Latest Digital Signal Processing Projects

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EFM8 Sound Synthesizer: Driving the Speaker

Part 2 in the “How to Make an EFM8-Based Sound Synthesizer” series.

September 11, 2015 by Robert Keim

Ambient Light Monitor: Zero-Cross Detection

Part 4 in the “How to Make an Ambient Light Monitor” series

August 16, 2015 by Robert Keim

Ambient Light Monitor: Understanding and Implementing the ADC

Part 2 in the "How to Make an Ambient Light Monitor" Series. Our smart ambient light monitor will need to digitize and analyze signals from an optical detector, so it is time to explore the EFM8’s integrated analog-to-digital conversion functionality.

August 05, 2015 by Robert Keim

Ambient Light Monitor: Measuring and Interpreting Ambient Light Levels

Part 3 in the “How to Make an Ambient Light Monitor” series. The project continues by building an ambient light sensor circuit on a breadboard, digitizing the circuit’s output signals, and interpreting the digitized measurements.

August 05, 2015 by Robert Keim

Ambient Light Monitor: Display Measurements on an LCD

Learn how to use an EFM8 microcontroller to convert current and voltage measurements to digits that can be displayed on an LCD. We'll discuss a convenient way to report analog-to-digital conversion values that represent current and voltage amplitudes.

July 26, 2015 by Robert Keim

Introduction to Arduino SPI Library with LTC1286 and DAC714

Introduction to the Arduino SPI Library with example sketch for the LTC1286 12 Bit ADC and the DAC714 16 bit DAC.

July 17, 2015 by Aaron Dennis

Keep Your Cool: Monitor Temperature with an Arduino

The LM35 is an ideal temperature sensor for measuring ambient temperature. It provides a linear output proportional to the temperature, with 0 V corresponding to 0 degrees C and an output voltage change of 10 mV for each degree C change. LM35s are easier to use than thermistors and thermocouples because they are so linear and require no signal conditioning.

June 28, 2015 by Tim Youngblood

How To Use Arduino’s Analog and Digital Input/Output (I/O)

The Arduino can input and output analog signals as well as digital signals.

June 10, 2015 by Tim Youngblood

Communicating Serially with the Arduino

Communicating serially with the Arduino is easy! Here, we'll show how to take some temperature measurements and then send the measurements over the serial link.

June 01, 2015 by Tim Youngblood