Category Archives: adc

RTFM: ADCs and DACs

It’s tough to find a project these days that doesn’t use an analog-to-digital converter (ADC) or digital-to-analog converter (DAC) for something. Whether these converters come as built-in peripherals on a microcontroller, or as separate devices connected over SPI, I2C, or parallel buses, all these converters share some common attributes, …read more

Continue reading

Posted in adc, analog, calibration, converter, dac, digital, DNL, Engineering, Hackaday Columns, INL, Original Art | Leave a comment

A Hard Rocking Arduino Visualization Shield

Over the summer [ElectroSmash] put the finishing touches on the Arduino Audio Meter, a shield for the Arduino Uno that visualizes various aspects of an incoming audio signal on a set of four 8×8 LED dot matrices. Obsentisibly it’s for use on a guitar pedalboard, but thanks to the incredible …read more

Continue reading

Posted in adc, Arduino Hacks, audio meter, guitar pedal, led matrix, MCP6002, musical hacks | Leave a comment

Your Arduino SAMD21 ADC is Lying to You

One of the great things about the Arduino environment is that it covers a wide variety of hardware with a common interface. Importantly, this isn’t just about language, but also about abstracting away the gory details of the underlying silicon. The problem is, of course, that someone has to decode …read more

Continue reading

Posted in adc, analogRead(), arduino, Arduino Hacks, news, SAMD21 | Leave a comment

Rebuilding The First Vocal Encryption System

Back in the early days of radio, it was quickly apparent that the technology would revolutionize warfare, but only if some way could be found to prevent enemies from hearing what was said. During World War II, the Allies put a considerable amount of effort into securing vocal transmissions, resulting in a system called SIGSALY – 50 tons of gear developed by Bell Laboratories with the help of Alan Turing that successfully secured communications between the likes of Churchill and Roosevelt during the war.

Now, a small piece of the SIGSALY system lives again, in the form of a period-faithful …read more

Continue reading

Posted in adc, classic hacks, crypto, encryption, quantizer, SIGSALY, thyratron, vacuum tube, vocoder | Leave a comment

Brushless Motor Thrust Stand Provides Useful Data

When designing model aircraft of any shape or size, it’s useful to know the performance you can expect from the components chosen. For motors and propellers, this can be difficult. It’s always best to test them in combination. However, with the numbers of propeller and motor combinations possible, such data can be tough to come by. [Nikus] decided it would be easier to just do the testing in-house, and built a rig to do so.

The key component in this build is the strain gauge, which comes already laced up with an Arduino-compatible analog-digital converter module. Sourced for under $10 …read more

Continue reading

Posted in adc, brushless motor, motor, static test, static testing, strain gauge, transportation hacks | Leave a comment