Qyverra FC v3
A 40 x 40 mm ESP32-S3 flight controller for small brushed quads. Flash it over USB-C with no programmer, fly it from a browser with no ground station app, and read every line of what it is doing.
- Processor
- ESP32-S3
- IMU
- MPU-6050
- Motor outputs
- 4x brushed
- Size
- 40 x 40 mm
Dispatched within 2 working days · replaced free for six months if it was faulty
Is this for you?
Worth two minutes now rather than a disappointment later. If the right hand column describes what you are building, do not order one.
Yes, if
- You are building a small brushed quad, roughly 65 to 90 mm
- You want to poke at an ESP32-S3 rather than a flight controller you cannot open
- You want hardware you can actually read: schematic, BOM and firmware all public
- You are alright soldering motor leads and flashing a board over USB
- You are happy learning in angle or rate mode, hand flown, line of sight
No, if
- You are building anything brushless. There are no ESC outputs on this board at all
- You want Betaflight, INAV or any existing firmware. This runs its own, and porting is not a small job
- You are building a 5 inch FPV quad. Wrong class of aircraft entirely
- You need altitude hold or position hold. No barometer and no GPS, so it cannot do either
- You want something that flies out of the box. This is a bare board and a manual
Still not sure? Ask in the community group before you spend anything. Nobody there is on commission, and being told you do not need one is a perfectly good outcome.
In 2024 I started a WhatsApp group because I had nobody to ask. Somewhere past the first few hundred members, one question kept coming back that none of us could answer.
It was always some version of: why did my board just do that. Not a wiring mistake, not a setting anyone had missed. The flight controller itself, behaving in a way nobody could explain, because nobody outside the factory had ever seen inside it.
So we drew our own. Three revisions and a lot of arguing in the group later, it flies. Then we put every file of it on GitHub, because a board the community cannot read would have been the same problem in a new box.
Take it. It is yours.
Nothing is behind a signup. Clone it, fork it, spin your own boards, teach a workshop with it. MIT firmware, CERN-OHL-P hardware.
Ask us first.
Not sure it fits your build? Post the question in the group. Nobody here is on commission, so you will get a straight answer, including that you do not need one.