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Yet Another Simple Pot-controlled 555 PWM generator
Very cool project! I am just curious if you looked a linuxcnc as a possible machine controller? In my build I tried mach3 but stuck with linuxcnc after having a pretty serious crash with mach3. It is very stable and may solve your jitter issues. Thanks for sharing!
CNC Drum Plotter
You could always just build the laser detection circuit and put a buzzer on the led signal output. That is covered in the first few steps. The programming part is mainly just to send the email and is a basis for incorporating this system into another program. My first design was using a mirror to reflect the laser back to the sensor like you suggested. However, adjusting the reflection mirror is very tedious. A very small angle change in the mirror will have a massive impact on the reflection point. This problem will be amplified as the distance between laser source and mirror is increased. You may also find that as dust gathers on the mirror it will slowly degrade the laser strength until the tripwire is randomly triggered.
Thank you! I was thinking of setting the laser trip wire up next to the cat food as our house has such a low number of actual intruders.
Raspberry Pi Laser Security...View Instructable »
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