This is updated version of my Tweezers Rack from 2015. Remodelled in OpenSCAD (and made parametric). Made the mounting easier by placing the screw holes elsewhere.
Rubrika 3D tisk
Grid Cipher (sometimes also called a grid code) is very simple transposition block symmetric encryption algorithm. It is not usable for any serious cryptography nowadays, but still can be used for games and entertainment. Traditionally, the grids are created by hand by cutting them from paper. But this process is tedious and prone to errors. So I automated it using 3D printer. This SCAD file will randomly generate a valid cipher grid each time it's rendered. See variables in source code for customization options. For your convenience, there are several pre-generated grids available for download, if you don't have OpenSCAD installed.
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.
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
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.
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.
Friend of mine wanted a LED light for her fish tank. But cost of one is about $ 25. So we created one ourselves, for about $ 5: just a piece of LED strip, strip of flexible plastic and old 12 V charger I had lying around and 3D-printed brackets to hold the plastic with LED strip on the side of the tank. Oh, and about 15 minutes of soldering (since she was doing it for second time in her life) and half hour of printing.
This is simple box for a common small thermometer module, available from AliExpress. I use it to monitor temperature inside my 3D printer box. Use customizer to modify displayed text.
After I did my Cookie stamper project, a friend asked me if I could make a cookie cutter of hexagonal shape with a bee stamp. Of couse I can! So, here I proudly present you the hexagonal cutter, superb for work efficiency! The entire system isn't modular, as I don't expect multiple motifs for hexagonal cookies.