tutorial Archives - Page 4 of 25

C# Code Snippets Unsfe code Pointers Stackalloc and Spans

C# Unsafe code, Pointers, Stackalloc and Spans

TslaJanuary 15, 2024September 4, 20240

In this code snippet, we will take a look at unsafe code, pointers, stack allocation and spans in C#. C# has managed memory unlike for example C/C++. This means that you don’t have to allocate or clear memory by yourself and in the case of .NET the CLR(common language runtime) takes care of memory allocation and garbage collection. This also means that in C# you can’t work with a pointer or allocate your variables on the stack which is common practice in C/C++.

C# Async Await and Tasks

TslaJanuary 14, 2024October 21, 20240

In this code snippet, we will take a look at async and await in C#.

The aysnc keyword enables a method to use the await keyword. These two keywords together enable us to execute code asynchronously. When called an async method will return a Task.

C# LINQ Basics

TslaJanuary 9, 2024January 16, 20240

In this code snippet, we will learn how to do some basic queries using LINQ(Language Integrated Query) in C#.LINQ is used to work with data within C# and can be used on enumerable types(IEnumerable or IQueryable interface) like lists, arrays, … A query can be made by using an SQL query like syntax or by method chaining. The latter is often combined with the lambda operator to specify some kind of condition as the parameter to the function/method.

18650 Battery Charge Shield UPS Modification

TslaJanuary 4, 2024March 2, 20242

In this post, I will show you how to modify the UPS so it works properly. Years ago I bought these 18650 battery charge shield boards that can be essentially used as a UPS(uninterruptible power supply). I just recently made a project that required a UPS so I finally decided to use them. This is when I found out about all the problems associated with this module.

Mini Portable Server From An Old Bitcoin Miner

TslaJanuary 2, 2024March 2, 20240

In this post, I will document the build process for my mini portable server made from an old Bitcoin miner case and an Orange Pi Zero Plus. One day I was looking through my SBCs parts bin and saw the Orange Pi Zero Plus board(still in its packaging) I had bought many years ago but never used. I got the idea to make a small portable server that could maybe run an MQTT broker, act as an AP, run a web server, etc.

Installing Tasmota On The Sonoff Smart Switch

TslaDecember 30, 2023March 2, 20240

In this post, I will show you how to flash a Sonoff Wi-Fi smart switch with the Tasmota firmware. Tasmoata is open source firmware for ESP chips. It gives you extra functionality like control via HTTP, Web UI, MQTT or serial compared to the Sonoff app. It also makes it easy to integrate with other services like Home Assistant. But most importantly it has no external dependencies and it won’t collect your data.

bmw f10 revers light assembly new bulbs 2

BMW F10 Reverse Light Bulb LED Replacement/Retrofit

TslaDecember 11, 2023March 2, 20240

Recently I replaced/retrofitted the reverse lights and back fog lights on my car. I thought I’d document the process and post it online so it can help out anyone trying to do the same.

DIY Clamp Current Meter

TslaDecember 5, 2023March 2, 20240

In this post, I will show you the contactless clamp power meter I made. I used a readily available SCT-013 current transformer clamp. The great thing about this is that you can measure the current flowing through a wire without having to put an amp meter in series with the load and source. This means you also don’t have to expose yourself to a potentially dangerous voltage.

ESP32/8266 Over The Air Updates (OTA)

TslaNovember 27, 2023March 2, 20240

In this post, I’ll show you how to do OTA(over the air updates) to your ESP32/ESP8266. This means that you don’t have to connect your ESP board to your PC by cable and can instead push firmware updates wirelessly over the network(as long as you are connected to the same network). The process of uploading the firmware remains almost the same. The only difference is you have to select a network port under Tools -> Port -> Network Ports instead of a COM port.

DIY Spot Welder

TslaNovember 21, 2023March 2, 20240

In this post, I will show the spot welder I made. A spot welder is a very useful tool that can weld two pieces of metal by simply pressing them together and passing a high current through that small point. This causes that particular spot where the metals are pressed together to heat up sufficiently to melt and fuse them together.