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  1. 4

    650 nm 200-250 mw Laser not work with 20M2

    Thank you Buzby!
  2. 4

    650 nm 200-250 mw Laser not work with 20M2

    Buzby, Great info. Thanks! Can you kindly post the diagram of the S6986 Circuit that you are using? If you can not because of proprietary or for some other reason, I understand. Been searching around and it looks like these are in the $20.00 +- range. May be looking wrong places
  3. 4

    650 nm 200-250 mw Laser not work with 20M2

    Hippy, Din realize it was such a mystery. Thot I had splained it Lucy in the last post. "Am attempting to beam a laser on one protoboard to another board with a photodiode or phototransistor that will flash an led when the sensor receives the laser transmission. I hope this explains what am...
  4. 4

    650 nm 200-250 mw Laser not work with 20M2

    Eclectic and Hippy, I appreciate the responses. Am attempting to beam a laser on one protoboard to another board with a photodiode or phototransistor that will flash an led when the sensor receives the laser transmission. I hope this explains what am trying to do. It works at short to med...
  5. 4

    650 nm 200-250 mw Laser not work with 20M2

    OK Eclectic, Lots of good info from you, Buzby and others. Thanks to All. Was not familiar with BPW34 or TSOP1838, so shall ck. them out. I suppose we can put this thread to sleep unless someone desires to provide more pertinent information. I believe I now have enough recommendations to...
  6. 4

    650 nm 200-250 mw Laser not work with 20M2

    Not trying to receive data; just on/off. What to you mean by "suitably driven"? "We have been on this thread for days now." ...Is there a time limit ( not aware of it )? Simple description: ( I hope)....just trying to achieve best selection for a laser and photo diode ( photo transistor ?)...
  7. 4

    650 nm 200-250 mw Laser not work with 20M2

    Thanks for the info, shall attempt to incorporate it into my testing. JB
  8. 4

    PICAXE Lasertag

    Amazing Project! Can you kindly post which phototransistor and laser you used? Also the circuits that interfaced these sensors to the 20M2? I have been using the schematic from Dave Bodnar at trainelectonics.com/Laser_Train_Detection. Am using a Qiaba Laser 650nm 5mW and a Vishay...
  9. 4

    650 nm 200-250 mw Laser not work with 20M2

    Eclectic, Thank you for your inquiry. Am attempting to get one protoboard with a laser and phototransistor to communicate with another identical board. Am shotguning sensors to find best laser and phototransistor combo to do this. Some of the sensors being tried are: 1. Vishay...
  10. 4

    Laser Recommendation

    I appreciate your recommendation. Amazon lists them as 5 mW. Do you have a link to your laser tag game? TIA
  11. 4

    Laser Recommendation

    Can anyone recommend a 650 nm/ 5-10 mW laser in the inexpensive-medium price range ( < $10/$15 ) that has worked well for them or would expect it to work well? There seem to be a plethora of choices!?!? TIA
  12. 4

    650 nm 200-250 mw Laser not work with 20M2

    Buzby, I appreciate your detailed technical information. I shall study and attempt to apply it to my project. JB
  13. 4

    650 nm 200-250 mw Laser not work with 20M2

    AllyCat, Thanks for your recommendation that I may want to use IR instead of lasers. I have used IR in the past and am now choosing to use lasers. I am uncertain why you choose to mention a 300 mW laser. I discussed a 200-250 mW laser but more importantly I believe I stated am using a 50mW...
  14. 4

    650 nm 200-250 mw Laser not work with 20M2

    Buzby, Thanks for the 2 suggestions! 1. "pulse the laser" 2. "tuned amplifier" I struggle somewhat with software and circuits. My knowledge is rudimentary but am mostly able to get projects accomplished. Software background: COBOL language in 1960's and self taught Basic. Circuits...
  15. 4

    650 nm 200-250 mw Laser not work with 20M2

    Thanks for the "magic tape" rec.; Have ordered and shall try. jb
  16. 4

    650 nm 200-250 mw Laser not work with 20M2

    Buzby, Thanks for the additional info. Eclectic, I believe this transparent tape would help my project. I went to the site ( from the link ) but it no longer exists. Do you have any other thoughts on where to locate such a tape? TIA
  17. 4

    650 nm 200-250 mw Laser not work with 20M2

    Great info! Thanks. Trying roughly for about 10 ft. Am definitely getting 4 ft. +. I can occasionally get beyond that, but the reception appears to be dependent upon a very focused laser and photo diode receptor. I should probably pay more attention to that. I did use an NPN 3904 transistor...
  18. 4

    650 nm 200-250 mw Laser not work with 20M2

    Hippy, Thanks for the information. I could request to please explain what "appear to be" above the legal limits. It is probably irrelevant because I am in the U. S.; therefore shall skip this request. I am attempting for a photo diode to receive the 50 mW laser output. It doe this but at a...
  19. 4

    650 nm 200-250 mw Laser not work with 20M2

    Alan, Thanks for your input. Your two thots were in back of my mind and now, no need to eventually bring them to surface. Yes, I wonder at the wisdom of using such a powerful 200-250 mw laser. Maybe I shall use the 50 mw laser and attempt to increase the sensitivity of the receiving photo...
  20. 4

    650 nm 200-250 mw Laser not work with 20M2

    This may be a better depiction of the NPN 2N3906 transistor circuit... Ground l l 1k Resistor l Laser l l Collector Base --- 1k Resistor -----20M2 pin Emitter l l +5v ( separate power )
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