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no remote, no problem
Log from RC5 Madness
First I wanted to find out, If the power socket on the back would turn off, if the device was in standby. Unfortunately, I do not have a remote and no way to reach standby without it, just proper off and on. So I threw together a circuit and tried using...

DIY legendary op-amp Big Muff
Hacker page by teardownit
Welcome to my guitar effects workshop! Today, we will study the circuit and history of the pedal, which is copied and improved by dozens, if not hundreds of companies and masters. And, of course, we will build and listen to our own copy. Almost every...

Safety and IoT to plain-old heater
Details from Safety and IoT to plain-old heater
I don't have a RaspberryPi Zero. In the meanwhile I am prototyping with Arduino Nano.In most parts of Pakistan, winter is short. The intense cold, that requires the use of space heating only lasts for about 6 weeks. Most households do not have central...

Motivation
Log from 1Keyer
On my blog, I've written a number of posts about sending Morse code using the Arduino. They mostly have centered around using an Arduino as a beacon controller to automate the repeated sending of simple messages via Morse code. Despite being licensed...

[FW] The butchered code
Log from Hardware based RGBW Lamp controller
The initial, ideal version of the firmware was used on other projects, like this. It was implementing every step of the color generation, from the autowhite adjustment, to the main color selection, the PWM generation, the power monitor, the serial commands,...

Useability Testing: Finding Out Channels, And Is it Really Wearable?
Log from A Wearable, IoT+ANN Dev Board for Body Sensing
The next part of prototyping is figuring out if this is really useable for most kinds of wearables. When you do a search for wearable IoT development board, and this is kind of funny, there are two things that show up, and then my project on google....

Lattice-Boltzmann fluid flow in matlab
Details from Lattice-Boltzmann fluid flow in matlab
Lattice BoltzmannLattice Boltzmann methods can be used to simulate fluid flow on a grid of cells. The goal is to parallelize the LB calculation onto the FPGA, but there are a few steps to do first. First figure out the algorithm and tune it in matlab....

Coin Cell Discharge Tests
Log from Coin Cell Jump Starter
Early on I figured I'd need to test some CR2477 cells to see how much energy they could practically supply in a short time. I finally got around to building the tester and putting it to work (not to spoil the surprise, but things don't look great...

12/21/2017 - A suitable display is found, design of the PCB continues.
Log from Sinclair Scientific Calculator Emulator
A previous search revealed that there were LED modules that were 15mm wide and had 3 digits. We need 3 of those side to side to get the 9 digits a Sinclair Scientific needs. Previous implementations using two packs of 4 bubble LED modules needed...

Implementation
Log from Linux-ESPNOW
On the computer Library : A C++ library has been created to handle ESPNOW packets with Linux. You can find it here : ESPNOW_lib. The code also contains a main() that send back every ESPNOW packet received (it acts like an echo).If you want to use this...

Pressure
Log from MultiBot CNC v2
I'm really frustrated with my air compressor, it is just too darn loud! I have a Stanley Bostitch BTFP02012 6 gallon pancake compressor that is rated at 2.6 SCFM at 90 PSI with a peak pressure of 150 PSI. The claim is that it produces...

Crossfade attempt #1 - learning from failure
Log from Just Another Nixie Clock
Once I got the digits displaying, I wanted to crossfade them. This was something I had seen people talk about doing, and I saw videos of people successfully doing it, but I couldn't find examples of it being done. I figured the Arduino had...

User input control
Hacker page by Christoph Tack
Having only a 32x16 LED array to show data poses some limitations on the user interface. The Nokia 3310 interface could be used as an example. There are three functions in three buttons: C : Cancel = go back Middle : Select or Menu (which is actually...

Cricut Maker Black Friday Deals: Unlock Exclusive Discounts Now!
Hacker page by cricut design space
Are you also wondering why Cricut Maker Black Friday deals are so early? Well, for your information, capitalism doesn’t simply follow calendar dates. Hence, everyone wants to grab the best offers to buy their desirable products. Personally,...

Recording transmissions from the remote
Log from Automation - 434MHz Arlec power switches
== On switch one == Decimal: 1786417050 (32Bit) Binary: 01101010011110101000111110011010 Tri-State: not applicable PulseLength: 263 microseconds Protocol: 1 Raw data: 8152,744,256,744,252,744,252,264,208,1280,48,464,60,1420,72,440,368,1020,332,1744,268,732,264,732,264,248,748,736,256,256,744,736,264,248,752,244,752,248,740,768,12,736,12,740,256,740,256,740,256,748,248,264,736,260,740,740,256,744,252,260,736,740,260,256,736,...