Erich Styger writes, “This tutorial is about how to use the NXP MCUXpresso Clock configuration and configure the board to the maximum clock frequency of 120 MHz. The same steps apply to many other boards, including the FRDM-K22F one. The tinyK22 has the K22FN512 ARM Cortex-M4F on it which runs up to 120 MHz. It […]
Rui Santos posted detailed instructions of how to build an ESP32 LoRa sensor monitoring with web server: In this project, you’ll build a sensor monitoring system using a TTGO LoRa32 SX1276 OLED board that sends temperature, humidity and pressure readings via LoRa radio to an ESP32 LoRa receiver. The receiver displays the latest sensor readings […]
Adam Bender posted detailed instructions of how to design and build a custom DIY lithium battery pack with 18650 cells: Designing a custom lithium battery pack is a fun way to learn about electricity and engineering. Lithium batteries can be used for countless applications including electric bikes, scooters, vehicles, backup power suppliers, off the grid […]
A detailed instructions of how to build an ESP8266 Web Server using NodeMCU firmware: This tutorial is a step-by-step guide that shows how to build a standalone ESP8266 Web Server that controls two outputs (two LEDs). This ESP8266 NodeMCU Web Server is mobile responsive and it can be accessed with any device with a browser in […]
Dejan over at HowToMechatronics.com shared detailed tutorial on how to control brushless motor using Arduino and ESC. Check out the video after the break.
A how-to on building an asynchronous ESP32 web server with the DHT11 or DHT22 that displays temperature and humidity using Arduino IDE. More details on Random Nerd Tutorials. Check out the video after the break.
Albert posted a detailed how-to on building DIY ESP-12F based USB-5V switcher: 5V powered 100LED circuit was consuming around ~1.8Watts(though 5.1Ohm series resistor was really hot) and the brightness of the LED’s were not bad, especially difference between first led and last led brightness didnt bother me it was hardly noticeable when seen from distance. So […]
Pete Juliano, N6QW, has written an article on how to do CW on a homebrew SSB rig: The Answer is Not a Flippant: Carefully! Author’s note: A friend in VK4 land made an inquiry about CW operation. I find that 99.99% of my operating time is SSB. But others spend a greater time on the […]
Erich Styger wrote an article on how to turn a USB debug probe into a IP-based debug solution: For some projects it is not possible to have the device under debug available on my desk: the board might be in another room, on another site or in a place where physical access is not possible […]
A detailed instructions of how to build this weather station project by Open Green Energy: This Instructable is a continuation to my earlier weather station project. It was quite popular on the web, people around the globe made their own by following it and given valuable feedbacks for improvement.By taking consideration in to the comments and Q&A […]
Erich Styger has written an article on how to boot the NXP i.MX RT from Micro SD card: It is a common thing to boot a Linux system (see the Raspberry Pi) from a micro SD card. It is not that common for a microcontroller. The NXP i.MX RT ARM Cortex-M7 fills that gap between these two […]
Dejan over at HowToMechatronics posted a detailed how-to on building DIY Arduino RC transmitter: Now I can wirelessly control any Arduino project with just some small adjustments at the receiver side. This transmitter can be also used as any commercial RC transmitter for controlling RC toys, cars, drones and so on. For that purpose it […]
Erich Styger writes: Working with low power modes can be challenging. It can severely affect debugging capabilities of a microprocessor or microcontroller. I ported a FreeRTOS application using the Tickless Idle Mode to the NXP i.MX RT1064 board, and all of a sudden, the board was unresponsive to any debugger connection. Luckily the board was […]
Rui Santos over at Random Nerd Tutorials wrote a series of three posts on how to use the SerialDebug library created by João Lopes with Arduino IDE (programming Arduino, ESP32, ESP8266): After programming the ESP32 using ESP-IDF, João noticed that debug for Arduino IDE needed some improvement. So, he created the SerialDebug library to bring […]
Technovative writes, “The purpose of this article, is to show a simple method to increase the power efficiency, and functionality, of standard DC actuated electromagnetic relay switches.” Project instructables here.
A detailed tutorial on Eclipse with the EGit plugin by Erich Styger: There are things which are game changer in the world of software development: one such event was when I started using a VCS (Version Control System): it changed for me how I keep and store my projects and settings. It even changed the way how […]
Edward Mallon writes: While I loved the Nokia 5110 LCD’s readability in full sun, the pressure sensitivity was a real problem for the underwater units. So I started noodling around with some cheap OLED screens from eBay. With the exception of the init & XY functions (which are more complicated on the 1306 controller) the […]
A how-to on making a simple AM radio transmitter using the ESP32 microcontroller by Bitluni: AM Radio transmissions are based on a carrier signal which is modulated by the audio signal. It’s a very basic principle but prone to noise from the environment. Using the ESP32 it is really simple to generate an analog signal […]
Rui Santos has a great write-up on building a Multisensor Shield for ESP8266, that is available on GitHub: In this project you’ll discover how to design and create a Multisensor Shield for the ESP8266 Wemos D1 Mini board. The shield has temperature sensor (DS18B20), a PIR motion sensor, an LDR, and a terminal to connect […]
Edward Mallon writes: This is a follow-up to our post about using Nokia 5110 screens on three unused analog lines with shift-out. That saved me from messing with the hardware SPI bus which we reserve for the SD cards. A secondary benefit is that the code is really lean, on the order of about 250 […]