Electronics-Lab.com Blog

“miceuz” have set up this little experiment to gain a better understanding how does a SAR analog to digital converter work. Go to http://wemakethings.net/2013/02/25/how-does-adc-work/… for more info and Arduino code.

How does an ADC work? - [Link]

What’s inside the JBC CD-2BB soldering station - [Link]

Jessica MacNeil writes:

On May 17, 1902, a Greek archeologist noticed precision gear wheels embedded in an ancient artifact of corroded bronze and wood. The device would come to be known as the Antikythera mechanism, the oldest known complex scientific instrument.

Discovered in 1900 on the wreck of an ancient Roman merchant vessel near the island of Antikythera, the 2000-year-old device was designed to calculate astronomical positions, predict eclipses, and calculate the timing of the ancient Olympics. It is now regarded as the world’s first mechanical computer.

Gears are discovered on the Antikythera mechanism, May 17, 1902 - [Link]

To reach a maximum mechanical stability, many Sonitron piezo components are now available even with a foam tape. 

Sonitron piezo components feature a high reliability, resistance to harsh conditions and also to vibrations. Despite these features, usually one of the weakest points (as for the vibration-resistance) is the joint of leads with a PCB.

That´s why company Sonitron offers a simple but very efficient solution also improving their assembly. This solution is based on a glued both-sided foam tape, shaped exactly according to dimensions of a given component. Sonitron mars this option as an  „FP“ – Foam Patch and is available at SMA(T), SMB, SCS and SMAC series. Upon order we´re able to provide you any component listed in the list of types available with this option. Price difference in comparison to a standard version is approx. 0.20-0.45 Eur depending on a size of a given component.
In case of interest, please contact us at info@soselectronic.com.

Let vibrate only a membrane - [Link]

manekinen @ mdiy.pl builds a simple symmetrical power supply based on LM317 and LM337. Design is Eagle and includes PCB so you can build it your own.

This time, simple project that i made from simple need. Simple, cheap and functional regulated power supply 1,25V to 15V, two separately regulated positive lines and two negative. This power supply uses LM317 and LM337 integrated circuit stabilizers – or their stronger versions. Galvanically separated lines can be connected in various configurations.

1.25V to 15V Simple Dual Symmetrical Power Supply - [Link]

Here is a simple and reliable 2.5W Stereo Audio Amplifier based on TEA2025 IC. Nydal Dahl writes:

I have been looking for a good stereo amplifier circuit diagram for a long time. I am not a HiFi geek, I just wanted to build a simple stereo amplifier that could drive some speakers for my desktop computer.All the schematic diagrams that I could find seemed to involve lots of hard-to-find components or you had to use it together with a pre-amplifier or some other amplifier stage. It was always something that made me hesitate.

TEA2025 – 2.5W Audio Stereo Amplifier - [Link]

How to generate high voltage DC with a Cockcroft-Walton Multiplier circuit. a.k.a Cockcroft-Walton / Villard / Greinacher Cascade

EEVblog #469 – Cockcroft-Walton Multiplier - [Link]

by Steven Keeping:

Traditionally, switching DC/DC converters (voltage regulators) were controlled using analog techniques because these were simple to implement and helped to maximize the power supply’s efficiency. Digital components were too slow and power greedy to challenge analog dominance.

However, over the past several years the introduction of high-speed, low power consumption and inexpensive silicon has rekindled interest in “digital power management.”

Armed with these new chips, designers are keen to take advantage of features such as the ease with which digital control enables optimization of the power supply by adaptation of a closed-loop response – even allowing adjustment “on the fly” to suit changes in the operating environment or to compensate for factors such as capacitive loading and component aging.

This article considers the benefits that digital power brings to voltage regulators by comparing an analog power supply with its digital equivalent. The article then continues by describing some of the latest digital regulators released by major vendors that take advantage of the control techniques discussed.

The Rise of Digital Control for DC/DC Regulation - [Link]

This is an 125 kHz RFID reader that is based on ATtiny13 micro-controller and an LM358 Operational Amplifier. No special RFID chip is used. The reading, decoding and printing the unique ID from 125 kHz RFID tags is made entirely in software by ATtiny13.

125 kHz RFID reader based on ATtiny13 - [Link]

The RFID (Radio frequency identification) technology steps-up in the modern age in the field of access system, identification, protection system and so many places. In this project, we are using this as an door opening as well as door closing system based on the RFID card number identification. [via contact form]

RFID Based Door Opening System - [Link]