For rAudio - Control GPIO-connected relay module for power on / off equipments.
- Power
on
off
audio equipments in sequence** - Up to 4 equipments(relays)
- Delay setting for each equipment(relay)
- Idle timer power off
- Notify last minute warning with countdown
- Reset on play or
reset
button during warning
- A relay module can be connected to GPIO, to see how it works, by anyone with basic skill.
- Wrong connection may just damage your RPi. (only 5V)
- Requires electrical skill and knowledge to connect these relays as power switches. (110V / 220V)
- Electric shock can kill.
Dirt cheap on ebay
- Relay module
- use high/low level trigger and set to high
- For complete isolation:
- Remove all jumpers
- Connect all center pins to RPi ground
- Power relay module with a separated 5V power supply
- LEDs for GPIO 3.3V status
- Switches
- Normal : GPIO 3.3V > LED ON, relay ON
- Off : GPIO 3.3V > LED ON, relay OFF
- Bypass : Direct 5V > LED OFF, relay ON