![]() The positive and negative terminals on the battery are directly connected to the cells inside, and without a bit of voltage monitoring your DIY devices *WILL* deep-discharge the battery! I’ve whipped up a cheap and dirty LM10-based battery monitor for my own projects to circumvent the issue, and if you’re misappropriating tool battery bricks for your projects, do keep in mind that you’ll want to monitor the battery voltage if you don’t want to end up with deep-discharged and dead battery bricks! From what I know, those powertool bricks do NOT have any kind built in deep-discharge protection! Some manufacturers will give you extra terminals on the battery pack to monitor the voltage of the parallel blocks of 18650s and a thermistor output, some will not even do that, but use a proprietary communication protocol to talk with the tool or charger you plug it in. I’ve worked for a while on a project like this for Milwaukee batteries, and also have had a good number of Ryobi bricks to experiment with and disassemble to harvest the cells from. Posted in hardware Tagged battery power, portable power, ryobi, usb charging Post navigation A future improvement to this project could be making the battery interface a separate piece that can be swapped out instead of having to reprint the entire thing. ![]() Which incidentally should make adapting the design to other battery types relatively easy, though editing STLs does pose its own set of unique challenges. But with a pair of calipers and a bit of time in your CAD package of choice, it’s possible to design and build an exact match that works like the real thing. Trying to make an interface for a Ryobi battery, without sacrificing a tool as a donor anyway, would be maddeningly difficult with traditional at-home manufacturing methods. There’s also dual 2.4 USB “A” ports and a Quick Charge 3.0 compatible USB-C port for charging your mobile gadgets.Īs an aside, this project is an excellent example of how powerful 3D printing can be when building your own hardware. From there he’s got a standard “cigarette lighter” automotive power connector which offers compatibility with a wide range of mobile devices such as small inverters or mobile radios. Ryobi standardized on an 18 V battery a while back, so is using a 10 A DC-DC buck converter to step that down to a more generally useful 12 V. With support for multiple charging standards and even an integrated work light, this device would be perfect to have around for power outages or to take with you on a camping trip. Looking to find alternative uses for his growing collection of Ryobi batteries, has come up with a portable power station design that lets him put all that stored energy to use. But if you’re just doing the occasional DIY project, those batteries are probably going to sit unused more often than not. If you’re a professional contractor, having a fleet of batteries you can swap out during the day’s work is a necessity. Prices are the same for you and this blog receives a small commission.Anyone with a few cordless tools has probably amassed quite a collection of batteries for them. OptionsĪn easy (and free) way to support this site is by clicking this link to do your Amazon shopping. Hand-manufactured in Wisconsin, shipping to United States only, via First Class U.S. Quantity is selectable after clicking the BUY NOW button. Make sure to select whether you want just the bare adapter, or the adapter and a bulb. ![]() You also have the option of including a bulb from us in the drop-down menu. The adapter is $10, with you providing your own bulb. This product is NOT designed for incandescent or 120V bulbs.Ī 7 watt LED bulb will run for 10 hours continuously on a 4AH battery. Mail-order bulbs that we have tested and work well include: Bulbs like this are often listed as “Landscape Lighting” or for use in RVs. ![]() The light bulb for use with the Ryobi adapter needs to be a DC bulb, typically rated as 12V, but which can support a higher voltage. Intended use is to make an inexpensive and simple lighting alternative to brand-name commercial products which is appropriate for emergency use, camping, automotive repair, and otherwise making good use of the Ryobi batteries you already have. The Ryobi adapter is 3D Printed of PLA plastic and is designed to mount a low-current, low-voltage LED light bulb to a Ryobi One+ 18V battery. Because there has been such interest in our Ryobi light bulb project, we have decided to sell a test run of them. ![]()
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