The TV-B-Gone is a well known piece of kit in hacker circles: just point it at a noisy TV in a public space, hit the button, and one of the hundreds of IR remote codes for “Power Off” t… ...

Long-range RC transmitter “I started using Bluetooth devices like the HC-05 modules, but I found that these sometimes randomly disconnected. Since then I’ve been using the NRF24L01 modules ...

The Arduino reads the IR code from a remote and simply powers up the Pi. ... Arduino, or using IR. ... or send a message over I2C or SPI to some external gadgetry to kill the power.