Anthrophex – Update 3/5/17

(Its now 4/5/17 shhhh) Frame So last night I was in the hackspace testing out my new hinges and moved actuator. Sadly, the hinges once again were too weak to fully support my weight (ugh) so it’s made me rethink the design of each leg. I am however going to keep the hinges for now […]

Anthrophex – Controller board 2

After the faults with controller board 1, I wanted to respin another controller board ASAP. These boards arrived yesterday and with a swift order from RS, so did a load of components! On the previous board, I was using a large STM32 device with many pins and driving the motors directly through level shifter chips. […]

Anthrophex – Linear actuator feedback

Obviously having feedback for each of the linear actuators is a pretty big requirement (though not essential realistically for the leg lifting actuators), therefore a fair bit of through needs to go into this section. I was originally going to use flex sensors on the joints to measure the angle of each joint but after […]

Anthrophex: Part 2 – The build

I guess now would be a good time to disclaim my machining abilities. I can safely say that I’d make a shocking machinist but I guess its the effort that counts right? Regardless, with the arrival of parts, the build could begin! The leg and hip hinges As all of the aluminium was pre cut […]

Anthrophex: Part 1 – The design

Half man, half (ant, beetle, grasshopper, cockroach…), the ultimate dream of creepy sci-fi locomotion. I’m sat here with a 6 legged centaur like image in my head, somewhat like the Scorpion King from The Mummy (exceptional 1999 CGI). Probably about the strangest intro to a post I’ve ever written but hey! It’ll do. This is […]

Simple Sawtooth VCO

So I’m looking to do some analogue synthesizer design and one of the coolest sounding basic waveforms for a synthesizer (imo, of course) is the sawtooth wave. The sawtooth wave is pretty much described by its name – a wave that increases linearly then drops off as fast as possible, as if to imitate the […]

STM32F0 CubeMX Tutorial 1 – GPIO

It’s certainly been a while since I wrote a tutorial, a lot of the STM32 ecosystem has changed and its probably time I changed with it. CubeMX was developed by ST to streamline application design and creation. It allows for a visual method of generating initialization code without needing to know the ins and outs […]

STM32F0 Bipolar Stepper Motor Driver

So I’ve been looking quite a lot into minimum cost robotics as of late and have been searching for the best drive methods. I’ve been looking for a slow high torque motor and the standard for that generally lies with stepper motors. Having searched around on eBay and Aliexpress for the cheapest stepper motors, I […]