IR detector for marble track.
Verfasst: 02 Dez 2019, 14:58
IR detector for marble track.
This detector can be inserted anywhere on the existing marble track. It has the dimensions for the Fischertechnik blocks. The detector works with an IR led and a photodiode as receiver. The 3D print housing is made in such a way that it shields the ambient light as much as possible. If necessary, an extra cover can be mounted afterwards on top. It has 5 mounting possibilities for optimal environmental suppression. The resistance values are given for 5V. If 9V is desired, the values can be increased slightly. The current values will also work at 9V but the current is higher. I use my regular 3 pin connection: output, VCC, GND. Because there is a pullup resistor you have to take into account that the output voltage will have the same value as the installed VCC. Therefore, do not use 9V where the output should be 5V max!
HD: https://www.flickr.com/photos/fotoopa_hs/49157990727
HD: https://www.flickr.com/photos/fotoopa_hs/49157280378
HD: https://www.flickr.com/photos/fotoopa_hs/49157990747
The 3D print files on Thingiverse: https://www.thingiverse.com/thing:4015962
On the picture the cover plate is still shown with 2x2 pins, but the .stl file now contains 2x4 pins. This gives you 5 possibilities to mount the shield. The shield is only needed when there is direct sunlight. You have to be a bit handy to solder the whole thing, but I'm 76 years old, I need strong glasses with extra light and then it works fine.
Frans.
This detector can be inserted anywhere on the existing marble track. It has the dimensions for the Fischertechnik blocks. The detector works with an IR led and a photodiode as receiver. The 3D print housing is made in such a way that it shields the ambient light as much as possible. If necessary, an extra cover can be mounted afterwards on top. It has 5 mounting possibilities for optimal environmental suppression. The resistance values are given for 5V. If 9V is desired, the values can be increased slightly. The current values will also work at 9V but the current is higher. I use my regular 3 pin connection: output, VCC, GND. Because there is a pullup resistor you have to take into account that the output voltage will have the same value as the installed VCC. Therefore, do not use 9V where the output should be 5V max!
HD: https://www.flickr.com/photos/fotoopa_hs/49157990727
HD: https://www.flickr.com/photos/fotoopa_hs/49157280378
HD: https://www.flickr.com/photos/fotoopa_hs/49157990747
The 3D print files on Thingiverse: https://www.thingiverse.com/thing:4015962
On the picture the cover plate is still shown with 2x2 pins, but the .stl file now contains 2x4 pins. This gives you 5 possibilities to mount the shield. The shield is only needed when there is direct sunlight. You have to be a bit handy to solder the whole thing, but I'm 76 years old, I need strong glasses with extra light and then it works fine.
Frans.