pockeTETRIS: compact Tetris clone using ATtiny85 and OLED

[dombeef] originally built pocketTETRIS as a Father’s Day gift for his Tetris-loving pops. However, having finished the project he’s decided to share it with the universe, and it’s looking rather sweet. He made the game the smallest he could make, with size limitations imposed by a 0.96” OLED display, the coin-cell battery pack, and his desire…

via Mini Tetris Game Packs a Tiny85 — Hackaday

pockeTETRIS: compact Tetris clone using ATtiny85 and OLED

ATXMega32E5 adapted for a breadboard

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ATXMega32E5 breakout board

The ATXMega32E5 is the next step up for those experienced with the AVR series of microcontrollers from Microchip (formerly Atmel). They use the same compilers and libraries as the rest of the AVR 8- and 16-bit families, but they can run at 32 MHz and have an amazingly powerful set of internal peripherals that can take your projects to the next level and beyond.

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For prototyping, however, the disadvantage is that the XMega chips are not available as through-hole parts. That’s where this breakout board comes into play.

nsayer has shared the board on OSH Park:

ATXMega_E5 breakout v1.0

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Order from OSH Park

ATXMega32E5 adapted for a breadboard

Orthrus: secure two-card storage

From Nick Sayer on Hackaday.io:

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Orthrus: SD card secure RAID USB storage

This project is a hardware mechanism to provide secure “two man control” over a data store. It is a USB microSD card reader, but it requires two cards. The data is striped in the style of RAID 0, but the data is also encrypted with a key that is stored in a key storage block on each card. In essence, each card is useless without the other. With possession of both cards, the data is available without restriction, but with only one, the remaining data is completely opaque.

This allows you to securely transport a data set by writing it onto a pair of cards and separately transporting them to a destination for recombination.

The intent is that only the pairing of two cards becomes in any way special. A card pair could be inserted in any Orthrus device and the data would be made available. But with only one card, all you get is half of the data encrypted with a key which you only half-possess.

The firmware source code is available on GitHub:

githubnsayer/Orthrus

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The assembled board is available on Tindie:

Screenshot from 2017-05-05 18-25-42

Orthrus: secure two-card storage

EEEmu SPI

Blecky’s latest project on Hackaday.io is an EEPROM/Flash emulator with a fun name:

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EEEmu SPI

The EEEmu SPI emulates any Serial Peripheral Interface Bus EEPROM or Flash memory chipsets up to an interface speed of 25MHz. It also supports any supply and interface voltage between 1.8 to 5 Volts and can be configured to support even the largest of memory sizes.

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This repository contains configurations for all the currently supported EEPROM and Flash chips for the EEEmu SPI:

githubEEEmu/Supported-Devices

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EEEmu SPI

Resurrecting a Psion Series 5 PDA

RasmusB on Hackaday.io is resurrecting a Psion Series 5 PDA:

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Psioπ

Bringing a Psion Series 5 into this decade by replacing all the important bits.

The completed result will (hopefully) be a portable modern Linux system with all the connectivity options expected in a modern device.

The keyboard adapter board is available on Tindie:

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USB keyboard adapter for Psion Series 5 keyboards

This is an USB interface for Psion series 5 PDA keyboards. Plug in a keyboard and a USB cable, and use it with any modern computer!

The design files and source code are available on GitHub:

github-smallRasmusB/PsioPi

Resurrecting a Psion Series 5 PDA

Musical Toothbrush by Joe Grand

Hackaday wrote about a nifty hack by Joe Grand:

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[Joe Grand’s] Toothbrush Plays Music That Doesn’t Suck

It’s not too exciting that [Joe Grand] has a toothbrush that plays music inside your head. That’s actually a trick that the manufacturer pulled off. It’s that [Joe] gave his toothbrush an SD card slot for music that doesn’t suck. The victim donor hardware for this project is a toothbrush meant for kids called Tooth Tunes.…

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Joe published full documentation for the project on his website:

The PCB is shared on OSH Park:

Tooth Tunes Hack

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Order from OSH Park

Joe describes the project in this video:

Hear the toothbrush in action:

Musical Toothbrush by Joe Grand