Blog - Page 8 of 27 - The EECS Blog

DIY Portable 100W LED Torch

TslaNovember 14, 2022March 2, 20240

In this post, I’ll show the portable 100W LED torch floodlight I made. I originally bought the 100W LED and lens kit many years ago but have just recently decided I would finally make an LED flashlight out of it. A lot of the flashlights online usually don’t have a very large battery capacity and need to be recharged quite often if you use them for an extended period. The problem is a lot of those flashlights also use 16850 batteries that have to be taken out of the flashlight to be recharged with a charger. This prompted me to create my own flashlight with a large battery capacity that is also easily rechargeable without having to take out the batteries every time.

Docker Cheatsheet

TslaNovember 8, 2022November 8, 20220

This post is a cheatsheet for Docker. I wrote this for myself so if I ever have trouble remembering some of the more common commands I can just look them up on my own site. And maybe someone out there on the internet will find this useful for themselves as well.

DIY Raspberry Pi Microscope

TslaSeptember 27, 2022March 2, 20240

In this post, I’ll show you a Raspberry Pi microscope I made for soldering and inspecting PCBs. The great thing about it is that it has a long working distance. This enables the microscope to be mounted on the shelf above my workbench so it doesn’t get in the way. An additional benefit is that the image doesn’t shake if you bump the table when working.

T-SQL Cheatsheet

TslaSeptember 13, 2022October 15, 20240

This short post is a cheat sheet for transact SQL or T-SQL for Microsoft Server. I wrote this for myself so if I ever have trouble remembering some of the more common queries(as I don’t work with databases on a daily basis) I can just look them up on my own site. And maybe someone out there on the internet will find this useful for themselves as well.

Serial Port Communication With Powershell

TslaAugust 30, 2022October 18, 20220

In this short post, I’ll show you how to read and write to/from the serial port using Powershell.

measuring the length of coax with an oscilloscope setup

Measure The Length Of Coax With An Oscilloscope

TslaAugust 30, 2022June 10, 20230

In this post, I’ll show you how to measure the length or find a break in a coaxial cable with the help of your oscilloscope and waveform generator. We can do this using signal reflection that occurs when a transmission line is not terminated correctly.

Measuring Capacitors And Inductors With Your Oscilloscope

TslaAugust 29, 2022December 25, 20250

In this post, I’ll show you how to measure the value of capacitors and inductors with your oscilloscope and waveform generator. To measure the capacitor we’ll simply which will charge(periodically with a square wave) it through a resistor and measure how much time it takes the capacitor to charge to 63% we can then calculate its value according to the RC time constant formula which is t = RC. We’ll rearrange it to C = t/R to get out the capacitance.

Potential Phishing Attack Vector Through Google Analytics

TslaAugust 24, 2022August 24, 20220

Some tome ago(few years) I was using Google Analytics to check the traffic to this very site. I was looking at the “pages report” where it shows your most visited pages. I discovered that I was getting an error(This site can’t be reached) when I click the hyperlink which was supposed to take you to that particular page on your website.

Random Projects

TslaAugust 24, 2022May 17, 20260

In this post I will document some of my smaller projects that don’t deserve a whole blog post of their own.

Cheap DIY Spectrum Analyzer

TslaAugust 23, 2022March 2, 20240

In this post, I’ll show you how to make a cheap portable spectrum analyzer from a TV receiver dongle. The dongle gets sold as a TV (DVB-T) however its an SDR(software defined radio) which means that it can be used to receive pretty much any RF signal(depending on the chip used up to 1-2 GHz) and turn it into a digital one to be later processed by software.