![]() I cut a couple of pieces to length and bent them at a 90 degree angle. I find these things useful for lots of things, and always have some on hand. It is basically looks like spare parts for erector sets. You can find this stuff at places like Lowes in the specialty hardware The technical name for them is Mending Plates. I used a couple pieces of pre-drilled strut. Here is what I came up with for contacts. Now I just needed to add some electrical contacts to tap into all the lovely Watt-Hours hiding within the battery. There is a skinny alignment tab on the battery post that I had to cut a matching notch for by hand with my jig saw since it was narrowerĪnd here is the proof of the pudding. Here is a view of the Mach3 cutting screen on my laptop as the CNC Router cut out the adapter plate.Īnd here is the finished adapter plate, hot off the CNC Router. That was only because I made a bonehead mistake in the g-code the first time. It only took me two tries to get a perfect fit for the battery. I measured up the shape and dimensions of a Ryobi battery post, figured up how much internal volume I'd need for the rest of the parts, and cut outĪn adapter plate from a piece of 3/4 inch thick birch plywood. This looked like a perfect project for it. In fact, I am always looking for an excuse to cut I have a home-made CNC router, and I'm not afraid to use it. Instead of 3-D printing the adapter, I decided to use good, old subtractive manufacturing to make mine. So I decided to try making my own adapter. I didn't want to buy a different battery type and charger. I couldn't find anything that looked like it would work for my application. I Googled around, looking for someone selling 3-D printed connectors for the type of Ryobi Lithium-ion batteries all my hand tools use, Ryobi power converter how to#So I immediately started scheming how to make something similar for myself. So there was no issue with cables winding and tangling as the scope rotated. Plus the battery was small and light enough to mount on the scope itself. He used the smallīattery to power all the systems on his scope. He had bought a 3-D printed connector for a certain brand of 12 There had to be a better way.īack in January, before the pandemic, at a gathering of fellow amateur astronomers, a friend of mine showed off his new battery system. This is no easy task since the cords are all but To try to stay conscious of how far I had rotated the scope so I could periodically unwind it before something snagged and either unplugged or got damaged from the strain. Secondly, the cords would get wound up as I moved the telescope from object to object. it has enough oomph to run the telescope for several nights on a single charge. Lighter style power sockets on the case to plug power cords for telescope accessories into. It is about the size and weight of a car battery. I had been powering my big Dobsonian telescope with a big, deep-cycle, lead-acid battery. Or maybe I should say not having to lug it around any more. Lugging around this big, heavy, lump of a battery was the main inspiration for this project. UPDATE: This project was recently featured on the HACKADAY tech blog. There isn't any reason something similar couldn'tīe built using batteries from another company.Ĭlick on any photo for a larger and more detailed image. I chose Ryobe batteries because I have a ton of Ryobi hand tools, and a bunch of batteries and several chargers for them. Below I talk about the inspiration for this project,Īnd each step in the construction. On this web page I show how I built this 12 Volt power supply that is powered by Ryobi hand tool, lithium-ion batteries. How I Built A Ryobi Battery Based 12 Volt Power Supply How I Built a Ryobi Battery Based 12 Volt Power Supply ![]()
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