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How much faster can an algorithm run in FPGA fabric than in a processor? It depends on the algorithm, but often, much, much, faster.
Estimating Pi with the Monte Carlo Method
I wasn't happy with the way the square waves sound, so I explored using other methods of generating sound waves with Arduino.
Generating Audio with an Arduino and a Resistor Ladder DAC
A discussion about digital sound synthesis.
PWM Sound Synthesis
A photoresistor can sense the subtle changes in light intensity caused by your blood to detect your heartbeat!
Detecting Heart Rate with a Photoresistor
Learn about photoresistors and the process of characterizing their response to light intensity.
An R/C servo can be used to make a gauge to measure the intensity of light.
Servo Brightness Gauge
How should we go about figuring out how fast the Cora Z7 is? What about using both CPU cores? What about using a full OS?
Estimating Pi with a Cora Z7 Running Linux
Exploring the signals behind Arduino's Servo library, and characterizing a servo's response to pulse width.
Servo Signals and Characterization