Bantam Tools Blog

Seattle Winter Storm Project

Posted by Goli Mohammadi on Oct 18, 2016 9:48:34 AM

We love hearing about all the neat, diverse projects our community members make with the Othermill. Some of the best ones are built to solve a problem, and we recently got the following note from Maria Eberhardt when the Pacific Northwest was facing some serious storms last week. She made a multi-voltage LED light in case they lost power.

I live in the Pacific Northwest (Seattle, WA) and we just went through a typhoon/major storm. We experienced a power outage on Thursday for a couple of hours, and we were expecting something more serious on the weekend.

Saturday morning I thought it would be good idea to have a multi-voltage LED light. I wanted something that could run off a 3.6-volt LiPo, a 5-volt power bank (or some other means of 5 volts), and a standard 9-volt battery. Within an hour, I had a simple PCB board design in EAGLE, and within another hour or so, using my Othermill Pro, I had a working prototype. I ended up making three multi-voltage LED lights just in case.

Here's my second version:

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The first version didn't have the right USB footprint. Luckily, I didn't have to wait three weeks shipping my board design out to fix my mistake.

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The above image shows the LED and 0603 resistors fitted, with the USB connector waiting to be hand-soldered. The three resistors are probably overkill for the low power dissipation. There's a four-pin header for +9, +3.6, +5, and GND. There's also a two-pin header for a JST header to connect LiPo batteries directly (but was not populated at the time).

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My multi-voltage LED light hooked up to a 9-volt battery via a four-pin header. Here's the light hooked up to the USB.

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It was a fun and useful project! Thanks to the Othermill Pro I was able to build this light within a couple of hours instead of waiting weeks.

Thanks for sharing your build with us, Maria! Do you have a neat project you made with the Othermill Pro? We'd love to hear about it. Drop us a line at support@othermachine.co