Electronics Design

VGA signal generator repair

I bought this VGA signal generator module years ago from some web shop in China. It is designed to easily test your VGA monitor(s) (VGA/SVGA/XGA) with this handy tool. It can be also used as a general purpose video signal source when testing other video equipment that take in VGA signal (like video switchers, converters,

Very Many Fake DS18B20 Sensors

Chris Petrich Warns “Almost All” DS18B20 Sensors Not Bought From Authorized Distributors Are Fake https://www.hackster.io/news/chris-petrich-warns-almost-all-ds18b20-sensors-not-bought-from-authorized-distributors-are-fake-afcc0a8befc5 A test purchase of 1,000 sensors from 70 different sellers showed the majority to be counterfeits of extremely variable performance.

RGB lights for audio connectors

When gamer kids generation really hits audio engineering there will be huge market for this kind of RGB light gadgets? Neutrik etherCON® and XLR Halo Connectors are chassis connectors that incorporate a halo light ring and assymmetric ESD safe push tab. This design allow for standard XLR connector cutouts in the chassis without the need

Tektronix TDS 220 Oscilloscope

The Tektronix TDS220 is a portable two-channel digital scope with 1 GS/s sampling rate and 100 MHz bandwidth. This is part of TDS200 oscilloscope series, that was released in 1997. Sister models include TDS210 (60 MHz dual-channel) and TDS224 (100 MHz quad-channel). Tektronix TDS 210 and TDS 220 Digital Real-Time oscilloscopes offered at them time

HP 54645D 100-MHz Mixed Signal Oscilloscope

I got an old HP mixed signal oscilloscope HP54645D. This is over 20 years old test instrument with 7″ CRT display. The 54645D is a 100 MHz, 2+16 channel Mixed Signal Oscilloscope from Agilent. Measure voltage or current signals over time in an electronic circuit or component to display amplitude, frequency, rise time, etc. Applications

Oscilloscope History and Milestones

Oscilloscope History and Milestones http://www.oscopes.info/background/2265-oscilloscope-milestones Oscilloscopes have been invented in the 1920s. Up to now this instrument encountered many innovations. Today the main players are Keysight, Tektronix and Teledyne LeCroy. Read more at: http://www.oscopes.info/background/2265-oscilloscope-milestones

Tektronix 2235 oscilloscope

The Tektronix 2235 is a 100 MHz dual-trace, dual-timebase portable scope. Tektronix 2235 has two channels and delayed sweep. This is still a pretty decent analogue oscilloscope (if you are looking for an analogue oscilloscope) with Large, Bright CRT screen. This oscilloscope has the U shaped handle that has detents which allow it to double

Transistor on its 75 Birthday

The transistor, the component that created a revolution in modern, miniaturized electronics, turns 75 this week. The first transistor, developed by Walter Brattain and John Bardeen, consisted of the semiconductor germanium, gold, a crude spring and a metal base. See More: A Look Back at the Transistor on its 75 Birthday https://blog.adafruit.com/2022/12/14/a-look-back-at-the-transistor-on-its-75-birthday/

Star-quad cable

Star quad cable is a type of balanced audio cable that specializes in reducing electromagnetic interference. Quad cable is better at rejecting external noise than an equivalent single pair cable. Star-quad cable is a four-conductor cable that has a special quadrupole geometry which provides magnetic immunity when used in a balanced line. Four conductors are

Speaker DC protection

DC signals also affect the movement of the speaker cone which may result in a reduction of audio quality, although low level DC doesn’t damage the speaker. If you were to apply more than a little DC power to speakers, this will cause the voice coil to heat up significantly, which would likely cause damage.