Author Archive

Friday Fun: Fart sounds

Flatulence humor (more commonly known as fart jokes) is a form of toilet humor that refers to flatulence. The funniness of farts is associated with uncontrollable physicality. fart.js is a tool to add the fart sound on earth to your pages (supports Chrome, Firefox, Opera, Safari, IE). You can find fart piano on-line at https://www.burpandfartpiano.com/

Bad LED dimmer

https://www.facebook.com/share/r/1MqEUa6oyN/ A bad design that for most control range LEDs are off, then there is some brightness control and then turn a little bit more and you have your LEDs fried. Trying to control LED brightness without series resistor by adjusting voltage going to then is a bad design. The LM317 should have been configured

ANENG B16 Induction Tester Pen

A non-contact voltage tester (NCVT) is a handheld electrical tool used to quickly and safely detect the presence of AC voltage in wires, outlets, switches, and electrical devices—without touching any bare conductor. It uses capacitive coupling: when you bring the tip close to a live conductor, the tester senses the electric field generated by AC

Linux is 34 years old

Yesterday marked 34 years since Linus Torvalds, then a young computer science student, announced in the comp.os.minix newsgroup that he was working on a new operating system — “just a hobby, nothing big or professional like GNU,” as he put it. In hindsight, one of the most ironic understatements in tech history. The first Linux

Bad SSR circuit

I saw this bad circuit posted to Facebook: It at quick glance looks like a FET based solid state relay (SSR) design to control 230V AC. But actually it is not suitable for the application at all. If you connect the circuit like shown, it will not work as planned and many components will be

Digital audio mixer history

In today’s world of audio production—whether for music, podcasts, broadcasting, or live performances—digital audio mixers are the heart of the operation. These powerful tools allow sound engineers to balance, blend, and shape multiple audio signals. Analog mixers offer raw simplicity and tactile immediacy. Compared to them digital mixers provide versatility, automation, and a boatload of