Waveshare 8-ch Relay Expansion Board, Compatible with Raspberry Pi to Control High Voltage Products Such as Home Appliances

This RPi Relay Board (B) with 8-ch relays in high quality can load up to 5A 250V AC or 5A 30V DC. Onboard standard Pi 40PIN GPIO extension header, supports Raspberry Pi series boards and Jetson Nano.
5V Power supply voltage, 3.3V/5V Trigger signal, SPDT-NO,NC Contact form, 6mA (per channel) Closed current, screw terminal block Connector.
With Standard rail mount bottom case and Onboard LEDs for indicating relays status. Photo coupling isolation, prevent interference from high voltage circuit.
Relay control pin selection jumper, allows to control the relays by custom pins other than the default pins. Reserved control Interface, allows to work with controllers like PLC.
Provide online development resources, including examples in wiringPi, bcm2835, python, python-bottle (webpage control), and crontab (cron job).