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Category Archives: Arduino

SPI7SEGDISP4.40-1R LED displays are back in stock

Posted on July 26, 2013 by R-B One comment

SPI7SEGDISP4.40-1R is a serial 4-digit seven segment LED display based on MAXIM’s MAX7219 device. This display module can be interfaced with any microcontroller that has 3 I/O pins available. If the microcontroller features a built-in hardware SPI, then the display module can be interfaced as a SPI slave device. In that case the SPI signal lines SDO (serial data out), SCLK (serial clock), and SS (slave select) from the microcontroller can be directly connected to the DIN, CLK, and LOAD pins labeled on the display module. CS is active low signal. In case the host microcontroller doesn’t have a hardware

Universal TV sleep timer project

Posted on July 23, 2013 by R-B Leave a comment

This TV-Go-Sleep timer turns off any TV after a preset delay time. This project is built around an Arduino microcontroller that uses an open source TV-B-Gone library. The hardware part consists of a pushbutton switch to set the delay time, which is shown on a 7-segment display. When the timer expires, the Arduino transmits “Turn OFF” codes for all known TVs through IR LED, and the TV shuts down.

Arduino cell phone

Posted on July 20, 2013 by R-B Leave a comment

This instructable describes how to make a DIY GSM phone using Arduino Uno and GSM/GPRS shield. The project uses a TFT LCD with touch screen to provide an user interface required to operate the phone. This Arduino phone can receive & send message, dial & answer phone calls, and display real time clock.

Arduino clock with MP3 alarm

Posted on July 18, 2013 by R-B Leave a comment

Here’s a very nice digital alarm clock using Arduino and VS1053 MP3 decoder board. VS1053b is a single-chip MP3/AAC/-WMA/MIDI audio decoder that contains a high-performance, proprietary low-power DSP processor core VS DSP4, working data memory, 16 KB instruction RAM and 0.5+ KB data RAM for user applications running simultaneously with any built-in decoder, serial control and input data interfaces, upto 8 general purpose I/O pins, an UART, as well as a high-quality variable-samplerate stereo ADC (mic, line, line + mic or 2×line) and stereo DAC, followed by an earphone ampli?er and a common voltage buffer. This project uses 128×64 GLCD

DIY FM transmission station using Arduino

Posted on July 16, 2013 by R-B One comment

This project describes an Arduino-based FM transmission using the KT0803K Digital Stereo FM Transmitter Radio-Station-on-a-Chip. The KT0803K device is designed to process high fidelity stereo audio signal and transmit modulated FM signal over a short range. It features an on-board 20-bit audio ADC and supports standard I2C interface for frequency setting and power control. The project uses the Nokia 5110 GLCD for display and a potentiometer for varying the frequency of FM transmission.

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