Use two HAT/pHAT on a Raspberry PiDesigned by 8086 Consultancy in United Kingdom
Allows two HAT or pHAT (or a mix) to be attached to a single Raspberry Pi 40 way connector. All pins are connected except ID_SD and ID_SC (HAT EEPROM) which have solder jumpers - this allows HAT wh...Read More…
Allows two HAT or pHAT (or a mix) to be attached to a single Raspberry Pi 40 way connector.
All pins are connected except ID_SD and ID_SC (HAT EEPROM) which have solder jumpers - this allows HAT which follow the specification correctly to operate without a conflict on the EEPROM. The EEPROM on the primary HAT (over the Pi) is always connected to the Pi and if the solder jumpers are bridged the ID_SD and ID_SC signals are connected to both primary and secondary HAT (for use when only the HAT/pHAT in the secondary connector has an EEPROM). When not using the EEPROM you may need to manually configure the Pi for your HAT.
Before ordering/using multiple HATs you MUST check for conflicts - for example enable/select pins when using SPI, I2C addresses and GPIO pin conflicts and modes, I would advise checking on pinout and/or with the HAT seller for used pins/modes in use.
The Butterfly board would normally be used with the "Male + Long Female" headers ("Long Female" for the Pi + primary HAT and "Male" for the secondary HAT).
The PCB for sale are green.
Raspberry Pi / Touch pHAT / Unicorn HAT HD / Standoffs are not included - you are buying a Butterfly adapter PCB [and self solder connectors if selected from the options above].
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