With a second person behind a laptop and armed with a chess engine, the opponent’s moves can be fed into the computer and the appropriate response telegraphed through the shoe to the player. The electronics are fitted into a 3D printed case along with a small battery which can then be placed into the sole of a shoe, allowing the wearer to feel the vibrations from a small offset-weight motor. The compact device is small enough to fit in the sole of one of the player’s shoes, and is powered by an ATtiny412 microcontroller paired with a HC-06 Bluetooth module. But and partner were interested in at least providing a proof-of-concept for how this cheating could have been done, though, and came up with this device which signals a chess player through a shoe. We won’t go into any of the details except to say that there is virtually no physical evidence of any method this player allegedly used to cheat in a specific in-person chess match. Be sure to check out our primer on how to deal with lithium batteries before trying one of your own designs, though.Ĭontinue reading “Copy And Paste Lithium Battery Protection” → Posted in Battery Hacks, Parts Tagged charger, dw01a, integrated circuit, lithium, lithium ion, pcb, protection, TP4056Ī few months ago, a scandal erupted in the chess world which led to some pretty wild speculation around a specific chess player. The best thing about this design isn’t the design itself, but that built the circuit schematic specifically to be easily copied into PCB designs for other projects, which means that lithium batteries can more easily be integrated directly into his other builds. It’s also paired with a DW01A chip which protects the cell from various undesirable conditions such as over-current, overcharge, and over-voltage. The circuit is able to charge a cell based on the cell’s current charge state, temperature, and a model of the cell. The circuit is based around the TP4056 integrated circuit, which handles the charging of a single lithium cell - in this design using supplied power from a USB port. If you’re adding one to your own project you’ll have to be extremely careful to treat them exactly how they are designed to be treated using something like this boilerplate battery protection circuit created by. There’s just one major downside: these lithium cells can be extremely finicky. In which case you need more accumulators.Lithium batteries have, nearly single-handedly, ushered in the era of the electric car, as well as battery energy storage of grid power and plenty of other technological advances not possible with older battery chemistries. Then you don't have enough solar in place, and will most likely have blackouts at night, so you need to expand power urgently.Īdditionally, if your ratio is wrong, and you don't have enough accumulators, then you might find you hit 100% accumulator charge at a good spot early in the day, but then run out of power during the night anyway. the accumulators never hit 100% charged). If solar output never drops from 100% before night fall, (i.e.just before night fall, then you really need to expand your power before expanding the factory further. If this is in the middle of the day, then you've still got some headroom to expand the base before needing more power.If this is early in the day, then you've too much solar currently (or you just planned ahead :-) ).when do the accumulators hit 100% charged?). The key thing to look at, is when does the sudden drop from 100% solar panel output happen? (i.e. Then as the sun goes down, solar output drops, and the accumulators take over for the night, discharging. Then you should see a sudden drop from 100% solar panel output (while charging accumulators) to a much lower level (typically 50-75% output), which is what's needed to keep the base going during the day. Once the Sun is fully up, solar should run at 100% for a while till the accumulators are fully charged. What you should see as the sun comes up, solar panel output increases, and the accumulators start being charged. When you view the Power stats, switch to 10 mins view, as this shows a full day and night cycle (slightly longer actually). A quick tip, if using solar and using at least the standard 0.84 ratio.
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