Qwen 3.6-27B is a state-of-the-art large language model suitable for local deployment. With technologies such as quantization, MTP, and TurboQuant, this language model can be deployed and run smoothly on an RTX 2080 Ti with 22GiB VRAM.

The following steps have been successfully tested on the latest version of CachyOS (installed using the 260426 ISO).

Installing dependencies

sudo pacman -Syu cmake cuda nodejs npm
paru -S python-modelscope

Configure npm mirror if necessary:

npm config set registry https://mirrors.cloud.tencent.com/npm/
npm config set strict-ssl false

Rebooting or relogging in is recommended for refreshing environment variables.

Mandelbrot set is one of the most famous fractal images. It can be plotted with a simple Forth program.

Representation of Fixed-Point Numbers

Fixed-point numbers in Qint.frac format are used for computation. int is the number of bits for the integer part (including the sign bit, if any), and frac is the number of bits for the fractional part. In the following program, the width of the fixed-point number is 16 bits (the same as a single-precision integer in Forth), i.e., int+frac=16.

cwt provides an Arch Linux image for the VisionFive 2 RISC-V single-board computer. In this image, U-Boot uses the mainline version, which, compared to the version provided by StarFive, cannot recognize the 16GB Optane M10 (MEMPEK1J016GAL) at boot. Here is the method to boot Arch Linux with 16GB Optane on the VisionFive 2 using the U-Boot provided by StarFive.

Preparation

Download the image ArchLinux-VF2_6.12_v6.0.0-cwt25.img.zst here，burn it to a micro SD card.

Download the SPL (u-boot-spl.bin.normal.out) and U-Boot (visionfive2_fw_payload.img) provided by StarFive here.

It is often necessary to calibrate the shutter speed when repairing cameras. The table below provides the upper and lower limits of exposure time calculated according to the method specified in ISO 516:2019 “Camera shutters — Timing — General definition and mechanical shutter measurements”.

Excel spreadsheet can be downloaded here.

The program of the RP2040 is stored in the SPI Flash, and during runtime, the program in the Flash is randomly read into the internal cache for execution. This does not pose a problem when working in single-core mode. However, in multicore mode, if one core is executing the program while another core is writing to the Flash (for example, using the littlefs file system to manage the remaining space in the SPI Flash that does not store the program), it may cause simultaneous reading and writing of the Flash, leading to the program on one or both cores hanging.

The decibel (dB) is widely used in electronics to describe ratios. Many people find this logarithmic unit difficult to understand, but in fact, it was designed for mental calculation and should not be perceived as overly complicated.

dB is suitable for situations where the dynamic range is large but the requirement for significant digits is not high. For example, whether the exact value of ripple rejection ratio is ten thousand times (80 dB) or fifteen thousand times (83 dB) is not particularly important; it is sufficient to know that it is not one thousand times (60 dB).

The most common marking system for chip resistors is the three/four-digit marking system, where the first two/three digits are the significant figures, and the last digit is the order of magnitude (in ohms, indicating the number of zeros added after the significant figures). For resistors less than 10 Ω or 100 Ω, the decimal point is represented by the letter R. For example:

Due to the limited printable area on 0603 chip resistors (0402 and smaller packages generally have no markings), some E96 (1%) 0603 chip resistors use the two-digit plus one-letter marking method described below to save one character. This method is also known as the EIA-96 SMD Resistor Code.

Problem

Calculate

from acquired signal

Equations

From

we have

I(t) and Q(t) can be obtained by matrix inversion:

EEPROM Card and Backplane

EEPROM Card

For EEPROM cards, firmware provided on this website arranges adjacent blocks on the same EEPROM chip, with block numbers ordered according to EEPROM addresses.

The EEPROM card card uses a USB 3.0 Type-A interface, where the power contacts are compatible with standard USB interfaces, and the signal contacts are used for I2C interface and addressing:

SOCKET connects to EEPROM address line A1：

Working at 20MHz and 22.1184MHz

Tests have shown that My4TH can operate stably at 20MHz (using the 10MHz ROM image file provided by the original author at baud rate 9600) by increasing Vcc to 5.2V with 74HC series logic circuits and AM27H256-45/35DC.

This configuation can work at 22.1184MHz with Vcc=5.4V:

Higher baud rate

By adjusting the delays in serial subroutines, the system can operate at 14400 baud above 16MHz and 19200 at 22.1184MHz.