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If you’d like to start experimenting in DSP, or just want to build a guitar pedal, here’s the project for you. It’s an audio echo using just a microcontroller from the fruitful workshop of [Vinod]. For his circuit, [Vinod] fed the output of a small electret microphone into a small amplifier, and then into the [...]

Tags:  delay dsp microcontroller vinod electret-microphone guitar-pedal digital-delay microcontrollers  

[Patrick's] latest Instructable walks us though making a clap clap on / clap clap off type of switching circuit, similar in use to that sometimes popular commercial product seen on TV. He does this by using a standard electret microphone, half of an LM324 op amp, a voltage comparator and a PIC micro controller. The [...]

Tags:  clap clapper diy patrick pic-micro-controller clap-clap electret-microphone classic hacks