I've been trying to get the 555 chip to work in monostable mode and can't figure out what the problem is. As far as I'm aware it's configured correctly, and the 3x 1M resistors and 1uF capacitor should turn the led on for ~3.3s after the blue wire is grounded. What actually happens is that grounding the pin 2 turns on the LED but is turned off the instant the blue wire is removed from ground. Thanks in advance for any help.
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