Here is a challenge for all you electronic engineers:
What I am trying to make of has common components that can be found in Radio Shack or common electronic stores. The object of this project is to make a motion detector by using an ordinary "pen" LASER:
|--------| |-------|
|-Sensor-||<-------------||-LASER-|
|--------| |-------|
The Sensor will be equipped with a CdS Cell (or whatever that can detect light) that will detect the LASER beam. If the LASER beam is removed or "tripped" or anyway blocked from the CdS Cell, the Sensor will sound an alarm via a normal speaker. The only way to reset the Sensor is to turn off the power supply.
Remember that once the LASER beam is tripped even for a fraction of a SECOND, the alarm sound must STAY ON even if the beam is restored. Make sure the sensitivity of the CdS Cell is at the proper value (don't want normal light to keep the Sensor on all the time, do you?).
Power Source: 12 Volt DC
Instruction Type: Your choice but a schematic diagram is okay. Labeling is appreciated (e.g. type & value of resistor, capacitor, etc.)
I am doing this just for fun and it's one of my interested hobbies, but if you want to help; it is highly appreciated. I can go out and buy one, but where's the fun in that, and it might cost more than what I already have or can afford. You can do whatever you want, but it should be simple enough for everyone to do.
Thank you all who participate.
What I am trying to make of has common components that can be found in Radio Shack or common electronic stores. The object of this project is to make a motion detector by using an ordinary "pen" LASER:
|--------| |-------|
|-Sensor-||<-------------||-LASER-|
|--------| |-------|
The Sensor will be equipped with a CdS Cell (or whatever that can detect light) that will detect the LASER beam. If the LASER beam is removed or "tripped" or anyway blocked from the CdS Cell, the Sensor will sound an alarm via a normal speaker. The only way to reset the Sensor is to turn off the power supply.
Remember that once the LASER beam is tripped even for a fraction of a SECOND, the alarm sound must STAY ON even if the beam is restored. Make sure the sensitivity of the CdS Cell is at the proper value (don't want normal light to keep the Sensor on all the time, do you?).
Power Source: 12 Volt DC
Instruction Type: Your choice but a schematic diagram is okay. Labeling is appreciated (e.g. type & value of resistor, capacitor, etc.)
I am doing this just for fun and it's one of my interested hobbies, but if you want to help; it is highly appreciated. I can go out and buy one, but where's the fun in that, and it might cost more than what I already have or can afford. You can do whatever you want, but it should be simple enough for everyone to do.
Thank you all who participate.
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