Want to up your robotics game and give it the ability to detect objects? Maybe implement a security camera that can see and identify certain items? Now that the Raspberry Pi is fast enough to do machine learning, adding these features is fairly straightforward.
This guide will show you the steps to get TensorFlow 2 installed on your Raspberry Pi 4 and perform some object detection using the TensorFlow Lite Python Interpreter, which is faster than the full TensorFlow interpreter.
There are two main setup paths to choose from. The first option is with a PiTFT if you want to have a larger display. The second option is with the BrainCraft HAT, which has a built-in display and audio along several other components such as DotStar LEDs, a Joystick, and ports.
Seeing that some email newsletters are providing numbers as to their subscription and effectiveness rates, Adafruit presents the same for the Python on Microcontrollers newsletter, delivered every Monday via email.
Growth slowed in the fourth quarter although after the holidays it has had a healthy uptick.
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Willem van der Jagt was watching Dave Plummer’s video in which he made a clock in 6502 assembly for his Commodore PET. Having an Apple II clone, he wanted the same for his computer. However, Dave has a real-time clock in his Commodore, but Willem doesn’t have one in the Apple.
I started thinking about how I could do a similar clock for my Apple 2 without such a card. I didn’t really care about it keeping time with the computer turned off because I won’t rely on this to know what time it is. I mostly just want to see it work.
While looking for ideas, I realized the solution was right in front of me: the pendulum clock that belonged to my grandparents, hanging on the wall right behind my Apple.
Willem discovered an inductive proximity sensor to use to detect the swings of the pendulum. Then some hardware to count the sensor pulses inside the computer using an interrupt. Finally code to display the time on the CRT.
Conservative former federal judge J. Michael Luttig joins those arguing the Supreme Court should find Donald Trump is disqualified under the 14th Amendment.
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Jen Psaki breaks down why Donald Trump cannot claim that the E. Jean Carroll verdict was political. Psaki explains, "This judgement was decided by a jury, made up of nine ordinary citizens. Not George Soros. Not Joe Biden. Not Jack Smith. Nine ordinary people decided $83 million was the right dollar amount to award E. Jean Carroll."
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15 Republican governors chose not to sign up for a federal program that will provide food assistance to low-income families in the summer while school is out. "Republicans don't really care about helping children," says MSNBC's Ayman Mohyeldin.
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SyFy shares how “An Occurrence at Owl Creek Bridge” won an Academy Award for Best Live-Action Short Subject in 1964.
The Twilight Zone (which regularly airs on SYFY) is one of the most celebrated and influential pieces of genre television ever produced, a landmark of the medium that inspired virtually every science fiction and suspense series that came after it in one way or another. Over the course of its run, the show won two Emmy Awards and a Golden Globe for its creator and host, Rod Serling, cementing its place as a television hit. Then, somehow, as its final season was still airing, The Twilight Zone also made its way to the Oscars stage… sort of.
Stephanie Grisham, former White House press secretary and communications director under Donald Trump, told MSNBC's Alex Witt that Melania Trump "has been really pressuring [Donald Trump] to go out there and defend himself in this particular case."
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Here’s a super-classy, custom-made Etched Tumblr Keycap. It’s made with translucent/opaque plastic etched to create a dreamy, elegant glow-through effect. Perfect for showing your cultural community posting cred on your next mechanical keyboard project.
Snaps onto any Cherry MX or compatible switch. Since the logo is centered, you’ll get a glow whether you have north or south-facing switches. It’s R4 profile so will work nicely as a stand-alone key or at the top row of your keyboards.
Note: This product is a single keycap, and key switches are not included!
Here at Adafruit, we love discovering new and exotic glowing things. Like moths to the flame, we were intrigued by these ‘chip on board’ ultra-flexible white LED Strips with a whopping 320 SMT LEDs per meter, soldered side-by-side and diffused with a thin silicone epoxy! They look a lot like neon or incandescent tubing or maybe really nice EL wire, but without the need for expensive transformers, glass tubing, or inert gasses. The strip itself is only 5mm wide, the casing is 8mm wide but can be removed.
Unlike addressable neopixel-dot strips, these lights have a continuous, light source, and unlike our ‘Neon’ tubing, they’re much thinner and more flexible (but don’t have a chunky diffused look) The trade-off for having a thin silicone cover and non-diffused tubing casing is that close up you can see the little hot spots between LEDs.
The silicone casing makes for a strong, durable, weather-proof casing. They’re not guaranteed for dunking underwater or long-term outdoor exposure, but they’re durable enough for outdoor projects like costumes, bike lighting, or festival decorations. Plus, with the adhesive backing, you can stick it where you please.
UPDI stands for Unified Program and Debug Interface, but this board is so smol and cute that we will call it the Unusually Playful Device Interfacer and pat its head when it does a good job. It’s designed to make programming modern ATtiny chips very easy because it has 3V or 5V power and logic select, power and transmit indicator LEDs, and a quick cable for poking into a breadboard.
We have been working a lot with ATtiny816, ATtiny817 and ATtiny1616 chips lately, as for our seesaw boards. And we’re often needing to program them with a CP2102-based breakout with a 1K resistor soldered between the RX and TX pins. But we were hankering for a nicer programmer!
Our QT Py boards are a great way to make very small microcontroller projects that pack a ton of power – and now we have a way for you to turn many QT Py boards into powerful CAN bus devices that are super small!
CAN Bus is a small-scale networking standard, originally designed for cars and, yes, busses, but is now used for many robotics or sensor networks that need better range and addressing than I2C, and don’t have the pins or computational ability to talk on Ethernet. CAN is 2 wire differential, which means it’s good for long distances and noisy environments.
Messages are sent at about 1Mbps rate – you set the frequency for the bus and then all ‘joiners’ must match it, and have an address before the packet so that each node can listen in to messages just for it. New nodes can be attached easily because they just need to connect to the two data lines anywhere in the shared net. Each CAN devices sends messages whenever it wants, and thanks to some clever data encoding, can detect if there’s a message collision and retransmit later.
It’s designed to run on the Adafruit Qualia ESP32-S3 for TTL RGB-666 Displays with a display that is at least 960px wide, but could be adapted to different display sizes or driver boards with modifications.
The input from the player comes from a single irresistibly press-able big red button. When you press the button, the chomper character turns around and starts moving in the opposite direction. You’ll need to press it frequently to stay away from the dreaded ghosts. However, when you chomp a big circular pellet, the ghosts become vulnerable to being eaten and start running away from you to try to avoid becoming dinner.
Everything mounts nicely into a recycled cardboard box. If you’d like to go the extra mile, you can fancy it out with decals, glue and paper, markers, or whatever other craft supplies you’ve got around.
Content Summary:
– The guide provides instructions for creating a 1D Chomper Tabletop Arcade Game, a CircuitPython port of the Paku Paku game, using Adafruit products and a cardboard box.
– The game features a single button control to avoid ghosts and eat pellets, with the display and microcontroller mounted inside a cardboard box that can be decorated with craft supplies.
Adafruit Products Used:
– The project runs on the Adafruit Qualia ESP32-S3 for TTL RGB-666 Displays, which acts as the game’s microcontroller and display driver.
– A Long TFT Display (240×960) or Looong TFT Display (320×960) is used to display the game’s visuals.
– The player interacts with the game using a single big red button, which is connected to the microcontroller to control the game character.
Every Thursday is #3dthursday here at Adafruit! The DIY 3D printing community has passion and dedication for making solid objects from digital models. Recently, we have noticed electronics projects integrated with 3D printed enclosures, brackets, and sculptures, so each Thursday we celebrate and highlight these bold pioneers!
Have you considered building a 3D project around an Arduino or other microcontroller? How about printing a bracket to mount your Raspberry Pi to the back of your HD monitor? And don’t forget the countless LED projects that are possible when you are modeling your projects in 3D!
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Dave Aronberg, State Attorney for Palm Beach County Florida and Alexi McCammond, Opinion Editor at the Washington Post join Alicia Menendez in for Nicolle Wallace on Deadline White House to discuss the continuing feud between Donald Trump and Florida governor Ron DeSantis, after the ex-presidential candidate said he would veto any attempt by the Florida legislature to pass a bill to use taxpayer funds to pay for the ex-Presidents legal bills.
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Former President Trump won the New Hampshire Republican primary with 54 percent of the vote, and former S.C. Gov. Nikki Haley took 43 percent. Claire McCaskill weighs in on the results.
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An LED watch with the heart of an analog. The always on hands sweep through the time just like a classic wristwatch. Via ar.bin on Hackaday:
The current through the LEDs, and therefore the brightness, is regulated by the centrally positioned LDR to ensure good readability even in bright sunlight.
A tilt switch which reduces, when the watch is placed horizontally, the voltage after 12 minutes by shutting down the LT3459 boost converter, so the LEDs no longer light up to save energy. The watch is powered by a Li-Ion button cell with 3.7 V / 74 mAh, which only needs to be charged after approx. 20 days with a daily wearing time of 10 hours. This is achieved by an average current consumption of approx. 0.15 mA. The Attiny1614 microcontroller is generally in deep sleep and is woken up every second for 1.4 ms by an interrupt from the real-time clock DS3231 in order to control the LEDs via the 10 shift-and-store registers HEF4094. After 20 ms, it is briefly woken up again by a timer interrupt to switch off the second LEDs. The watch is set by touch capacitively instead mechanical switch.
Every Wednesday is Wearable Wednesday here at Adafruit! We’re bringing you the blinkiest, most fashionable, innovative, and useful wearables from around the web and in our own original projects featuring our wearable Arduino-compatible platform, FLORA. Be sure to post up your wearables projects in the forums or send us a link and you might be featured here on Wearable Wednesday!
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Donald Trump and Nikki Haley are set to face off in New Hampshire on Tuesday, and John Heilemann travels to the state for an on-the-ground view of how voters are feeling.
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Nikki Haley received six votes with none going to former President Trump in the very first votes cast in New Hampshire. The town of Dixville Notch has cast their votes at midnight for 64 years.
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Former President Donald Trump spoke about competitor Nikki Haley’s chance at a New Hampshire polling site. Trump did not comment on whether he spoke to Florida Gov. Ron DeSantis following his withdrawal. NBC News' Kristen Welker analyzes Trump’s comments and explains how Haley’s campaign could hold up after the primary.
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The Adafruit MCP3421 18-Bit ADC is a simple, inexpensive, and easy to use 18-bit, 240 SPS, single-channel ADC with an I2C interface that can run up to 3.4MHz clock rate. A perfect component whenever you need an ADC that has differential inputs, adjustable gain, and a built in precision/low-drift reference voltage.
One of the trade-offs with getting 18-bit precision is that the ADC is not going to be very fast: you can configure the chip to do a faster 12-bit conversion at 240 SPS, but at 18-bits it slows down to 3.5 SPS.
That’s because the way a sigma-delta ADC works, it ‘guesses’ the analog voltage and uses a comparator to determine whether the input is higher or lower. Each ‘guess’ takes an extra step, and thus
halves the throughput, so 12-bit is 240 SPS, and 14-bit is 1/4 (2-bit) slower, 60 SPS. Ditto 16-bit is 1/4 slower, 15 SPS, and finally 18-bit is 3.75 SPS.
The MCP3421 is already set up for differential inputs, which means that you can read positive or negative differences between the two inputs, as long as both signals are between 0 and 2.048V. This means its not going to be great for reading stuff like potentiometers, where you have a single-end reading referenced to ground, and you want to read the full range from 0 to Vcc. It is great, however, for reading sensors like strain gauges, pressure sensors, or thermocouples.
To get you going fast, we spun up a custom-made PCB in theSTEMMA QT form factor, making it easy to interface with. The STEMMA QT connectors on either side are compatible with the SparkFun Qwiic I2C connectors. This allows you to make solderless connections between your development board and the MCP or to chain it with a wide range of other sensors and accessories using a compatible cable.
We’ve got so much happening here at Adafruit that it’s not always easy to keep up! Don’t fret, we’ve got you covered. Each week we’ll be posting a handy round-up of what we’ve been up to, ranging from learn guides to blog articles, videos, and more.
President Joe Biden will not be on the primary ballot in New Hampshire this week due to frustration over Biden’s decision to make South Carolina the first presidential primary. However, many Democratic voters in the state have still decided to help him win in New Hampshire through a largely unprecedented “write in” campaign, which could have an unpredictable outcome. NBC News’ Mike Memoli joins Jen Psaki to discuss Biden’s expectations and what’s at stake.
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Adafruit Grove and Stemma QT FeatherWing for all Feathers: The Adafruit Grove and Stemma QT FeatherWing for all Feathers allows folks to use many Grove devices with Feather boards! It fits nicely on top and has 3x Analog/Digital connectors, 1x UART connector and 2x I2C connectors. Not a ton, but enough to get many small projects going! We even managed to fit a vertical Stemma QT port on the end for another I2C connection.
Medium Surface Transducer with Wires – 4 Ohm 3 Watt: Turn any surface/wall/table etc into a speaker with a surface transducer. This type of speaker does not have a moving cone like most speakers you’ve seen. Instead, a small metal rod is wrapped with the voice coil. When current is pulsed through the coil, the magnetic field causes a piece of metal to expand and contract – and if it’s pressed against a surface it turns the transducer into a speaker!
Large Premium Solderless Breadboard: For really big projects, give yourself some room to work in, with a massive 2250-point breadboard – equivalent in size to three full-sized breadboards side by side.
The breadboards are mounted onto a metal plate and comes with 4 colored posts you can use with a bench-top supply. Four bumpers are included, to keep the board from slipping around your desk.
As of Dec 19, 2023 – This breadboard has been updated to Premium, making plugging and unplugging boards and headers a buttery-smooth operation thanks to upgraded spring clips.
Compact Switching Power Supply – Selectable Output 3-12VDC: Wow, is this not the most useful thing you did not know existed or what? It’s a switching wall adapter where you can easily change the voltage! It’s like a benchtop supply you can take with you anywhere.
This model is 10 Watts and has 6 selectable outputs ranging from 3V to 12VDC and up to 1.5A output. It has a 2-prong plug but takes 110VAC to 240VAC so you can use it anywhere with a simple plug adapter.
TT Motor Bi-Metal Gearbox Double Sided Axle and 1:90 Gear Ratio: These durable (but affordable!) gearbox motors (also known as ‘TT’ motors) are an easy, low-cost way to get your projects moving. This is a TT DC Bi-Metal Gearbox Motor with a gear ratio of 1:90, about double the ‘standard’ 1:48 ratio. That gives them higher torque but slower rotational speed. Since they’re slower, they’re good for robots where strength is more important than speed.
They look a lot like our yellow all-plastic-gearbox motors, but these have the output-half of the motor gears machined from steel, so they won’t strip as easily, and they’re twice as slow (and twice as powerful) given their lower gearbox ratio. The metal gears also mean they’re louder when running.
2V 0.3W Mini Solar Panel – ETFE – Voltaic P121: These panels come to us from Voltaic Systems, makers of fine solar-powered bags and packs. These are waterproof, scratch-resistant, and UV-resistant, and they use four high-efficiency monocrystalline SunPower cells with 22+% efficiency (praise the sun!). The panel is made of 4 cells with a nominal voltage of 0.5V each, so we call this a “2V” panel
They output a nominal 2V at 150 mA peak via two solder-able pads on the back. The panel is constructed with ETFE (Ethylene Tetrafluoroethylene), making it extremely durable and resistant to environmental elements, a superior upgrade to PET or laminate solar panel construction. They can easily stand up to typical outdoor use, including being dropped and leaned on.
5V 0.3W Mini Solar Panel – ETFE – Voltaic P122: Each cell has a nominal voltage of 0.5V so we call this a “5V” panel. Note the datasheet has it down as a 6V panel, because at max-power-point it will give you 5.9V
They output approximately 6V at 50 mA peak via two solder-able pads on the back.
5V 0.6W Mini Solar Panel – ETFE – Voltaic – P123: Each cell has a nominal voltage of 0.5V, so we call this a “5V” panel. Note the datasheet has it down as a 6V panel, because at max-power-point it will give you 6.1V
They output approximately 6V at 120 mA peak via two solder-able pads on the back.
Adafruit Feather nRF52840 Sense: The Adafruit Feather Bluefruit Sense takes our popular Feather nRF52840 Express and adds a smorgasbord of sensors to make a great wireless sensor platform. This Feather microcontroller comes with Bluetooth Low Energy and native USB support featuring the nRF52840! This Feather is an ‘all-in-one’ Arduino-compatible + Bluetooth Low Energy with built in USB plus battery charging. With native USB it works great with CircuitPython, too.
Like the Feather nRF52840, this chip comes with Arduino IDE support – you can program the nRF52840 chip directly to take full advantage of the Cortex-M4 processor, and then calling into the Nordic SoftDevice radio stack when you need to communicate over BLE. Since the underlying API and peripherals are the same for the ‘832 and ‘840, you can supercharge your older nRF52832 projects with the same exact code, with a single recompile!
This Feather is also a BLE-friendly CircuitPython board!
MSNBC's Rev. Al Sharpton speaks with former Donald Trump lawyer Joe Tacopina. "There were things ... that didn't make me want to continue in that role," Tacopina said in his first interview since leaving the former president's legal team.
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The universe is 13.8 Billion years old and this newly discovered black hole is believed to be 13.4 billion years old. This would not only make it the oldest black hole discovered but an anomaly in the current models. Some working theories describe “black hole seeds” that would have formed in the first billion years of existence.
Physicists have previously put forward several scenarios for the origins of black holes, but because there hasn’t been a telescope powerful enough to glimpse that far back into time, they haven’t been able to test these ideas directly. That changed with the JWST.
“Before Webb came online, I thought maybe the universe isn’t so interesting when you go beyond what we could see with the Hubble Space Telescope,” said Maiolino. “But that hasn’t been the case at all: the universe has been quite generous in what it’s showing us, and this is just the beginning.”
It wasn’t that long ago when GOP Sen. Rand Paul expressed deep concerns about presidents having the ability to abuse authoritarian powers. Now, not so much.
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Certainly a conversation piece. Two ballbearings move up and down stepper driven spirals to display the time. Controlled with a a Raspberry Pi Pico. Really nice work from C Forde on hackster.io:
Where most marble clocks contain a large number of marbles, this design is minimalist in comparison and contains only two. Although ball bearings rather than marbles, one for hours and one for minutes.
A small digital clock display is included for information, time and time setting but given that this is a marble clock the digital clock can be switched off so as not to be a distraction to the main elements.
Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!
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Every Thursday is #3dthursday here at Adafruit! The DIY 3D printing community has passion and dedication for making solid objects from digital models. Recently, we have noticed electronics projects integrated with 3D printed enclosures, brackets, and sculptures, so each Thursday we celebrate and highlight these bold pioneers!
Have you considered building a 3D project around an Arduino or other microcontroller? How about printing a bracket to mount your Raspberry Pi to the back of your HD monitor? And don’t forget the countless LED projects that are possible when you are modeling your projects in 3D!
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The Supreme Court heard arguments about Chevron deference, which comes from the longtime precedent under which courts defer to administrative agency expertise.
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On the eve of Martin Luther King Day, Jonathan Capehart sat down with Dr. Clarence Jones, Dr. King's former speechwriter, to discuss how the civil rights icon would respond to Donald Trump and GOP attempts to rewrite American history. Dr. Jones believes MLK would label the former president "a moral fraud."
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Game of Thrones adapters Benioff and Weiss are bringing their extraordinary skill at writing strong beginnings, complex middles, and rewarding endings to the globally successful science fiction series, The Three-Body Problem. Written by Liu Cixin, the book is the first in the Remembrance of Earth’s Past trilogy. While the series is currently the most well-known science fiction series from China, Cixin’s work is the tip of the iceberg. Here’s more from Xia Jia at Tor:
After the lull imposed by the Cultural Revolution, the passion for building a modern nation state reignited in 1978. Ye Yonglie’s Little Smart Roaming the Future (published August 1978), a thin volume filled with enticing visions of a future city seen through the eyes of a child, heralded a new wave of science fiction in China with its initial print run of 1.5 million copies. Paradoxically, as China actually modernized with the reforms of the Deng Xiaoping era, these enthusiastic dreams of the future gradually disappeared from Chinese science fiction. Readers and writers seemed to fall out of romantic, idealistic utopias and back into reality.
In 1987, Ye Yonglie published a short story called “Cold Dream at Dawn.” On a cold winter night in Shanghai, the protagonist has trouble falling asleep in his unheated home. A series of grand science fictional dreams fills his mind: geothermal heating, artificial suns, “reversing the South and North Poles,” even “covering Shanghai with a hot house glass dome.” However, reality intrudes in the form of concerns about whether the proposed projects would be approved, how to acquire the necessary materials and energy, potential international conflicts, and so forth—every vision ends up being rejected as unfeasible. “A thousand miles separate the lovers named Reality and Fantasy!” The distance and the gap, one surmises, demonstrate the anxiety and discomfort of the Chinese waking up from the fantasy of Communism.
As Congressional leaders ready a stopgap bill to punt spending deadlines to March, conservative hardliners continue to resist any chance of compromise. House Minority Whip Katherine Clark joins Jonathan Capehart to discuss what's next in the budget negotiation process.
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In one way or another it feels like most fiction that looks forward has a dystopian twinge. But what is Dystopian Fiction in Film and TV? A look at a genre that revels in the chaos from NoFilmSchool:
Inside these creations lies a greater metaphor about what it takes to survive. I love any opportunity we have to strip away the niceties on the surface and really get down to what it means to be human, so dystopian fiction is near and dear to my heart.
Along the way, we’ll escape cannibals, learn about the value of life, and take ourselves back to our basal instincts.
A new poll out of Iowa shows who Caucus-goers would vote for if Trump became the nominee. Ali Velshi is joined by Vox correspondent Zack Beauchamp, as well as NBC News’ Vaughn Hillyard and Dasha Burns, to discuss the latest polling and the unprecedented inevitability of Trump’s win. “There is no competitive Republican primary. There is a Donald Trump coronation,” Beauchamp tells Velshi. “And there's a bunch of people who are jockeying to do something that is kind of like running for pr
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As published in The Astrophysical Journal Letters, astronomer Amir Siraj presents a mathematical argument outlining the probability that a rogue planet about the size of Mars exists in the outer solar system. via SyFy
There is no empirical evidence that another planet exists beyond the orbit of Pluto, and Siraj offers only a statistical foundation for the possibility. Next steps should involve an attempt to locate and directly observe any such planets. That might be achieved with the Vera C. Rubin Observatory, currently being built in Chile, provided that the hypothetical captured planet is close enough, bright enough, and visible from the Southern Hemisphere.
House and Senate leaders have reached an agreement on a short-term spending deal that would extend two upcoming deadlines to keep the government funded until March.
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More than just doom and gloom; informative piece on how and why NASA is involved in tracking Earth’s temperature. The greenhouse effect was actually discoverd on Venus.
Earth’s average surface temperature in 2023 was the warmest on record, according to an analysis by NASA. Global temperatures last year were around 2.1 degrees Fahrenheit (1.2 degrees Celsius) above the average for NASA’s baseline period (1951-1980), scientists from NASA’s Goddard Institute for Space Studies (GISS) in New York reported.
Political threats have surged ahead of the 2024 election. MSNBC’s The Weekend co-hosts discuss how those threats are shaping the political landscape in America.
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A bipartisan pair of Florida state representatives is trying to reverse a policy that requires schools to teach that slavery carried "personal benefits" for enslaved people.
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The decision in Massachusetts is significant in its own right, while serving as a reminder that states can provide broader rights than the U.S. Supreme Court.
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Every Thursday is #3dthursday here at Adafruit! The DIY 3D printing community has passion and dedication for making solid objects from digital models. Recently, we have noticed electronics projects integrated with 3D printed enclosures, brackets, and sculptures, so each Thursday we celebrate and highlight these bold pioneers!
Have you considered building a 3D project around an Arduino or other microcontroller? How about printing a bracket to mount your Raspberry Pi to the back of your HD monitor? And don’t forget the countless LED projects that are possible when you are modeling your projects in 3D!
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