Hi guys. I’m Binit and I’m new to the forums and EV longboards; however, I’m not new to electronics and longboarding in general. I found this forum a month ago and reading it has become an obsession. Seeing your boards and the cool innovations (Fliess is insane!) convinced me to get started on my own. I just finished making a deck (using the sandwiched plywood technique) and I’m about to paint it. I can post pictures if anyone is interested. Some background: I’m a computer science student who’s currently interning and has way too much time on his hands and also has an affinity for electronics and design. Okay, enough intro.
I’m here to get some feedback on an idea I had for a wrist watch based remote. I’m called the project ‘RevWatch’ because the motion to accelerate is like revving a motorcycle (except the wrong way… you’ll see what I mean). The basic concept is a spring rewinding clip, example, acts as a rotary encoder that is tracked by a microcontroller and converted into an acceleration value that is sent over bluetooth to the HM-10 or whatever bluetooth module is connected to your VESC.
That’s a bit tough to visualize, so here are some renders I whipped up in Blender.
Here’s where I got the inspiration from. Imagine the mechanism is inside my watch.
I’ve gone through a couple of revisions of design so far with varying levels of artistic capability.
And I’ve gotten to the point where I’d like to get some feedback from you guys. But first, some details.
WHY Because I don’t want to be seen riding around with one of theseDIY remotes I’ve seen are definitely slick, I’d like to try something new.
GOALS The goal is to create a watch that can serve as a daily driver watch (meaning it has to have basic features: time/date/alarms/timer/stopwatch and some nice to have features thanks to bluetooth: notifications/calendar events). Daily driver means the watch needs to be reasonable in size (goal is 14mm height by 40mm diameter). However, this watch must also be capable of controlling a EV board through the mechanism I’ve described above and it must do it well.
- Acceleration and braking controlled by watch’s crown on a retractable reel.
- Self-rewinding reel acts as a Dead man’s switch that stops the board when crown slips out of fingers
- OLED screen for riding information (speed, battery voltage of board and watch, distance traveled, board’s current draw and mah remaining)
- Time/date/alarms/timer/stopwatch/notifications/calendar events
- 190 mah lipo should give 3 hrs life (pessimistic estimate) of riding use (tx continuously active)
- 3 programmable switches that are also used for watch’s menu navigation
- Companion mobile app for settings/tuning (probably react native).
- Right/Left hand symmetry (must flip UI in firmware)
- Battery protection (over-discharge/current limiter/etc) and Charging via USB Micro B or Mini (status LEDs)
Alright, so what are your thoughts? Would you use something like this? What glaringly obvious thing have I missed? Is the battery life too short and you’d settle for a larger watch? Or would you carry an battery pack and want an even thinner slicker watch? What features need to be included? Would you buy something like this? Would you want an radio version instead of bluetooth?
Thanks for reading and I hope you think it’s an interesting concept.