A Simon game built into an ATtiny84 in a DIP-14 package.

2024 Tiny Games Contest: Spectacular Sub-Surface Simon

September 12, 2024 by Kristina Panos 16 Comments

When you work with tiny things on the regular, they start to seem normal-sized to your hands and eyes. Then, if you work with even smaller packages, stuff like 0603 might as well be through-hole components.

[alnwlsn] is no stranger to the small, having worked almost exclusively with surface mount components for a few years now. Even so, they’ve built up an admirable stock of DIP chips, including the ATtiny84 DIP-14 that their incredible Simon game is built into.

How in the world did [alnwlsn] accomplish this? As you’ll see in the video after the break, the answer lies in milling, but with the motors disconnected and manually turning the knobs.

Soldering didn’t require anything special, just the usual suspects like a fine-tipped iron, an X-acto knife, some tweezers, and a few other things like a hot air gun for soldering fine wires to the leadframe. Oh, and of course, really steady hands, and lots of patience.

The 2024 Tiny Games Contest officially closed on Tuesday, September 10th. We’ll have the results out as soon as possible. Best of luck to all who entered!

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A tiny colorful slot machine that uses LEDs instead of fruits or numbers.

2024 Tiny Games Contest: Micro One-Armed Bandit Hits The Cuteness Jackpot

September 11, 2024 by Kristina Panos 3 Comments

They don’t call slot machines one-armed bandits for nothing. And although it’s getting harder and harder to find slot machines with actual pull-able handles instead of just big buttons, you can easily simulate the handle at home with the right kind of limit switch, as [Andrew Smith] did with this micro slot machine.

This baby slot machine is built around the Adafruit 5×5 NeoPixel grid, which is an add-on for the QT Py. As you’ll see in the brief demo video after the break, the switch actuates on release, which starts the lights a-spinning. [Andrew] says the constraints of the SAMD21-powered QT Py made this a particularly fun challenge.

Whereas most physical slot machines have different reel sequences, this build uses just one. [Andrew] declared hex values to ID each color, and then created the reel manually with different color frequencies. When the lever is released, the columns are animated and slowly to come to rest at a random offset. You can check out the code on GitHub.

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DOOM On A Volumetric Display

September 9, 2024 by Dave Rowntree 15 Comments

There’s something magical about volumetric displays. They really need to be perceived in person, and no amount of static or video photography will ever do them justice. [AncientJames] has built a few, and we’re reporting on his progress, mostly because he got it to run a playable port of DOOM.

Base view of an earlier version showing the motor drive and PSU

As we’ve seen before, DOOM is very much a 3D game viewed on a 2D display using all manner of clever tricks and optimizations. The background visual gives a 3D effect, but the game’s sprites are definitely very solidly in 2D land. As we’ll see, that wasn’t good enough for [James].

The basic concept relies on a pair of 128 x 64 LED display matrix modules sitting atop a rotating platform. The 3D printed platform holds the displays vertically, with the LEDs lined up with the diameter, meaning the electronics hang off the back, creating some imbalance.

Lead, in the form of the type used for traditional window leading, was used as a counterbalance. A Raspberry Pi 4 with a modified version of this LED driver HAT is rotating with the displays. The Pi and both displays are fed power from individual Mini560 buck modules, taking their input from a 12 V 100 W Mean-Well power supply via a car alternator slip ring setup. (Part numbers ABH6004S and ASL9009 for those interested.) Finally, to synchronise the setup, a simple IR photo interrupter signals the Pi via an interrupt.

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An incredibly small gaming console with cartridges, each bearing an ATtiny10.

2024 Tiny Games Contest: An Epic Minimalist Entertainment System, Indeed

September 8, 2024 by Kristina Panos 2 Comments

One way to keep things tiny is to make a system with cartridges where the brain lives on each cartridge instead of the platform itself. [Michael]’s Epic Minimalist Entertainment System (EMES) is one of those, and boy, is it tiny. EMES makes use of the ATtiny10, and they don’t get much AT-tinier than that.

This nearly microscopic console uses an equally Lilliputian display — a Plessey GPD340 vintage LED display, in fact. (Check out [Michael]’s reverse engineering project if you want to play around with these.) There are four ultra-small buttons for control and a buzzer for sound.

Now, the ATtiny10 is an 8Mhz microcontroller with 1KB of flash and 32 bytes of RAM. It has an 8-bit ADC and a somewhat surprisingly high four GPIO pins. But of course, that’s not enough. Not with the display, the four buttons, and the buzzer, so [Michael] had to come up with a way to multiplex everything to four GPIOs.

PB0 is shared between the buttons and the display’s serial data input. PB1 cleverly outputs the same PWM for both the brightness control and the buzzer. When the buzzer is needed, [Michael]’s code switches to a lower frequency and adjusts the duty cycle of the display to keep it readable. PB2 and 3 are serial clock inputs for the two display halves. Be sure to check it out the heated PONG action in the video after the break!

There’s still a little bit of time to enter the 2024 Tiny Games Contest! You have until Tuesday, September 10th, so head on over to Hackaday.IO and get started!

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A light-dependent resistor detects cacti in the Google Chrome Offline Dinosaur game.

Jump Cacti With An LDR And A Pico

September 6, 2024 by Kristina Panos 6 Comments

By now, probably everyone is familiar with the “You’re Offline” dinosaur that stars in Google’s T. Rex game. You know — jump cacti, avoid pterodactyls. Repeat until you lose, or, we suppose, make the leaderboard. Well, what if you theoretically couldn’t lose? That’s kind of the idea behind [Bas BotBerg]’s cactus detection-and-avoidance scheme (translated from Dutch).

Like many of us, [Bas] firmly believes that repetitive tasks should be automated, and that includes the controls of the famous T. Rex. Since the cacti are always dark gray and appear along the same plane, it’s easy to register the difference between cacti and screen electronically. In order to accomplish this, [Bas] is using a light-dependent resistor and a pull-up resistor to create a resistance bridge, which is then connected to an analog input pin on a Raspberry Pi Pico.

But [Bas] didn’t do this just to cheat at Offline Dinosaur. Really! It’s for educational purposes, to get people comfortable with embedded processing, sensors, and interfaces between different devices. Check it out in brief action after the break.

Once they get familiar with these concepts, maybe introduce the ESP32 version of Offline Dinosaur.

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A small handheld word game called Batch Craze, where one player tries to get another to guess the word on the screen.

2024 Tiny Games Contest: Batch Craze Is Portable Charades, Kind Of

September 3, 2024 by Kristina Panos No comments

So there’s this commercial electronic game out there called Catch Phrase, which, as the game’s own catch phrase explains, is the game that’s played one word at a time. See, a word comes up on the screen, and you have to get the other person or team to guess what it is using gestures and such before the timer goes off. There are a bunch of rules, like you can’t say a word that rhymes, give the first letter, or the number of syllables.

Well, [ahixson1230] and company got their hands on the After Dark NSFW version but found it lacking in the edginess department. So naturally, [ahixson1230] was inspired to build a better one, with a touch screen in lieu of buttons, and a way for players to suggest words to be added to the list. In this version, a player presses anywhere on the screen to start the game, and a random word or phrase comes up. They act it out, get the other person to guess, and then pass the unit over to continue the fun.

Batch Craze is based on the Cheap Yellow Display, aka the ESP32-2432S028R, and [ahixson1230] highly recommends [witnessmenow]’s excellent resource on the subject. As of this writing, [ahixson1230] is still trying to get the speaker to work, and welcomes any help. Can you assist?

There’s still time to enter the 2024 Tiny Games Contest! You have until Tuesday, September 10th, so head on over to Hackaday.IO and get started!

The Morse Quest game in semi-darkness to show off the dit-dahing light.

2024 Tiny Games Contest: Morse Quest Goes Where You Do

September 2, 2024 by Kristina Panos 11 Comments

Do you know Morse code already? Or are you maybe trying to learn so you can be an old school ham? Either way, you could have a lot of fun with [felix]’s great little entry into the 2024 Tiny Games Contest — Morse Quest.

This minimalist text-based adventure game is played entirely in Morse code. That is, the story line, all the clues, and the challenges along the way are presented by a blinking LED. In turn, commands like LOOK, TAKE, and INVENTORY are entered with the slim key on the lower right side. A wee potentiometer allows the player to adjust the blink rate of the LED, so it’s fun for all experience levels. Of course, one could always keep a Morse chart handy.

The brains of this operation is an Arduino Nano, and there’s really not much more to the BOM than that. It runs on a 9 V, so theoretically it could be taken anywhere you want to escape reality for a while. Be sure to check out the demo video after the break.

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