Raspberry Juice
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Overview
The Raspberry Juice serves as a power switch for the Raspberry Pi. This expansion board can turn the power on or off at a scheduled time.
Specifications
The Juice always uses about 2mA/10mW. The board is rated for a maximum current of 1A.
Use
The Raspberry Juice can be found using I2C or SPI at address 0xA4, and has the following read ports:
| Port | Returned value (in milliseconds) |
|---|---|
| 0x20 | Time until power off |
| 0x21 | Time until power on |
Additionally, the following can be written to the Juice:
| Port | Effect |
|---|---|
| 0x20 | Set the time in milliseconds until power off |
| 0x21 | Set the time in milliseconds until power on |
So, for instance, writing 10000 to port 0x21 and 1000 to 0x20 will cut the power in 1 second, and then turn on the power 9 seconds later.