Sabitlenmiş Tweet
Bo Redfearn
126 posts
Bo Redfearn
@BoRedfearn
Engineer | AI tinkerer | Sensor whisperer
California, USA Katılım Haziran 2025
893 Takip Edilen102 Takipçiler
@robotsailor I'm curious, how does this do mapping? I don't see any sensors..
English
✨🇨🇳This is a small unmanned vehicle launched by a Chinese company, which can be widely applied in scenarios like urban logistics, park inspection, and intelligent transit.
English
Yes, the stainless steel used in general (like common 304 or 316 in kitchens/appliances) is different from the Cybertruck's. Tesla developed a proprietary ultra-hard 30X cold-rolled alloy called HFS—7x stronger, far more scratch-resistant than typical steels, with bulletproof properties to handguns/shotguns and corrosion resistance matching marine-grade 316L. It's a custom invention for extreme durability.
English
Cybertruck steel is bulletproof to any handgun, shotgun or Tommy Gun
Tesla North America@tesla_na
Tesla Diner was constructed using recycled stainless steel from @Cybertruck production
English
English
Always a great time meeting @Ryan_Resolution & @IsaacSin12,
They're building makermods.ai, a modular robotics ecosystem, currently building Rumi, an $1199 home robot to automate daily chores
Looking forward to accomplishing great things together with the AutoFAB!
San Francisco, CA 🇺🇸 English
Bo Redfearn retweetledi
Today, software is primarily built for people to use (directly or indirectly). But it's very clear that there will be trillions of agents in the future, executing every type of task for us imaginable.
Agents will be deployed for coding, processing loans, reviewing insurance claims, executing financial transactions, acting as personal assistants, and every other known task in the economy. As a result, we're going to see a shift in who we have to increasingly build tools for.
So many new opportunities are rapidly emerging right for building for agents. Agents are going to need seamless identities across platforms. They're going to need file systems and databases to store off their work, sessions, and important data they're sharing. They're going to need tools for collaborating with people. They're going to need safe ways of spending or managing money. They're going to need computers to execute code and other tasks in. And so on.
In many cases, the tools and systems that the human users are already working with will be the natural tools for these agents to leverage. There are many areas where the highways have already been built, and agents will ride right on top of those.
In other cases, there will need to be new capabilities that emerge due to the scale and change in use-case that agents represent. In either case, these tools need to be API-first, as agents will leverage these tools like a developer or machine would have previously. CLIs/APIs are their native tongue.
The complex part is that building for agents introduces new challenges vs. building for people. They require far more oversight than people do, and they don't get the same right to privacy as people. They can't be held responsible for the work that they're doing, but rather the person that launches them into their task must be (for now). They don't quite know when they've run astray and can't execute the task at hand. These are just a small set of things that become the new complexities that need to be anticipated when building for agents.
We’re entering a completing new era of software development and infrastructure that will be built out. Wild times ahead.
English
English
A solo dev just vibe coded what Palantir charges governments millions for.
Claude 4.6 + Gemini 3.1.
The defense tech disruption is going to be something.
Bilawal Sidhu@bilawalsidhu
Between Gemini 3.1 and Claude 4.6 it's honestly wild what you can build. This feels like Google Earth and Palantir had a baby. Made this with all the geospatial bells and whistles -- real time plane & satellite tracking, real traffic cams in Austin, and even got a traffic system working. Panoptic detection on everything. Skinned the whole thing to look like a classified intelligence system. EO, FLIR, CRT. Got a bunch more stuff on the roadmap. This is fun.
English
English
@wildpinesai For the inferences I’m using @AskVenice :)
Yes the IMU alone isn’t enough, I’d need the rotary sensor, but I have none so will go with what I have
English
Building a body for my OpenClaw.
Includes:
- speech to text / text to speech
- autonomous motors control
- object recognition via camera
- IMU for basic orientation
Fun weekend project.
English
@lukas_m_ziegler we’ve already closed the loop! unlocking platform-agnostic, fully autonomous flight
we sell directly to drone contractors, devs, and businesses in the US :)
check it out: thedroneforge.com !
English
Oldie but goldie! 😮💨
Think of a drone that can achieve sub-15 ms latency.
It's like real-time... Imagine the possibitlies.
Once you have that perception, you can close the control loop fast enough for aggressive maneuvers requiring continuous visual feedback.
That's an awesome one @chesterzelaya :)
~~
♻ Join the weekly robotics newsletter, and never miss any news → ziegler.substack.com
English
@DabsMalone Upgrade my bot to run large vision and voice model, etc.
English
English
@gvanrossum Flight code for the rockets and Starlink satellites is written in C and C++.
Python is used where runtime performance is less important than rapid iteration and ease of use.
English
Hey @elonmusk, does SpaceX use Python, and for what? How extensively?
English
Bo Redfearn retweetledi
GOOD NEWS 🚨 TESLA HAS SOLVED THE WIRELESS CHARGING PARADOX WITH UNBALANCED DUTY CYCLES ⚡️
When Elon Musk unveiled the Cybercab without a charge port, the automotive world collectively raised an eyebrow.
The idea was audacious: a vehicle completely reliant on wireless charging, a technology historically plagued by inefficiency and safety concerns.
But with the release of patent US 20250357799 A1 on November 20, 2025, the other shoe has finally dropped. This filing isn't just paperwork; it’s the engineering answer key that explains how Tesla plans to pull off the "no-plug" revolution without frying electronics or wasting massive amounts of energy. We are finally looking at the physics that turns the Robotaxi dream into a viable reality.
⚖️ The problem: The hidden cost of wireless power
To understand why this patent matters, you have to understand the messy reality of wireless power. Sending electricity through the air relies on magnetic fields dancing between a pad on the ground and a pad on the car. Ideally, all that energy goes straight into the battery. In reality, big induction coils act like unintended capacitors, allowing "leakage current" to escape and flow into the car's chassis or the ground equipment.
It is a classic case of electrical waste, but the consequences are worse than just a slightly higher electric bill. This leakage creates electromagnetic noise that can interfere with sensitive electronics and, in high-power scenarios, pose safety risks. The culprit is usually the control strategy; traditional methods try to regulate power by briefly "shorting" the circuit, which inadvertently causes the common mode voltage—the electrical baseline of the system—to spike wildly.
🔗 Tesla's solution: Unbalanced duty cycles
Tesla’s engineers found a way to fix this, and it requires rethinking the rhythm of the charge. Instead of using the industry-standard method that frequently pauses at a "medium" or zero-voltage state to throttle power, Tesla’s new system refuses to sit in the middle. It toggles directly and sharply between a high-voltage state and a low-voltage state.
The genius lies in the timing. The system holds these states for unequal durations—an "unbalanced duty cycle." By keeping the circuit in its dominant state for roughly sixty to eighty percent of the time and the secondary state for the remainder, the system can precisely manage power flow without ever entering that problematic zero-voltage state. It’s like finding a specific drumbeat that cancels out the echoing noise in a room; the power gets through, but the leakage conditions are effectively neutralized.
🧠 Logic: Dynamic and conditional activation
What makes this system feel truly modern is that it isn't a blunt instrument. The patent describes a "switch control circuit" that acts like a smart conductor. It doesn't force this unbalanced rhythm all the time; instead, it watches the charging session like a hawk.
It activates this specific leakage-suppression mode only when necessary—perhaps when the battery voltage hits a certain threshold, the state of charge reaches a specific percentage, or even when the car parks a little crookedly, changing the inductance. The car essentially adapts its electrical heartbeat to the physical reality of the parking job, ensuring peak efficiency when things are perfect and maximizing safety when they aren't.
🛠️ Topologies: Adapting to different circuit architectures
Tesla is ensuring this logic works across its entire potential fleet, regardless of what hardware is under the hood. The patent explicitly maps this solution to the two heavyweights of power electronics: the H-bridge and the stacked half-bridge.
For the standard H-bridge, the system avoids that "zeroing" state that bridges positive and negative cycles. For the beefier stacked half-bridge—the kind needed for very high voltages—it skips the "medium" voltage step that usually sits halfway between the maximum and minimum. By forcing the voltage to swing fully from rail to rail without lingering in the middle, Tesla ensures the physics of the leakage cancellation hold true regardless of the circuit complexity.
⚡ Voltage: Supporting high-power architectures
This is where the patent signals Tesla’s long-term ambitions. The technology is designed to handle a massive voltage range, from one hundred all the way up to one thousand volts. While it mentions standard three-hundred-fifty-volt systems, the explicit support for eight-hundred to one-thousand-volt architectures is a clear nod to the Cybertruck and the Tesla Semi.
This means the "no-plug" future isn't just for small, efficient city cars. This leakage reduction technique is robust enough to handle the massive power throughput required to wirelessly charge a heavy-duty truck or a performance vehicle, future-proofing the infrastructure for the next decade of EV development.
📉 Mechanism: Reducing common mode voltage
If you could see the electrical waves described in the patent, the difference would be startling. In a standard setup, the common mode voltage—the primary driver of that nasty leakage—looks like a storm, fluctuating wildly between positive and negative two hundred volts.
Under Tesla’s new unbalanced scheme, that storm calms into a flat lake. The common mode voltage is effectively flattened, fluctuating only slightly around zero. The simulations are impressive, showing leakage voltage dropping to less than twenty microvolts. That is not just an incremental improvement; it is an orders-of-magnitude reduction that takes wireless charging from "feasible but noisy" to "silent and safe."
🔥 Efficiency: Minimizing switching losses
There is a cherry on top for efficiency nerds: this method actually wastes less heat. Every time a transistor switches states, a tiny bit of energy is lost. By transitioning directly between high and low states without stopping at an intermediate step, the system reduces the total number of switching events.
Fewer switches mean less "deadtime" loss and less heat generation, ensuring more energy actually ends up in the battery pack. Furthermore, because the electrical noise is so thoroughly dampened, the car becomes quieter in the radio frequency spectrum, making it much easier to pass strict regulatory certifications for electromagnetic interference.
🚀 The grand unification for wireless charging: Safety meets Speed
This patent is the shield, but it works in tandem with a previous breakthrough (US20250373083 A1) that acts as the sword. Together, they solve the brutal paradox of wireless engineering: Safety vs. Efficiency.
✅ The "Cruising" Mode ('083): When conditions are safe, the system uses a "partial toggling" technique to cut voltage swings in half. This drastically lowers heat, allowing the Cybercab to charge at blazing speeds (25kW+) without melting its components.
✅ The "Stealth" Mode ('799): When leakage risks rise, this new patent kicks in. It modifies the switching pattern to actively cancel out noise and voltage spikes, prioritizing safety above all else.
By combining these two innovations, Tesla has removed the final human bottleneck. The Cybercab can now refuel itself faster than a human could plug it in, safer than a standard wall outlet, and reliably enough to run 24/7 without a single robotic arm in sight. The plug is officially dead.
Ming@tslaming
GOOD NEWS 🚨 Published on December.4.2025, patent application US20250373083 A1 reveals the critical "secret sauce" behind Tesla's most ambitious gamble: the PORT-LESS CYBERCAB 💥 📜 Originally secured in May 2024, this breakthrough details a high-efficiency wireless charging system capable of handling wide voltage fluctuations, effectively serving as the key enabler for a fully autonomous Robotaxi fleet. By solving the thermal and efficiency challenges that previously plagued wireless power, this technology removes the final barrier to 24/7 autonomy, allowing Cybercabs to refuel themselves without a single human hand or robotic arm ever needing to intervene. ⚡ The "partial toggling" innovation ⚡ At the core of this innovation is a sophisticated method for controlling the power electronics within a wireless charging system—specifically the "H bridge" circuits found in both the ground pad and the vehicle's receiving pad. Traditionally, wireless charging circuits use a method called bipolar switching, where the circuit toggles all switches in a bridge simultaneously to transmit power. While effective, this standard approach is like pushing a pendulum aggressively from one extreme to the other; it creates a massive "voltage swing" across the resonant tank, causing significant electrical stress and energy loss. Tesla's solution introduces a "partial toggling" technique. Instead of switching every component in the circuit, the system's control unit selectively toggles one half of the bridge circuit while keeping the other half in a static state (either open or closed). By repeatedly switching between specific configurations—for example, toggling the left side of the bridge while holding the right side steady—the system works more like pushing a swing and then letting it coast. This changes the voltage transition significantly: instead of jumping from positive (+400V) to negative (-400V), the system transitions from +400V to 0V (a "freewheeling" state). The result is a dramatic reduction in the voltage swing. By toggling to zero rather than to the opposite polarity, the total voltage swing drops from 2v (e.g., 800V) to just 1v (e.g., 400V)—effectively cutting the electrical stress in half. This "softer" transition is crucial because it minimizes "deadtime loss," a common source of inefficiency in power electronics where switches are momentarily turned off to prevent short circuits. This efficiency gain brings wireless charging closer to the performance of wired connections, making it economically viable for mass adoption. 🚗 The "LCC-LCC" architecture: a suspension system for power 🚗 The patent also details the use of an "LCC-LCC" resonant circuit architecture. In simpler wireless systems, the circuit often uses a basic design that is efficient but very sensitive to distance and alignment. The LCC-LCC architecture adds extra inductors and capacitors to both the ground pad and the vehicle pad, creating a double-sided resonant network that acts like a complex filter. This architecture is effectively the "suspension system" for the charging process. Its primary superiority lies in its incredible tolerance for misalignment. In the real world, an autonomous Robotaxi might not park with millimeter-level precision every single time due to wet surfaces or sensor variance. In a standard system, a few inches of misalignment would cause the charging speed to plummet. However, the LCC-LCC topology maintains a constant current flow even if the magnetic coupling between the pads changes. This creates a much wider "sweet spot" for charging, allowing vehicles to park quickly and naturally without performing time-consuming maneuvers to achieve perfect alignment. 🤖 Universal compatibility and the Cybercab 🤖 The flexibility of this system is a major economic enabler for Tesla's Robotaxi fleet. The patent describes a control circuit that monitors real-time factors such as the load on the system and the current voltage of the vehicle's battery pack. By manipulating the duty cycles, the system can handle battery packs ranging from 200 Volts all the way up to 1000 Volts. This means a single, universal ground pad can service a diverse fleet—from a standard 400V Model 3 to an 800V Cybertruck or Cybercab—without requiring expensive, redundant hardware. This directly addresses the Cybercab's most radical design choice: the complete removal of a physical charge port. Skeptics questioned how a fleet vehicle, which needs to charge rapidly and frequently, could manage the thermal stress of wireless power transfer. This patent provides the answer. By utilizing "partial toggling" to drastically cut switching losses and heat generation, Tesla ensures the Cybercab can accept high-power wireless top-ups repeatedly throughout the day without overheating its receiver pad or degrading its battery. Furthermore, this technology solves the issue of hardware longevity. In a standard plug-in Supercharger network, physical connectors are the most frequent point of failure and would require complex robotic arms for a driverless fleet. By enabling highly efficient wireless charging, Tesla eliminates these mechanical failure points entirely. The reduced voltage swing means the internal electronics generate significantly less heat and stress, allowing the ground pads to operate for years with near-zero maintenance—a crucial requirement for a fleet that needs to run 24/7.
English