My contribution to the increasing entropy, and eventual heat death of the universe
I need a replacement for the battery cover on my calipers. It appears to be slightly different from those available on the Mitutoyo site (and the shipping cost is crazy). I modeled it and sent it out to fab in SLA. Will see how it turns out!
A collection of PCBs from these week. Also see Quadcopter 3D files and r2 of the PunkSeq10.
A esp1 to USB interface board:
An experiment in odd shaped PCBs (solar lantern):
Another odd PCB:
And another one, for experimentation:
I picked up a CX10 mini quadcopter on eBay. The CX10 is a tiny, 50mm quadcopter that costs around 10GBP (~15USD). Apparently they work reasonably well (but mine came pre-broken which is always handy).
There’s an interesting teardown over on the EEVBlog forums. The design seems quite nice. It uses an STM32 with a 2.4GHz receiver and 3 axis gyro/accelerometer.
The motors look like standard pager style motors. I believe these are standard brushed DC motors, but it’s possible they are coreless.
Bare PCB CX10 style quadcopter from taobao.
The simplicity of the design got me thinking. It turns out the rotors are available separately (as are the bare boards actually, see left). So I started wondering about how I might go about designing one. As a first step I measured the quadcopter and put the above design for a frame together (design files below). I’ve sent it out to dirtySLA (which cost a massive 4USD! :)) for fabrication.
I’ve revised the PunkSeq10 schematics to fix an error (amazingly I’d managed to leave the 4017s supply unconnected!). This revision also adds switches which allow selection between 4,8 or 10 steps. I’ve tidied up the silk a little, and added some mounting holes.
I’ve ordered a set of these gerbers, and you can order the PCB, a complete set of components and build guide here.
Gerbers: gerbers
My name is Nava Whiteford. I’ve worked for a few sequencing companies. I have equity in a few sequencing companies based on my previous employment (I try to be unbiased in my posts). You can contact me at: [email protected]
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