my recent reads..

LEAP#250 AudioDSP Library for the pedalShield UNO

When I built the pedalSHIELD UNO and a clone, I started collecting my code in an AudioDspDriver class library. I’m liking the encapsulation and reuse it provides over just hacking sketches based on the pedalSHIELD examples. So this project is an exercise in implement the equivalent of all the pedalSHIELD UNO examples. As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub hero_image


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LEAP#249 Guitar Practice Amp

This is a single-channel 10W guitar practice amplifier circuit based on the TDA2050 and was designed for the Fundamentals of Audio and Music Engineering: Part 1 Musical Sound & Electronics course offered by University of Rochester on Coursera. The amplifier itself is designed to teach simple tone and distortion circuitry. I’ve built and tested the main board, now just need to make a cabinet on a spare weekend. As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub hero_image


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LEAP#248 Pierce Gate Oscillator

The Pierce oscillator can be implemented using a minimum of components, typically: a digital inverter, one resistor, two capacitors, and a quartz crystal. The term “Pierce Gate Oscillator” generally refers to circuits where the digital inverter is implemented as a CMOS gate (inverter or NOR). This is a very common arrangement, and is used with microcontroller chips to provide the external clock source. The example build here uses a 4.273MHz crystal resonator and a 74LS14 schmitt inverter. As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub hero_image scope


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LEAP#247 pedalSHIELD UNO

In the AudioDSP project, I built an Arduino pedal/DSP unit based on the Electrosmash pedalSHIELD design. It worked well enough that I wanted to build the “real thing”, not only to give myself a good baseline on expected performance, but also to payback Electrosmash in a small way. Good OSH deserves support! As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub hero_image


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