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Week 3 - PCBs in, soldering and assembly
Log from 25in24 Electronics Project Board
PCBs came in! Thanks JLCPCB!!Soldered up the boards - Kino in the Design Lab Laser cut a cool outline in plywood that I'm using for the base for testing.Boards were soldered and mounted. There were some clearance issues with the meter...

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:...

Rev1 Display Bodge
Log from Multimeter
To make the display work on revision 1, I bypassed the display driver and wired the pico IO pins strait to the segment LEDs. It is a little faint, as the display driver circuit worked completely differently, but it works to test the display.

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 1:hardware
Log from Weather Station With A7670 -- Remote Monitoring
Insert the SIM card into the slot on the back of the boardConnect 0.96 OLED to Maduino Zero 4G LTE(CAT1 A7670) 's SCL and SDA;Connect Temperature and humidity sensor's data pin to Maduino Zero 4G LTE(CAT1 A7670) 's D6;Connect Photosensitive...

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...

Step 3: Thingspeak
Log from Weather Station With A7670 -- Remote Monitoring
ThingSpeak Is The Open IoT Platform With MATLAB Analytics. Register and log in to your accountDefine the parameter you want in the Channel page and save itOn the API keys page you can find out the API key used to write the data, and you can see an example...

Step 4: Firmware about LTE
Log from Weather Station With A7670 -- Remote Monitoring
Using HTTP(S) AT Commands, accessing to HTTP server,SerialUSB.println("Maduino Zero 4G LTE CAT1 Test Start!"); SerialUSB.println("Wait a few minutes for 4G star"); delay(3000); sendData("AT", 1000, DEBUG); delay(5000); sendData("AT+CICCID", 1000, DEBUG);...

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...

Simple plan and next steps
Log from TinyML meets dog training
I will soon reveal what the purpose of the end product is supposed to be, however, for now the journey is the goal. I've become fascinated by machine learning and then about the idea of using it on microcontrollers only about 6 months ago, so it...

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...

basic protocol structure
Log from VEVOR diesel heater protocol
Some days ago a friend told me about the heaters from Vevor and after some search I found this page very promising: http://afterburner.mrjones.id.au/ So I hoped the Vevor ones have the same protocol structure and things would be quite easy....

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