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April 13, 2023 by David Such Leave a Comment

Reefwing LSM9DS1 Library for the Nano 33 BLE Sense

This article explains how to write a C++ library to control and monitor the LSM9DS1 IMU sensor using an Arduino. If you want to really understand how a sensor operates, then write a library for it. It will take longer than you think, but the effort is worthwhile. This library can be downloaded using the Arduino IDE Library Manager or directly from our GitHub repository.

Read the rest of the article on Medium…

Filed Under: App Development, Drones, IoT Tagged With: Arduino, IMU, LIbrary, LSM9DS1, Nano33BLE

April 13, 2023 by David Such Leave a Comment

ChatGPT — As a Programming Tool

Although ChatGPT is unlikely to be replacing programmers anytime soon, it can be a useful coding assistant. In this article, we will investigate how you can use ChatGPT (GPT-3.5) as a programming tool, and compare it to the earlier model found in the Open AI Playground (GPT-3). For simplicity, we will use mostly Python in our examples. Despite its limitations, ChatGPT is seriously impressive.

Read more at Medium…

Filed Under: AI, App Development Tagged With: AI, app, ChatGPT, development

March 19, 2023 by David Such Leave a Comment

ChatGPT — Search Accuracy, Hallucinations, and Prompt Engineering

We love the progress that is being made in Machine Learning (ML) and predictive Large Language Models (LLMs), but believe users need to be cautious in their application and aware of the pitfalls. LLMs are being spruiked as a replacement for search engines (*cough* Microsoft *cough*), but until they stop hallucinating and making up facts, caution is warranted. #chatgpt #promptengineering #aihallucinations

Search Accuracy, Hallucinations, and Prompt Engineering https://link.medium.com/whhkf4Ruhyb

Filed Under: AI

November 19, 2022 by David Such Leave a Comment

An Arduino Nano Electronic Speed Controller (ESC) — Part 3

In Part 1 we introduced our Arduino based ESC and followed this in Part 2 with an explanation of the power stage and MOSFET drivers. Part 3 focusses on the bootstrap capacitor which is part of the driver circuit used to turn the high-side MOSFET hard on. #arduino #bldcmotor #esc #bootstrapcapacitor #IR2110

https://reefwing.medium.com/an-arduino-nano-electronic-speed-controller-esc-part-3-e17392bd2887

Filed Under: App Development, Drones, Embedded, Marketing

November 16, 2022 by David Such Leave a Comment

OLED Displays are slow!

We have been prototyping an Arduino based Electronic Speed Controller and planned to include a 0.96″ OLED display. Tests on an Arduino UNO, clocked at 16 MHz, have shown that this display could best be described as sluggish! Even using SPI, printing out 3 lines of text results in a loop cycle time of 15 Hz. Quelle horreur! This prompted us to investigate further to understand the bottlenecks, SPI vs I2C speed, and whether there were any work arounds. #arduino #oled #SSD1306 #DFR0650 #SPIvsI2C

https://reefwing.medium.com/oled-displays-are-slow-2f422840d735

Filed Under: App Development, Drones, Embedded, Robotics

November 14, 2022 by David Such Leave a Comment

An Arduino Nano Electronic Speed Controller (ESC) — Part 2

Part 2 focuses on the power stage (AKA 3-phase bridge) and why MOSFET drivers are needed.

This series of articles was sponsored by PCBWay. #arduino #shield #ESC #bldcmotor #pcbway

https://medium.com/@reefwing/an-arduino-nano-electronic-speed-controller-esc-part-2-2bb5ec7c309a

Filed Under: Drones, Embedded, Robotics

November 10, 2022 by David Such Leave a Comment

How to Design an Arduino Electronic Speed Controller (ESC)

Having delved into how BLDC motors operate and provided an overview of trapezoidal sensorless control, we can bring it all together in the design of an Arduino ESC shield. This turned out to be much harder than we expected – now we know why no-one does it!

This series of articles was sponsored by PCBWay.

#arduino #shield #ESC #bldcmotor

https://reefwing.medium.com/an-arduino-nano-electronic-speed-controller-esc-part-1-4f65076fb2e4

Filed Under: Drones, Embedded, Robotics

September 21, 2022 by David Such Leave a Comment

Create a Custom Part in EasyEDA

As part of creating the new Sumobot motor controller PCB I had to create a custom part which wasn’t already in the EasyEDA library. The part is a momentary switch from Jaycar. The process is pretty straight forward, design the schematic symbol, design the PCB footprint and then link the two. Should you ever need to do it – here is how! https://reefwing.medium.com/creating-a-custom-easyeda-part-c02abdd85653

Filed Under: Robotics

September 9, 2022 by David Such Leave a Comment

How to Write your own Flight Controller Software — Part 11

Controlling brushless DC (BLDC) motors is a lot harder than brushed, particularly if they don’t include a sensor for rotor position. This is why Electronic Speed Controllers (ESC’s) exist. In Part 11 of our series we demistify BLDC motors and their control.

https://reefwing.medium.com/how-to-write-your-own-flight-controller-software-part-11-dee7feef05f2

Filed Under: Drones, Embedded

August 18, 2022 by David Such Leave a Comment

Age Prediction API based on First Name

I just came across an interesting API that your app can use to predict a persons age based on their first name. The API is free for up to 1000 names/day. It is called agify.io (https://agify.io/). #development

You can try it out in your browser – just insert your first name instead of “david”:

https://api.agify.io?name=david

Filed Under: Uncategorized Tagged With: app, development

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Creating Minesweeper using BeeWare, Python, and Pygame

April 9, 2024 By David Such Leave a Comment

How to create a cross-platform clone of the 90’s classic game Minesweeper, using the briefcase/pygame/python tech stack. #beeware #pygame #python #minesweeper https://reefwing.medium.com/creating-minesweeper-using-beeware-python-and-pygame-e8dae29cf02d

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