8219 Results for "3D printing"

Capturing LED state from washing machine
Log from Converting IKEA RODRET into a switch digitizer
This is the extension to capture the state of an LED from any device (in my case, a washing machine). The circuit's main component is an LPT 80 A phototransistor. If the state changes from dark to illuminated, a short pulse is outputted. R5 (100 KOhm)...

Using voltage reference for ADC
Log from ATtiny 1-series with Arduino support
We probably all got to a point where we must start using a multi-meter to analyze our circuit, and very often we want to measure the voltage. Putting one of the probes on voltage source will not give us any feedback, the second must be connected to a...

Random Notes
Log from MidiFoot
Just a dump of random text file notes - please don't judge :)understanding usb:https://www.beyondlogic.org/usbnutshell/usb1.shtml teensy midi stuffhttps://www.pjrc.com/teensy/td_midi.html arduino pro micro would be way cheaper, or maybe this guy's v-usb...

Closing the feedback loop
Log from Nixie Tube 170 V flyback DC-DC power converter
A converter needs a feedback mechanism to maintain voltage regulation. The choice of a duty cycle only works for a particular set of load resistance and input voltage. Variations, large and small, need to be corrected to maintain a stable output voltage...

Project Log 6: These AI's are out of control.
Log from DIY Full-body VR Rigid Haptic Suit
Today is Saturday, 17 of december, 16:57 Brasilia timezone Well, sorry for the silence, I'm trying my best. So, well, there is an AI called "ChatGPT" which is a chat bot that can code for you. I can literally ask for equations about temperature, electricity...

Geyser mode! This thing needs more safety measures.
Log from vapsy
I ran two tests today:does the overtemperature detection for the heaters work?how does the system act with galden inside?Overtemperature DetectionWell, this one was easy. I implemented the overtemperature detection described in the previous log, fired...

Calculating Scotopic Luminous Flux
Log from TritiLED
I'm working on a new circuit (really!), but did these calculations last night, and thought the results were interesting. LED datasheets often quote the luminous flux in lumens, based on the daytime visual sensitivity curve (photopic vision). This is...

Log #4: Integrals: the Other Half of Calculus
Log from Hacker Calculus
We have been talking about differential calculus- the study of how something is changing. There’s another half, though – called integral calculus. Loosely speaking, integral calculus is the process of reversing what you do with differential calculus....

Numerically Solving the 1D Transient Heat Equation
Log from RepKiln
In an earlier log we looked at the steady-state conditions to get an idea for how hot the inside of the kiln would get. This helped us get an idea for what thermal conductivity, wall thickness, and heater wattage were acceptable for getting the kiln...

Beginning the design of the robot camera mast
Log from Quamera Gen 2
In addition to all of the EE work in bringing up the other two Beaglebones and 16 new cameras, I’ve started designing the robotic platform that will carry the camera. Right now, the single equatorial ring lives on the static platform shown here.The...

Adding a vacuum table - the best upgrade!
Log from Sub $200 PCB Mill that doesn't suck!
There are upgrades and there are upgrades. Sometimes, an upgrade is a small thing. An LED here, a new line of code that improves things there... this is a major major livability improvement that I wasn't expecting to work this well: I added a vacuum...

July 2021: Pump up the volume
Log from The Metabolizer
[UPDATE 10/21/2021 -After 2018 I started posting my updates on my Patreon page, and so I'm filling in the back-logs for this project retroactively so the whole story is in both places. You can also read all of these posts with their original photo...

Project Log 62: DIY Hydrogen Tanks, do not do it.
Log from DIY Mech/Exoskeleton suit.
Thursday, 13/07/2023, 11:58. I do NOT advise you to follow my ideas and you should NOT try this at home. Before you seriously think on doing such thing at home, just remember the carbon fiber submarine. You may not fear death, but are you ready to die...

User Interface - Version 2
Log from Badminton ACE Shuttle Launcher
With version 2 of the application I decided on a radical redesign. Version 1 was very functional but it was hard to adjust the shots quickly. When a beginner player came to try it there was no way to reduce the difficulty without just limiting the shot...

Mechanical Design Specifications
Log from 2021 HDP Dream Team: EJA
The Eja ropeless gear system consists of three parts: Release Mechanism, Intelligent Buoy, and Onboard Gateway. Here are the mechanical design specifications for each, also available as a pdf here. Release Mechanism 3D viewer: https://a360.co/3msDSha...

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