Pimoroni OnOff SHIM for Raspberry Pi
Compact power switch SHIM for Raspberry Pi, enabling clean hardware power on/off without a dedicated HAT footprint.
Pinout
- Micro-USB power input
Power input to the OnOff SHIM from a micro-USB power supply; the product page says to plug the micro-USB power supply into the micro-B connector, then press the button to switch on power and boot the Pi.
Type · power - Raspberry Pi 40-pin GPIO header
Soldered/stacked connection to compatible 40-pin Raspberry Pi GPIO header; the product page says the SHIM can be soldered straight onto the GPIO pins and is compatible with 40-pin header Raspberry Pi models.
Type · connector - BCM17BCM17
Shutdown-button sense line watched by the Pimoroni clean-shutdown daemon; product page says BCM pin 17 is watched and when pulled low by a button press it initiates clean shutdown.
Type · signal - BCM4BCM4
Power-cut control line used by the Pimoroni daemon; product page says BCM pin 4 is pulled low just before shutdown to completely cut power to the Pi.
Type · signal
Start wiring
Shield
Verify supply voltage and logic levels before powering up.
Module pins: Micro-USB power input, BCM17, BCM4. Schematik maps them to your board in the app.
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