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DSO 138 Case With Stand
I remixed the case for DSO 138 oscilloscope. The main changes include adding a slanted stand and back plane to the original model. Everything is held together with six 2.2 x 9.5 mm screws - two to add the stand to the backplane and four to hold backplane, PCB and front part together.
Arduino-based Electronic Lock
This is servo-based door lock controlled by Arduino Nano and powered by standard SG90 servo. The means to open the lock can be anything, from simple keypad trough magnetic hall sensors to Bluetooth or RFID. This project contains complete material from Arduino Workshop SIG I did at ZodiaCon 2017. In addition to STLs, there are the following files available: Slides.pdf - presentation slides from my talk Handbook-CS.pdf - lab handbook in Czech language Handbook-EN.pdf - lab handbook in English language Code.zip - source code for all labs The following labs are included: Testing the environment (blinking the LED) Using the OH3144 Hall Sensor Using the 4x4 matrix keyboard Using the SG90 servo Simple lock controlled by magnetic sensor Simple lock controlled by keyboard Finished project - lock with changeable code stored in EEPROM. The following electronic components are required: Arduino Nano (or basically any Arduino, but the holder is designed for Nano) OH3144 Hall Sensor SG90 servo 4x4 matrix keyboard
MFRC522 + Arduino Nano Case
This is case for MFCR522 RFID reader and Arduino Nano. It's part of a bigger project you can find on GitHub. The other parts are Arduino firmware and C#/.NET library for communicating with the reader trough serial port.
WannaCrypt ukázal, co je v IT světě špatně
Útok WannaCrypt je typickou ukázkou toho, co je ve světě bezpečnosti špatně. Útok vznikl kvůli snaze NSA získat kybernetické zbraně, v důsledku úniku dat se k nim dostali zločinci. Máslo na hlavě mají postižení, neaktualizovali svoje systémy.
Colorful light from IKEA Pyssla beads
My daughter loves the Pyssla beads from IKEA - the ones you can heat with household iron and make colorful shapes off them. So we decided to make a LED lamp from them: Print the base on 3D printer. Make 5 colorful squares (10x10) from the Pyssla beads and flatten them with hot iron. Use hot glue to make a cube from the squares. Solder wires to the top part of LED legs (near the base). Solder single wire to each LED, one to anode and second to cathode of the other LED. Bend legs of two LEDs to right angle and put them into the base. Solder them parallel. Create battery contacts from thin sheet metal. I used a nickel strip used when making battery packs because I had it, but you can use metal from cans etc. Solder the wires to the metal contacts. Power with AAA batteries. The light does not have any on/off switch, because I don't have any locking switch such small at the moment, You can modify the base to fit the switch from bottom, if you wish. We are removing the batteries to turn it off.
Paradox závislosti na velkých firmách
Zákazníky veřejně málo známé společnosti Cloudflare jsou projekty jako Uber, Zendesk, Yelp Fitbit či zhruba tři tisíce českých webů. Před dvěma týdny se v systému Cloudflare objevila chyba. Jejím důsledkem bylo, že se za určitých okolností mohla náhodně část HTTP požadavku nebo odpovědi dostat do odpovědi jiného zákazníka. Včetně citlivých informací.