NaV-1 Arduino Soundgin-Babblebot Synth circuit

The major functional blocks necessary for designing a general-purpose audio oscillator are outlined, along with the details of the current prototype. The implementation is in the mode of an analog computer, as the desired outputs are sine and cosine values...

Arduino Producing DTMF Tones

The project involves teaching an Arduino to generate DTMF (Dual-Tone Multi-Frequency) tones using the HT9000A DTMF chip. These tones are the familiar "touch tones" used in telephone systems. The output volume from the chip is low, suggesting the need for...

getting started with arduino chapter seven

This is part of a series titled "Getting Started with Arduino," a tutorial on Arduino microcontrollers. The first chapter is here, and the complete index is available as well. This week focuses on the concept of real-time and how time...

7 Watt Audio Power Amplifier Circuit Schematic

This compact amplifier is built around the TDA2003 integrated circuit, which can deliver 4W RMS at a 4-ohm load. The TDA2003 offers enhanced performance while maintaining the same pin configuration as the TDA2002. It retains the advantageous features of the...

Serial Servo Controller with Arduino

This document explains how to utilize an Arduino to control up to 12 servos simultaneously with minimal jitter. A straightforward serial interface allows for the control of the position of these 12 servo channels. Additionally, it is possible to save...

The Audionics CC-2 Amplifier

The Audionics CC-2 is named after Cliff Moulton, the chief engineer, and Charles Wood, the president of Audionics. However, the true designer of the amplifier is Bob Sickler, whose initials, "RLS," appear on the schematics. Following Bob's passing in Portland,...

get on the blinkm bus with a blinkm cylon

BlinkMs are entertaining devices that function as small network components, each assigned a unique address on an I2C network. The potential of BlinkMs is particularly evident in their ability to simplify the control of multiple RGB LEDs. For a demonstration...

adding audio to arduino projects

A simple solution for enhancing sound output from a microcontroller is the LM386 series of amplifier chips, which provide high-quality audio for under one dollar. These chips can be used to create a functional MP3 docking station and serve as...

Keyless Entry Arduino

If the number 8 is pressed, it will affect the wire ROW3 and COL2. This allows the microcontroller to determine which key was pressed using only 7 wires from the keypad. The described circuit involves a matrix keypad configuration, which is...