328) I chose to stop the development of this version, as I wanted a more powerful remote with more features. To achieve this I have been developing a newer version using the nRF52840 chip, a powerful ARM processor with built-in wireless communication and Bluetooth support.