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Specifications
- Brand Name: keyestudio
- Accessory Type: Relay Shield
- Compatible With: Raspberry Pi 4B
Keyestudio RPI 4-Channel 5V Relay Shield For Raspberry Pi 4B / CE Certification
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- for 3 month
- for half a year
- Requires Alitools extension
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Customer Reviews
Some details are not ok here. 1. Standoffs supplied are short (10mm only) needs 11-12mm.... 2.First and last relay output terminals are covered by the mounting screws. Short screw or nuts would not help, there is still risk of dangerous failure when used for switching 230VAC. I suggest using terminals with 45deg wire connection angle. --- seems like designers never had to connect anything to this module prior to mass production. :/ not really safe
well made good quality, i like the pcb. Here is sample code in Python #GPIO 4,22,6,26 BCM # import GPIO and time import RPi.GPIO as GPIO import time # set GPIO numbering mode and define output pins GPIO.setmode(GPIO.BCM) GPIO.setup(4,GPIO.OUT) GPIO.setup(22,GPIO.OUT) GPIO.setup(6,GPIO.OUT) GPIO.setup(26,GPIO.OUT) # cycle those relays try: while True: GPIO.output(4,True) time.sleep(1) GPIO.output(4,False) GPIO.output(22,True) time.sleep(1) GPIO.output(22,False) GPIO.output(6,True) time.sleep(1) GPIO.output(6,False) GPIO.output(26,True) time.sleep(1) GPIO.output(26,False) finally: # cleanup the GPIO before finishing :) GPIO.cleanup()