Raspberry Pi A+/B+ Sensor Connection Hat (RASPI-PLUS-GVS-CFG)

$22.45 + shipping

This hat (card) is modeled on the Arduino Sensor Shields, also known as GVS shields. Arduino Sensor Shields bring out the pins of the Arduino to GVS (set of Ground, Voltage and Signal) pins.

Unfortunately, the Raspberry Pi can't work with the same 5V GVS sensors and devices as the Arduino since the Raspberry Pi has 3.3V I/O. The RasPi-Plus-GVS-Cfg card allows the Raspberry Pi Model B+ to communicate with the same 5V sensors by performing voltage translation from the 3.3V of the Raspberry Pi to 5V.

RasPi-Plus-GVS-Cfg-X2-CCA-640px.jpg

Features

  • All Raspberry Pi I/O lines
  • 8-bit bidirectional 3.3V to 5V level translator
  • Configuration EEPROM
  • Fuses on power

Raspberry Pi I/O lines

All of the Raspberry Pi Model B+ I/O connections are brought to GVS (Ground-Voltage-Signal) connectors. This is:

  • (17) GPIO lines on GVS connectors
  • (2) SPI interfaces (can also be 5 GPIO lines
  • (1) UART interface (can also be 2 GPIO lines
  • (1) I2C interface (can also be 2 GPIO lines

Level translators

The BBB-GVS board use an 8-bit wide Texas Instrument TXS0108 voltage translator to convert up to 8 of the 3.3V I/O lines to 5V I/O levels.

Configuration EEPROM

The card has a Raspberry Pi Model B+ configuration EEPROM.

Fuses

  • The board has Resettable fuses on the 3.3V and 5V from the Raspberry Pi.
  • These fuses protect your Raspberry Pi from overloads.
  • These fuses are 1/2 Amp PTC fuses.
  • PTC fuses have certain advantages (they are self healing) and disadvantages (they are not like a wire fuse which acts like a switch).
  • If you trust your wiring you may choose to solder a wire over the fuse.
    • Care should be taken when doing so.

Technical Documents

Detailed technical documents are here.