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Posts Tagged ‘analog’

Fun with Analog multipliers: Squares, cubes, and VCAs

Tuesday, July 5th, 2016

[embed]http://www.youtube.com/watch?v=m6MqNZ7H99w[/embed] Craig writes, "Need a frequency doubler? Want to plot a cubic function on your ‘scope? How about a square root extractor, or a voltage controlled amplifier? Analog multipliers make all this (and more) a snap!" Details at Analog Zoo homepage.

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Teardown, repair & calibration of a Valhalla 2701C Programmable Precision DC voltage standard

Thursday, January 21st, 2016

A teardown and repair of a Valhalla 2701C Programmable Precision DC voltage standard from The Signal Path: In this episode Shahriar examines a faulty Valhalla 2701C Programmable Precision DC Reference instrument. Valhalla Scientific’s 2701C Programmable Precision DC Voltage Calibrator delivers ultra-precision, ultra-stable DC voltage from 100 nanovolts to 1200 volts. This unit...

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Single OpAmp window comparators

Thursday, December 31st, 2015

In this video Craig shows how to build a window comparator with a single Op-Amp: A recent question on the Electrical Engineering Stack Exchange site got me thinking about some interesting window comparator circuits. Here’s how to detect three different input voltage levels with just one op-amp! More info at Analog...

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Go analog with a resistance-based calculator

Monday, August 18th, 2014

tanishqjain340 wrote this instructable detailing the build of his analog calculator project: Do simple calculations with your math box. The next time you need to crunch a couple of numbers, resist the urge to grab a digital calculator. Instead, round up some variable resistors, also known as potentiometers, and wire them into an...

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Posted in DIY | 2 Comments »

DIY vacuum tube amplifier

Wednesday, July 30th, 2014

Ethan of Protofusion designed and built a stereo vacuum tube amplifier based off of the TubeLab SimpleSE design.  

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Color organ – LED light show

Wednesday, January 16th, 2013

[embed]http://www.youtube.com/watch?v=cgk3o8s_N1E&feature=player_embedded[/embed] Want a simple light show in your room? Here's an Instructable on how to build your own. The Color organ is all analog and built from only transistors, resistors, capacitors, and of course LEDs: Audio source can be any "line level" output from audio equipment, or headphone output from...

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Posted in project logs | 1 Comment »

DIY Audio function generator

Friday, May 4th, 2012

DIY Audio function generator  is a low-distortion function generator which operates in the Audio frequency range. Conventional function generators use a square wave signal to generate the other waveforms like triangle, or sine wave. This approach adds noise to the sine wave output, which is the one waveform Eric wants...

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Posted in project logs | 1 Comment »

How to read several infrared sensors using one MCU pin

Sunday, January 22nd, 2012

Oscar has written an article describing a technique he's used for reading multiple analog sensors with one MCU ADC pin. He was designing a line-following robot and wanted to read several infrared sensors without having to dedicate an analog read pin for each. His solution uses "a Schmitt trigger inverter...

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Posted in how-to, Interface, robotics, sensors, techniques | 5 Comments »

TI analog design contest

Friday, January 13th, 2012

For all our European readers who lament contests limited to USA residents only, here's one for you. TI is hosting the Analog Design Contest (ADC) and its limited to entrants in the EU and other specified nations (not including the Americas). Its purpose is to encourage system-level design within Universities...

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Posted in contest | 1 Comment »

USB Analog/digital logger

Tuesday, December 13th, 2011

Arhi started started working on a USB/UART analog and digital logger: It's a simple USB logger that can log 12 analog and 3 digital channels + data from MAX6675 (thermocouple driver). It sends the data via usb or uart. We think this is a very useful device that has a...

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Posted in project logs | 1 Comment »

Dangerous DSO part 2: Feed and water your ADC

Tuesday, May 10th, 2011

Dangerous DSO is a new logic analyzer/oscilloscope design we've been using in the lab. This is not a finished project, it will not be produced. We're posting our current progress to get some feedback. Look for a new Dangerous DSO article every day this week. Be sure to see Part1:...

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Posted in FPGA, oscilloscope, Prototypes | 4 Comments »

App note: Load-power monitor improves high-side current measurements

Saturday, April 2nd, 2011

This amplifier with an analog voltage multiplier could be useful in a bench power supply: Combining a high-side current-sense amplifier with an analog voltage multiplier, the MAX4211 can easily measure the power dissipated in a load. One multiplier input connects to the load voltage, and the other to an internal...

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Bus Pirate: MAX147 ADC SPI demo

Wednesday, May 19th, 2010

The MAX147 is a 12bit 8 channel analog to digital converter. will_j plans to interface a MAX147 to the web platform, but he used the Bus Pirate and the PirateShip GUI to learn about the chip first. There's a screenshot of the terminal output in the forum. The Bus Pirate...

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Posted in Bus Pirate, Chips | No Comments »

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