Tag Archives: Adafruit Pro Trinket

Take a ride around the golf course in this DeLorean cart


“Are you telling me you built a time machine… out of a DeLorean (golf cart)?”


The DeLorean DMC-12 was a sport car manufactured by the DeLorean Motor Company from 1981 to 1983. The car featured a set of gull-wing doors, an innovative fiberglass chassis and underbody structure, along with a brushed stainless steel body. However, it was the Back to the Future trilogy that made this vehicle a piece of pop culture history.

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But where we’re going now, we don’t need an actual DeLorean… That’s because a pair of Canadian auto enthusiasts, Lucas Evanochko and David Heykants, have created their very own version of the iconic time-travelling car — only this time, in the form of a golf cart. You’ll notice that it has the same grey body work, vibrant blue lighting, a flux capacitor and everything else you could possibly imagine from Doc’s ride.

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There’s even multi-colored buttons from Retroactive Arcade on the dash, which are attached to an Adafruit Audio FX board. When pressed, they emit several BttF sound effects as well as some of Doc, Marty McFly and Biff’s most famous catchphrases. The sound system uses an 80W class D amp with Bluetooth to allow streaming from any device, too. Additionally, it boasts a built-in seven-inch tablet right in front, which runs the Fluxy88 Time Circuits app and Google Play Music.

All the accessories are juiced up by an isolated 12V system, which is fed off a garden tractor battery mounted under the hood. There’s also a 12V to 5V converter, which provides power to the Adafruit AudioFX and the tablet. Oh, and the capacitor, that’s controlled by an Adafruit Pro Trinket (ATmega328).

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From start to finish, nearly 600 hours went into this extremely impressive (and nostalgic) project. And while this vehicle may not travel back in time, even if you’re lucky to hit 8.8 mph), it definitely will look a whole lot cooler than any other cart you’ll find driving around the golf course!

Tinker Tie is a hackable LED bow-tie


The Tinker Tie is a fully-programmable, Arduino-compatible LED bow-tie that can last over 20 hours on a single charge.


Fred Astaire. Pee-Wee Herman. Bill Nye. Justin Timberlake. From celebs to businessmen, what’s not to love about the always classic look of the bow-tie? Although for years this ribbon of fabric has been made from silk, polyester, cotton or a mixture of materials, the Atom Computer crew is looking to bring the fashion accessory into the wearable tech era. Introducing the Tinker Tie.

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The Tinker Tie is a colorful and customizable device with 28 RGB LEDs that’ll surely add a little pizazz to your prom tuxedo, EDM concert attire or Halloween costume. Based on an Adafruit Pro Trinket (ATmega328), the piece can be programmed using the Arduino IDE and Adafruit NeoPixel library to emit countless color changes and animations as you illuminate the night.

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Data is received by the first LED, then sent through to the rest of the lights in a zig-zag pattern. Because of a special chip built into each LED, you can (magically) control an entire array of lights from only one data pin. Meanwhile, an integrated 500mAh LiPo battery pack provides over 20 hours of enjoyment on a single charge. Once it’s all drained out, simply plug in the Tinker Tie to your computer via USB and quickly refuel.

For its Kickstarter launch, the tie will ship in either fully assembled or kit form. And not only is it clearly an attention-grabbing fashion statement, it can be an excellent educational tool as well! Although the current PCB color for prototypes is green, the team hopes to upgrade to fancy black circuit boards in the very near future.

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Want to stand out at your next party? Want to light up the stage? Want to turn some heads at Maker Faire? Whatever your desire, you can head over to Tinker Tie’s page here.

A Pro Trinket-based movement alarm for your bag


A portable, battery-powered device that sounds an alarm when your bag is moved. 


Your pocketbook. Your backpack. Your gym bag. Each of which hold a number of expensive, personal belongings. And, as you know from walking around the mall, through campus, into the gym, or throughout an event like Maker Faire, lugging around a hefty bag can be a burden. Wouldn’t it be much easier to set it down, give your shoulders a rest and have a peace of mind that no one will take it? Well, a Maker by the name of “MakerSelf” has devised a solution that will allow us to do so: a motion sensing bag alarm.

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Based on a Pro Trinket (ATmega328), the Movement Alarm is a portable, battery-powered device that sounds an alarm when your bag is moved. Once armed, it can only be turned off by your secret code.

For those who may not know, the Pro Trinket is a sort of break out board for the fan-favorite ATmega328 MCU. A “big” sister to the original, uber-mini Trinket (ATtiny85), the board offers the familiarity of an Arduino Pro Mini with more pins and a USB thrown in the mix. With the Pro, Makers have the choice of either programming with the Arduino IDE, using AVRdude with the “-c usbtiny” programmer flag, or flashing the chip directly with an AVR programmer like the AVR Dragon.

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In this case, MakerSelf hooked the Trinket to a GY-521 accelerometer to enable the detection of movement. Therefore, when the Trinket senses that the device has been set into motion, such as picked up or removed from its resting place, it emits a high-pitched alarm from its built-in piezo speaker.

“It is 9V battery operated, but without an on/off switch, otherwise the potential thief could just hit the off button. As a result, I have an ‘arm’ button, and then you have 20 second to but the bag + device stationary,” MakerSelf adds.

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Once armed, if the bag/device is moved for more than 5 seconds and above a certain threshold level, it sounds an annoyingly loud alarm until the correct code is entered. The secret code uses a four-button interface, but the code itself can be any length and easily modified in the Trinket software. After the passcode is entered, the status LED will turn solid indicating to the user that the device must be placed stationary. The status LED will turn off after the designated time period, advising that the alarm is now armed and listening to the accelerometer.

If the bag is moved for more than five seconds at a time, the alarm will sound. Just in case that someone needs a piece of gum, phone or some other item from their bag, entering the secret code after or during the settling time, the status LED will blink once long, followed by three short, and then the device will turn itself off without turning the alarm on.

Intrigued? Head over to the alarm device’s official Hackaday.io project page here.

Maker decks out his wingsuit with 300 LEDs for a night jump


We’re not quite sure what it is, but there’s certainly something magical about watching hundreds of LEDs fly brilliantly through a night sky.


In preparation for this most recent jump, skydiver Nikko Mamallo embedded his Squirrel FUNK wingsuit with 10 Adafruit NeoPixel strips — three in each wing, four in the tail. As you can imagine, with 300 animated LEDs in total, this made for one unique experience. (Not to mention, countless “UFO sightings” from onlookers.)

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According to Mamallo, the entire build took approximately two months to go from mere concept to flight. The LEDs were programmed using an Adafruit Pro Trinket (ATmega328). The Maker also added a NeoPixel status light to the board, a trigger switch to start the LED animations inside his wingsuit belly pouch, and a killswitch in his glove to turn the lights off/on if necessary.

“Though I built this with the skydiving environment in mind, there are a few things I’d change for a V2 to make it a little more robust and durable as I did break one of the strips on the daytime test flight when I crushed it sitting on the floor of the caravan and I did have a data short on my left wing from a loose data cable,” Mamallo writes.

Footage of the late night dive from 13,000’ was captured using a GoPro Hero 3+ Black and a GoPro Hero 4 — which you can watch below.

Adafruit’s Pro Trinket gets the Hackaday.io treatment

Last year, Adafruit launched the Trinket, a tiny microcontroller board built around our ATtiny85. Then back in August, they shared the news that the uber-mini board was getting a big sister, the Pro Trinket. Based on the incredibly-popular, Maker favorite ATmega328, the Pro Trinket offers the familiarity of an Arduino Pro Mini with more pins and USB thrown in the mix.

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Today, paying homage to our friends at Hackaday, the Adafruit crew has even unveiled an Hackaday.io branded Pro Trinket — black solder mask, Jolly Wrencher and all. And, it’s stunning.

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As Hackaday points out, the board features a micro-USB plug on one end, integrated voltage regulator, 16MHz crystal oscillator, and the chip is running a modified version of V-USB (meaning that it can be programmed via USB). With the Pro Trinket, Makers have the choice of either programming with the Arduino IDE, using AVRdude with the “-c usbtiny” programmer flag, or flashing the chip directly with an AVR programmer like the AVR Dragon.

Don’t let its size fool you. The super small Pro Trinket boasts more flash and more RAM — 18 GPIO, a pair of extra analog inputs, 28K of flash, and 2K of RAM. While the Pro Trinket may only measure 1.5″ x 0.7″ x 0.2″ (without headers), it possesses the same capabilities as a much larger Arduino Uno.

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Aside from the on-board ATmega328P, other key specifications include:

  • 16MHz clock rate, 28K FLASH available
  • USB bootloader with an LED indicator
  • Headers for an FTDI port for reprogramming
  • Micro-USB jack for power and/or USB uploading
  • On-board 5.0V power regulator with 150mA output capability and ultra-low dropout
  • Power with either USB or external output (such as a battery)
  • On-board green power LED and red pin #13 LED
  • Reset button for entering the bootloader or restarting the program.
  • Works with 99% of existing Arduino sketches (anything that doesn’t use more than 28K, and doesn’t require pins #2 and #7)
  • Mounting holes

According to our pals over at Hackaday, “This is also perfect for taking with you on the road. The board is so small you’ll always have space for it. I already travel with an external battery and a micro-USB cable for topping off my cellphone. These will work perfectly as a power source and programming cable for the Trinket Pro. The board itself and any hardware I want to hang off of it is all that I’m adding to my backpack. Above you can see the quick proof-of-concept I made while at the Hackaday anniversary party. It’s a row of 8 LEDs and some current-limiting resistors. Want to try your hand with PWM and visualization? You can do it on a plane, you can do it on a train, or a bus, or a boat (Trinket prototyping while bicycling is not recommended).”

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Are you just wrapping up a prototype on an Arduino Uno and looking to shrink it down? Do it in style with the Hackaday.io Pro Trinket. Interested? Head on over to the official Hackaday Store here.

Meanwhile, following the success of their 10th anniversary Trinket Pro boards, Hackaday has just announced their latest Trinket Everyday Carry Contest, which encourages Makers to create pocket-sized electronics projects using the ATmega328 based board.