Tag Archive: analog design

Ultrasonic Cleaner Reverse-Engineering (Codyson CD-7810)

My Ultrasonic Cleaner that served me well for a couple of years, suddenly decided to quietly leave this world… And so I reverse-engineered it’s schematic!

USB Audio Multiplexer

On my desktop PC I have a speakers and a headphones. Usually I use headphones, but when I need to switch to speakers I need to physically plug in speakers instead of headphones to my PC’s soundcard. I wanted to solve this problem for a long time, but never get around of that until recently …

Continue reading »

PWM Generator Project (part1)

Very often when designing some stuff I need a square wave signal generator with variable pulse width and frequency to control power MOSFETS. You can use such a tool when designing DC-DC converter or switch-mode power supply, you can use it to emulate PWM from microcontroller when developing some new embedded design, or maybe you …

Continue reading »

Break-Beam Sensor

About one month ago I had a request to write about break-beam sensors. So, here it is! Well, basically break beam sensor consists of two parts: transmitter and receiver. Transmitter emits light (it could be, for example, an LED or a laser) and that light goes to receiver. If that light beam between transmitter and …

Continue reading »

Samson C01U USB Microphone Teardown

One of the best ways to learn electronics is to see how someone else, more experienced designed something. Whether you’ll disassemble some device or will see some schematic or design – it gives you invaluable experience. In many cases you don’t need to reinvent the wheel, just use already known design cliche and only if …

Continue reading »