UTMonkey
Member
Hi All,
I don't get much time for electronics but I really enjoy it when I do.
I just wanted to give an update of my latest project, it seems to be a common project on this forum and from the advice supplied I thought I would show you how far I have got.
Most beam break projects require the use of a "tube" to act as a collimator, I was able to find a sleeved cable grommet (Image1) which looks ideal.
Thing is I am not sure I need it as the IR Emitter I am using is the SFH4503 which according to the data sheet has a 8 degree emitting angle - please take a look at the datasheet and see what you think https://www.electro-tech-online.com/custompdfs/2008/10/84848.pdf
Anyway, take a look at the final project and let me know what you think, the infrared receiver is a Vishay TSOP34838 https://www.electro-tech-online.com/custompdfs/2008/10/46678.pdf (the resistor wheel allows me to control the current to the IR emitter)
The test environment is basically the back room of my house which is roughly 3 metres wide, from the initial test results I get the impression that the emitter I have can do a lot LOT better.
One query I do have though is that although the beam break circuit works fine I find that If I am within 12 inches of the emitter no beam break is detected. Having thought about this for a while I am guessing it is because the power of the beam is strong enough that at that distance it reflects off everyday clothing?
So I am going to try next to not only increase the distance but also reduce the 12 inch blind spot, one thing I may try is to reduce the duty cycle of the modulated pulse to see what happens.
Other ideas perhaps are to enclose the circuit in a dark box with perhaps a strip of infrared filter.
If anyone has any suggestions I would be very grateful.
All the best!
Mark
I don't get much time for electronics but I really enjoy it when I do.
I just wanted to give an update of my latest project, it seems to be a common project on this forum and from the advice supplied I thought I would show you how far I have got.
Most beam break projects require the use of a "tube" to act as a collimator, I was able to find a sleeved cable grommet (Image1) which looks ideal.
Thing is I am not sure I need it as the IR Emitter I am using is the SFH4503 which according to the data sheet has a 8 degree emitting angle - please take a look at the datasheet and see what you think https://www.electro-tech-online.com/custompdfs/2008/10/84848.pdf
Anyway, take a look at the final project and let me know what you think, the infrared receiver is a Vishay TSOP34838 https://www.electro-tech-online.com/custompdfs/2008/10/46678.pdf (the resistor wheel allows me to control the current to the IR emitter)
The test environment is basically the back room of my house which is roughly 3 metres wide, from the initial test results I get the impression that the emitter I have can do a lot LOT better.
One query I do have though is that although the beam break circuit works fine I find that If I am within 12 inches of the emitter no beam break is detected. Having thought about this for a while I am guessing it is because the power of the beam is strong enough that at that distance it reflects off everyday clothing?
So I am going to try next to not only increase the distance but also reduce the 12 inch blind spot, one thing I may try is to reduce the duty cycle of the modulated pulse to see what happens.
Other ideas perhaps are to enclose the circuit in a dark box with perhaps a strip of infrared filter.
If anyone has any suggestions I would be very grateful.
All the best!
Mark