I am having a bit of an issue with the current setup. Im trying to run multiple solenoid valves of a 16 channel relay optocoupler (http://www.ebay.com.au/itm/16-Channel-12V-Relay-Shield-Module-wiht-optocoupler-LM2576-Power-supply-Arduino-/141815612900?_trksid=p2141725.m3641.l6368). I am using a 19VAC 3 amp power supply. Currently my issue is that i can't seem to get the relay to activate when controlled by the relay. I can hear the relay module tick when i run my program, but the solenoid dosen't open. When i run the solenoid directly from the power source it works. Anyone have any idea where i went wrong?
#!/usr/bin/python import RPi.GPIO as GPIO import time GPIO.setmode(GPIO.BCM) # init list with pin numbers pinList =  # loop through pins and set mode and state to 'low' for i in pinList: GPIO.setup(i, GPIO.OUT) GPIO.output(i, GPIO.HIGH) # time to sleep between operations in the main loop SleepTimeL = 2 # main loop try: GPIO.output(2, GPIO.LOW) print "ONE" time.sleep(20); GPIO.cleanup() print "Good bye!" # End program cleanly with keyboard except KeyboardInterrupt: print " Quit" # Reset GPIO settings GPIO.cleanup() # find more information on this script at # http://youtu.be/oaf_zQcrg7g