Agilent 53152A 46GHz frequency counter teardown and repair from The Signal Path: In this episode Shahriar investigates a faulty Agilent 53152A 46GHz frequency counter. The instrument does not power on and shows no sign of internal voltage presence. Teardown of the instrument reveals a large PCB where all analog and digital circuity is contained. The power supply […]
Craig writes, “RF filter design is a piece of cake these days thanks to computer design and simulation tools. But actually realizing the simulated filter response in the real world can be a completely different matter! This video provides an introduction to practical RF filter design by building, testing, and tweaking a 137MHz bandpass filter […]
Bob writes: Back when I was deverloping the PSU burner, I wanted to have the Analog Discovery isolated from the common ground, to avoid noise and other issues. Since I did not have a way to do this, I ended up using a laptop on battery for measurements. But for long term, I needed […]
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.
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 does not have a working […]
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 Zoo site.
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 analog mathematics rig. By twisting […]
Ethan of Protofusion designed and built a stereo vacuum tube amplifier based off of the TubeLab SimpleSE design.
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 computer sound cards and iPod/MP3 players. […]
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 for his audio development. His […]
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 whose output has resistors connected […]
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 by providing the opportunity for […]
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 place on every bench top. […]
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: There’s so much between 0 […]
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 analog of the load current—that […]
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 is available at Seeed Studio […]