25 Results for "Q%20%EC%95%88%EC%82%B0%EB%B8%94%EB%9E%99%EC%9E%AD%20CDDC7_C%D0%9EM%20%E2%97%86%EB%B3%B4%EB%84%88%EC%8A%A4%EB%B2%88%ED%98%B8%20B77%E2%97%86%EC%88%98%EC%9B%90%EC%9E%A5%EC%95%88%20%ED%94%84%EB%A1%9C%ED%86%A0%20%EA%B5%AC%EB%A7%A4%E0%B9%8F%ED%86%A0%ED%86%A0%ED%95%AB%ED%94%BD%E2%8F%AC%EC%98%A8%EB%9D%BC%EC%9D%B8%ED%99%A9%EA%B8%88%EC%84%B1%E0%BC%88FX%EB%A7%A4%EB%A7%A4%E2%8B%8D%EC%95%88%EC%82%B0%EB%B8%94%EB%9E%99%EC%9E%AD%EC%95%A0%EC%9A%A9%20thorough/"
I made a cardboard cutout of a 20"x20" square. I then printed my letter matrix to scale (6 sheets of 8.5" x 11"), combined with tape, and trimmed to fit. I then drilled a hole at each letter in the matrix (256) in a rough location. The hole is sized...
Theory Channel capacity Shannon-Hartley law: where C is channel capacity [bps], B is bandwidth [Hz] and S/N is signal/noise ratio. Example: dPMR (C = 4800bps, B=6250Hz). So S/N must be at least 0.70. Number of bits/symbol needed Nyquist's Theorem...
Calibration1. #define CALIBRATION in software and recompile and flash ATtiny8612. For each range make two measurements in order to calculate the line v=k*ADC + m. With this simple approach I get about 10-20mV and 10-20mA accuracy ( compared...
The Audio InterfaceConnecting the microprocessor (uP) to an 8 ohm speaker and to an 8 ohm speaker used as a microphone is tricky. Tricky if you want it clean (no PWM in the out put) and simple (i.e. low part count and garden variety components).Op AmpsThe...
This log contains the details of the mechanical stuff -- the dimensions and materials. I will attempt to generate a concise description of how to build the seismometer in the Instructions section. I believe these drawings are accurate. Sorry for the...
The new r5B12 PCBs arrived from ITEAD few days ago and I managed to assemble them to test if new added features are working as expected. All boards are now a little bit larger and I tried to keep the same mounting holes spacing as in previous builds.AUX...
So Atomstack has finally released there 40 watt quad diode laser as part of the X20 Pro kit. This has a 400x400 mm working volume, built in air assist that can hit 15 psi, an offline controller with LCD screen, and of course full support for LightBurn,...
Begin with 200ml filtered water from the fridge tap, carried in an empty coffee pot. Using 4-6 ratio to calculate. 10x20 = 200ml H2O 4 grams sodium hydroxide x20 = 80 grams NaOH 6 grams silica x20 = 120 grams Unfortunately we only have 92.8 grams of...
So it was time to upgrade my smoke filter. Previously I had just taped a 20"x20"x1" merv13 filter to a $20 box fan. That was working ok but I wanted to see if I could make it perform better. From my last post I worked out...
There are many monochrome OLED display modules available for really reasonable prices out there. They can be really useful for a small and simple display in a project. However, many libraries available for driving them are rather big and slow. In this...
Living in the desert we are constantly struggling with dust and dirt. The air is so dry that the dust floats uninterrupted for days. Plus we have these amazing seasonal dust storms comically called haboobs that seem to blanket everything...
After finding a repository with software utilities for this chip, I tried to use the MPTool, which after first inspections seems to provide flash read, erase and write functionalities. When clicking the Detect button it lists all available COM ports...
My initial stab at cutting produced more smoke than it should have and was leaving a lot of smoke marks on my cuts, along with stinking up the place. So I decided to put some effort into cleaning things up. I had been cutting straight on my particle...
Prelude: I started with this project about 3 years ago. This summer, 2023, it will be finished (hopefully). This is the third take (V1 and V2 using an arduino and a generic relay module). With the arduino approach I had the problem, that somehow...