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Week 3 part 2 - testing
Log from 25in24 Electronics Project Board
Well, initial testing was more difficult than expected - took about five hours just to get a couple of basic circuits working. Made a number of incorrect assumptions / mistakes including:Assuming it might be differences between components (germanium...

Rev1 Preliminary Accuracy and Precision Test
Log from Multimeter
As the title says, this is a preliminary test of the first version of the multimeter. Before the test, I basically calibrated it using my Fluke 101 as a reference. The results of the test are as follows: 2.5V Error: 0.569, Coeff of Var: 0.0102 5V Error:...

Frankenscope
Log from Low-Cost Microscope Boom
There's not much to this build: Mount the monitor arms to your bench. Follow the manufacturer's instructions, or wing it like I did. I figured out where I wanted the scope to end up when in use and marked the location on my bench. Used a 1.5" hole...

Prerequisites and software
Log from VGA videocard for microcontrollers
Sometimes, when making your own devices on microcontrollers, there is a need to display huge amounts of information on a display and to use a bigger screen for ease of perception. Unfortunately, there are no ready-made and budget-friendly solutions for...

From prototype to product creation
Log from VGA videocard for microcontrollers
First of all, you should pay attention to the ROM used. The flash-ROM chip from an old computer motherboard has a finicky parallel interface where the address is written in two runs. This complicates the operating logic and increases access time. Additionally,...

Step 2: Firmware about sensor
Log from Weather Station With A7670 -- Remote Monitoring
At first, we need to prepare the environment for ESP32 development board programming in arduino, and you can cheak this guide.This is a library for our Monochrome OLEDs based on SSD1306 drivers. #include This library allows you to communicate with...

Schematic
Log from "Perpetual" Wristwatch
It's have simple schematic, for save pins I used Charlieplexing(35 components in total): https://en.wikipedia.org/wiki/CharlieplexingIn this project i use for charging 12 light sensor BPW34S, on clear sun one cell make 0.5-0.6 V and ~2 mA, connect its...

Hardware and libs
Log from TinyML meets dog training
For my first trials I decided to use the TinyML kit: which contains Arduino Nano 33 BLE Sense and the OV7675 camera (kit). I use the following libraries on arduino IDE:Arduino Mbed OS Nano Boards v3.0.1Arduino_OV767X v0.0.2Arduino_TensorFlowLite (from...

What is an egg?
Log from Wobble
Starting project by learning more about eggs.. I'd like to figure out how to create a nice 3D printed egg shape that can hold a circuit board, battery, and motor assembly. I'll start by printing off some free variants from thingiverse. Ultimately I want...

Development boards and wobbling madness!
Log from Wobble
I started writing some programs to control the DRV8825 using a few small embedded boards I had lying around - the Metro by Adafruit and Arduino Uno both of which are based on the ATMEGA328P processor. I went with these because I wanted something...

1080 LEDs in the Palm of Your Hand!
Log from MiniSphere
We're starting to finalize some of the bigger pieces of this project, so we're excited to start sharing our progress! We've got the geometry and LED arrangement set, now we're testing our electrical design and getting started on writing some animations....

Hello world
Log from Workshop Automation
Obligatory title. This project has already been underway for months and will likely continue to evolve for as long as I can. Since my workshop is in my basement with no windows, I wanted a way to keep an eye on the outside world. I don't...

Step 2: ThingSpeak
Log from LoRa->4G Gateway_Soil monitoring with Cloud Server
ThingSpeak Is The Open IoT Platform With MATLAB Analytics. Register and log in to your account Define the parameter you want on the Channel page and save it. On the API keys page, you can find the API key used to write the data, and you can see...

Step 3: Firmware
Log from LoRa->4G Gateway_Soil monitoring with Cloud Server
First, we need to prepare the environment for ESP32 development board programming in Arduino, and you can check this guide.RadioLib library is a wireless communication library. It supports a variety of wireless communication modules, including LoRa,...

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