If you decide to make your own plotter, be aware that not all old optical drives have stepper motors – HomoFaciens’ hit rate was about 50% when he started pulling them apart. 1GB, 2GB or 4GB LPDDR4-2400 SDRAM (depending on model) 2.4 GHz and 5.0 GHz IEEE 802.11ac wireless, Bluetooth 5.
RASPBERRY PI WIFI POWER PLOTTER INSTALL
Build an install a relay shield on my Arduino, and code it to keep a compass heading (I already have a 3-axis compass breakout). Once installed on the boat, just that will be a nice addition, since I currently use a small PC hooked up to the inverter to power OpenCPN on board.
(No prizes for guessing which is my favourite.) Broadcom BCM2711, Quad core Cortex-A72 (ARM v8) 64-bit SoC 1.5GHz. Installing OpenCPN on a Raspberry Pi device and getting that to run. He’s got some fascinating stuff on there I heartily recommend giving one of his camera-equipped robots a spin via the web interface they’re hooked up to. HomoFaciens’ website is one of those bits of the internet you’ll find yourself wandering around for ages if you’re even slightly interested in this sort of thing. Im a huge fan, and have done a few projects with my Raspberry Pi, from setting up a web server in our workshop, to using it as a desktop PC when my laptop was. As always, he’s also made the whole video and writeup available in German. The Raspberry Pi is a fantastic platform for software experimentation, allowing kids, amateurs and professionals alike to hack away without fear of breaking an expensive computer system. HF has made a full writeup, including all the source code you’ll need, available at his website. He’s recycled old optical drives for their stepper motors, and made a tiny plotter, controlled over WiFi, from those motors, a servo, four H-bridges and a Raspberry Pi. Our old friend HomoFaciens (who has the best voice of any Raspberry Pi user we’ve met) has another fantastic piece of work to share.
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