The PiOT relay board allows you to bond a GPIO pin to a relay with the touch of a button. No need to tie pins using resistors, and no need to re-wire the circuit when you want to change which GPIO pin fires which relay. Simply select your GPIO pin using the on-board tactile buttons and two-digit 7-segment display, and switch that pin high or low to fire your designated relay!
The on-board display can be configured to show the Pi’s BCM or Pin number system for GPIO/relay bonding, and also demonstrates visual feedback of the relay on/off status for easy monitoring. The display can also be used to test relays before configuring them with your Pi, in addition to providing menu access for setting configuration.
The PiOT relay board also features multiple innovative start-up modes designed to combat “chatter” on the GPIO which can lead to unexpected behavior. Variable delayed start-up allows users to pause activation of the relays for a short period during boot, ensuring that GPIO pins are correctly set prior to use, or the alternative handshake mode utilises a specific pulse train to enable activation and de-activation of the relay board at the user’s will. No more accidental switching of relays at boot!
The PiOT relay board uses low current (~100mA) PWM (pulse width modulation) to significantly reduce the current required to hold the relays on when compared to other relay boards. This means that relay boards can be stacked up to 5 high without requiring additional external power.
Warning! Relays can be used to switch large voltages and currents. Please, please, please be careful when undertaking any work with this type of power – it can kill!
4 x OMRON G5LA-1 Relays for Switching up to 10A @ 250VAC, or 10A @ 24VDC
4 x Tactile Buttons for GPIO/Relay Bonding
Two-Digit 7 Segment Display for Visual Feedback & Setting Control
Micro-controlled GPIO/Relay Setting & Switching (No Jumpers Required!)
40 Point Raspberry Pi GPIO Modelled Input
5V & 3.3V Input Compatible
Low Holding Current via PWM ~ 100mA per Relay Board
Stackable Relay Board (Up to 5 Without External Power)
Multiple Start-Up Modes to Negate Boot GPIO Chatter (Delayed/Handshake)
Pi Zero Mounting Points
ModMyPi PiOT Relay Board Wiki
OMRON G5LA-1 Datasheet
45K22 PIC Datasheet