A new open source hardware project every month
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The MAX147 is a 12bit 8 channel analog to digital converter. will_j plans to interface a MAX147 to the web platform, but he used the Bus Pirate and the PirateShip GUI to learn about the chip first. There’s a screenshot of the terminal output in the forum.
The Bus Pirate is available at Seeed Studio and Adafruit Industries.
Starlino used the Bus Pirate to explore a Freescale MMA7456L, a three-axis accelerometer with both I2C and SPI interfaces.
The surface mount chip is on a homemade though-hole breakout board, there’s also a tutorial on this handy adapter.
You can get a Bus Pirate for $30, including worldwide shipping at Seeed Studio. Adafruit also has the Bus Pirate and probe cables in stock and ready to ship.
SparkFun has a tutorial about playing WAV files with an 8-bit AD5330 Digital Analog Converter (DAC). The AD5330 has an 8-bit parallel interface and operates from 2.5v to 5.5v.
SparkFun uses an Arduino, micro SD shield, and AD5330 breakout board to play WAV files. The Arduino reads uncompressed WAV files from a FAT formatted SD Card using the MMC/SD/SDHC FAT library. It writes the bytes to 8 output pins, and clocks the WAV data into the AD5330.
See the latest version in the documentation wiki.
Reliq sent a 1-Wire iButton demo using the Bus Pirate:
I work in an engineering firm, and the large format color printer we have uses iButtons on the ink tanks to tell the machine what has been plugged in. These particular buttons are write-only. As you can see in the pic, I have the body connected to GND, and the cap connected to MOSI. The +5v is jumpered to the Vpullup pin.
More demo goodness after the break.
See the latest version in the documentation wiki.
The 24AA02E48 is an I2C EEPROM with 256bytes of data storage. It’s similar to other EEPROMs we’ve looked at in the past, but this chip has a 48bit EUI-48 ethernet MAC address permanently burned into the upper-most six bytes. This is an easy and cheap way to buy a legit, totally unique MAC address for your ethernet projects.
Keep reading for a complete 24AA02E48 demo using the Bus Pirate universal serial interface. If you’re not using a Bus Pirate, that’s OK, you can still follow along and get a better understanding of how to implement this chip in your own application.
You can preorder assembled Bus Pirate hardware at Seeed Studio for $30, including worldwide shipping. This preorder will end October 15, 2009.
This is an old version, see the latest version on the documentation wiki.
The DS1307 is a simple, inexpensive I2C real-time clock, it’s somewhat similar to the PCF8563 that was previously demonstrated with the Bus Pirate.
This chip has some nice features. It has internal capacitors on both oscillator pins, the only required external part is a 32.768kHz time-keeping crystal. It also has a backup battery input so it can keep time during power failures. The battery backup also applies to 56byte of general purpose RAM.
Keep reading for a complete DS1307 demo using the Bus Pirate universal serial interface. If you’re not using a Bus Pirate, that’s OK, you can still follow along and get a better understanding of how to implement this chip in your own application.
