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• Added support for B2A modules

  iliasam • 10/23/2024 at 15:02 • 0 comments

  I had published firmware and source code for modern B2A laser tape measure modules: 
  https://github.com/iliasam/Laser_tape_reverse_engineering/wiki/B2A-laser-rangefinder-modules

• X-40 laser tape reverse engineered

  iliasam • 09/22/2017 at 19:45 • 0 comments

  I have bought cheap Chinese "X-40" laser tape. 

  I disassembled it and found that it is really contains laser module that I reverse engineered earlier:

  
  

  But the module version is "701A", it's not like "512A" that I bought earlier:

  
  

  It can been seen that some components are placed at another places.

  I want to continue reverse engineering: measure some parameters like APD voltage, desolder  some SMD components  and measure their values. It can help me to increase parameters of  laser rangefinder module.

• Low modulation frequency test

  iliasam • 08/27/2017 at 17:31 • 0 comments

  I have tried to switch laser modulation frequency to lower frequency.

  I have tested several frequencies. The lowest frequency still was working fine is 25 MHz. I found that amplitude of signal decrease to 0.65 of initial value (at 150 MHz).

  I think that I need to make additional configuration of Si5351 PLL to set modulation frequency to lower frequency. My target is to set modulation frequency to 15 Mhz.

  Why I need lower frequency? To increase unambiguity distance - at 15 MHz is would be 10 m.

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