Hi guys, hopefully somebody can help me out with this. My dad likes to work on watches and would like to know the various rates of unknown hairsprings. I thought I could accomplish this with an IR LED receiver/transmitter circuit. When the spoke inside the hub of the hairspring breaks the IR signal it would serve as the input for a counter program. Long story short, I have to use a 555 timer for the basic stamp microcontroller because the freqout command will not allow for any other simultaneous actions. With the 555 circuit I can simply use a hi/low command and get the job done. My problem is my 555 circuit is not working properly. If I take the IR LED transmitter out of the circuit I can get a debug counter to my computer which allows me to tune the potentiometer to desired frequencies. If I place the IR LED transmitter back into the circuit I end up with a 0 output to the debug screen which essentially means I don't have anything coming out of the output pin of the 555 chip. So I was wondering what might be causing this? I have reworked this circuit and checked it probably 20 times over and get the same results every time. I attached the diagram along with my circuit, hopefully somebody can see something or might have an idea as to why it is behaving this way. I am also open to suggestions if somebody has another idea which they think might be easier and/or more efficient for the project at hand. Thanks in advance for any help and sorry for the long winded description.
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