Thursday, February 1, 2018

DMM or Digital Multimeter

A nice DMM is the first thing you should own. Have one for High Voltage and High Energy and another for Workbench Testing.

Better to use external attenuators and shunts when high energy is involved. Make yourself and your instruments last for some time. Safety is first. Footwear and Gloves can help.

DMM or Digital Multimeter

A DMM with Rotary Switch, like the one above is popular. The Switches do give trouble after a few years. Better go for a Auto Ranging type. Ensure cables are not frayed or near hot objects.

A Lab Workbench DMM can be larger and with a higher resolution and Better accuracy. Resolution is the number of digits or decimal positions. like 2.348 is higher resolution than 2.3

Accuracy means how correct the reading is to a Relative Standard in the Workplace or an Absolute Reference in the Standards Lab.  1.034 Reading on your DMM for a Reference Source of 1.000 is pretty inaccurate. Send it to the Calibration Lab once a Year.

Monday, January 1, 2018

Theremin an electronic musical instrument

The theremin is an electronic musical instrument controlled without physical contact by the thereminist. It is named after the Westernized name of its Soviet inventor, Léon Theremin.

Carolina Eyck gives you an overview about the things you need to know when you are composing for the theremin!

Monday, December 4, 2017

Blue Raspberry only for Brazil

The blue colouring of the Raspberry Pi 3 sold in Brazil is the only difference between it and the standard green model.

Brazilian Raspberry Pi 3 - Raspberry Pi

Blue Raspberry only for Brazil

I think we need pink, maroon, orange and yellow Raspberry as well. Call it the Butterfly program.

Thursday, November 9, 2017

The Signal Path Videos

The Signal Path blog provides a rich depth and breadth of electrical engineering topics and experiments. Equipment reviews and repairs are always accompanied with research and industry relevant experiments and tutorials.

The aim of The Signal Path is an electrical engineering video blog for industry professionals, students and hobbyists.

In this episode Shahriar performs a full review on the Tektronix MDO4000C series mixed domain oscilloscope, particularly model MDO4104C-6. The MDO4000C combines up to six instruments including a function generator and a built-in spectrum analyzer.

Unlike any other instrument, it can synchronize RF, analog and digital channels. These correlated measurements provide insight into difficult to find problems particularly intermittent events.

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