Hi, I am a new member here. I have come across a problem regarding a logic with a resistor connected to the ground, and one without this resistor and ground. It operates normally with this resistor connected to ground. However the one without has problem operating normally. Attached is the circuit diagram with the 100ohm resistor. May I ask why it is needed there so that it operates normally? Have been trying to figure this out but I am not sure why and the difference.
Many thanks!
Many thanks!
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