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Create a Custom Dental Impression - Alginate Negative Impression
Instructions from Intraoral Respiration Monitor & Overdose Detector
The respiration monitor electronics are built into a clear ultra-thin custom retainer. This retainer keeps the sensors and other electronics correctly positioned and also acts as a protective barrier between the electronics and the sensitive skin inside...

Create a Custom Dental Impression - Bondo Positive Impression
Instructions from Intraoral Respiration Monitor & Overdose Detector
The fragile alginate negative impression is used as a mold to create a tough heat resistant positive impression. The positive impression will be used to form the specialized dental thermoplastic sheets into ultra-thin ultra-clear retainers. I use Bondo...

▇▇▇▇ What's Next? ▇▇▇▇
Instructions from FPGA Bootcamp #0
This has been a pretty grueling bootcamp, but you should now be comfortable with basic logic gates including AND, OR, NOT NAND, NOR, and XOR. You should know about flip flops and the difference between sequential and combinatorial logic. There's plenty...

Yet another laser engraver / cutter
Instructions from Yet another laser engraver / cutter
CalibrationCalibrating the X/Y-axis of a plotter or CNC machine is actually quite easy. I did it as described in this video. First i had to know the theoretical steps/mm per axis. To calculate this value I multipliedthe steps/rev. (200 for most NEMA...

Step 2: Photo Editing
Instructions from Coin Card
I'm using GIMP, just because I have used it a few times. It is easy enough to get used to, especially when you can google just about anything you want to do on it. First, I need to decide which colours can be merged into one. I have 4 colours to work...

Assemble the motor mount and first stage
Instructions from Astrophotography Camera Mount
Set the motor mount retainer on top of the stepper motor and attach with 4 x M3 screws. Press-fit the 5 : 1 sun gear with the motor shaft axle to the stepper motor shaft. (note: the motor mount STL doesn't have the four holes in the plate right...

Key dublication
Instructions from A simple casting mould for hot metal key copying
Step 1: Fill the cavity of the mould with Fimo or a equivalent polymer clay and flatten the clay e.g with a round pice of wood or core follower. To prevent the two clay parts from sticking together while making the key indentation, powder some talkum...

Manual SMT Pick and Place Machine
Instructions from Manual SMT Pick and Place Machine
Since we're going to actually hack a pre-existing product - a shop bought CNC engraving machine - the first step is to assemble the CNC engraving/laser machine - it comes as a kit with instructions of it's own (see below). The upright aluminium 2020...

Installing MQTT broker on Raspberry Pi
Instructions from Ultra low power WiFi home automation system
For this project we use an open source Mosquitto MQTT broker. It is lightweight and is suitable for use on all devices from low power single board computers to full servers. Before we start installing, it's a good practice to update the system components...

Removing the camera
Instructions from Multispectral imaging smartphone camera
The first step is the remove the camera from the Pixel 3a phone. The screen on this phone is pretty thin, so care should be taken. There are plenty of extensive descriptions of this process elsewhere online, so I will be brief. Separate the screen from...

Solder USB Connector
Instructions from SMT Garden
The USB connector is a nice through-hole connector. Even though it has tiny legs, you should have no problem with it with your new surface mount skills! We've also extended the pads in opposite directions to give you plenty of space for the...

Plexi
Instructions from LawnRobot
Get a plexiglass sheet of 4-5mm thick. Cut a piece of 40cm by 30 cm. (You can use whatever you have handy but will have to adjust the instructions for thickness) Try to cut it as square as possible. Use the 3D printed vertical motor mount to draw...

rhombus
Instructions from rhombus
Constructing the system by following Motorola's Application Note 1015 will be sufficient, with the exception that the schematic is missing 2 external connections on the MC68901. One of the timer outputs TCO or TDO needs to be tied to TC (transmit clock),...

Print the pieces for the hull.
Instructions from n3m0 the autonomous boat
I used PLA for the first hull, it's plenty strong but I worry when I have to leave it in my car on a hot day.https://www.thingiverse.com/thing:3491904 I will try ABS or PETG for the next boat. If you try this please let me know how it works. Files are...

Part 2: Ordering the boards and components
Instructions from High Efficiency MPPT Solar Charger
The first step is to get the boards and components. As some of you might be new to ordering custom boards, I quickly walk you through the process. Many of us hobbyists get their boards from dirtypcbs.com and that's where I get mine, too....

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