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Recent content by Hemlock_Mike

  1. Hemlock_Mike

    DTR BDR-209 405nm Laser Diode shows a blurry square light.

    Jordan sells good parts - No problems here. Does the artifact rotate when you turn the lens? That can tell you where the problem is caused.
  2. Hemlock_Mike

    My thor m2 1 watt version turns on bright then slowly powers down. What do I do?

    LiIon cells typically charge to about 4.2 volts when full. 2800 mA HOURS may be a little over rated but can depend on the discharge rate.
  3. Hemlock_Mike

    Driver question

    Will a Micro flex V5 driver output 600mA to a BDR 209 diode? Mike
  4. Hemlock_Mike

    1w 405nm pointer build.

    I'm building one like it now. What did you use for a driver and lens ?? Thanks - Mike
  5. Hemlock_Mike

    LPF History 107 – Final Exam

    I'm still around !!! At 72, I have slowed a bit but I still play with my toys. My left eye was damaged in cataract surgery and I can't see to solder well any more and had to sell my plane but I survived covid easily !!! It's hard to believe - almost 14 years ! Carry on dudes !!! Hemlock Mike
  6. Hemlock_Mike

    DTR G8 lens

    Jordon -- That lens module simply would not go into the heat sink. It acted like it was cross threading. Other lens assemblies fit right in and the G8 lens fit my other heat sinks. I noticed that the lens is farther from the diode in my 2 watt but it has plenty of threads and it works...
  7. Hemlock_Mike

    N2 Pumped Dye Laser

    It's been years for me on N2 lasers - Too Noisy! Great work on your projects. I'm impressed. HM
  8. Hemlock_Mike

    DTR G8 lens

    Jordon -- I got a G8 lens some time back. The lens would not fit your Cu housing for my blue Phaser gun. Today, I put it in a 2W blue pointer and WOW does it make a difference. I will buy another if it fits the Cu heat sink in my Phaser. Can this G8 glass be transferred to a different housing...
  9. Hemlock_Mike

    Need help getting older!

    When I started in electronics, it was vacuum tubes and high voltage. No such thing as transistors, LEDs OR lasers. I believe the maser was first. Mike
  10. Hemlock_Mike

    Calling all FAPpers - FAP800 - precautions and driving advice

    That's why I clamped my TI PS to a voltage which under "normal" conditions would provide 30 Amps for test purposes. If the FAP decided to suddenly draw 85 Amps at a voltage which can provide only 30 Amps, Something went WAY wrong. Mike
  11. Hemlock_Mike

    Calling all FAPpers - FAP800 - precautions and driving advice

    I picked the 50 Amp module so it would be running at 80% at full 40 Amp module rating. Sometime, I may want to try the FAP at rated 40 Amps. It is unlikely a massive module failure could draw 85 Amps and if it did, the FAP was trashed anyway. The other failure would be an external short which...
  12. Hemlock_Mike

    Calling all FAPpers - FAP800 - precautions and driving advice

    Alaskan -- I'll try posting my pix again. The Bottom pix is the FAP with TI driver. The cells are under. The other pix is my schematic for the TI PS. I'm using the Fiber optic cable to blur the dots in the beam. That 50 Amp current supply regulated on the (-) side which might be good since...
  13. Hemlock_Mike

    Calling all FAPpers - FAP800 - precautions and driving advice

    Hey Desert guy! I can't find my schematic I drew up - But - I downloaded pages 3 & 4 of the data sheet. It sorta come back. Remember, this is a "stable voltage" regulator. 1. Pins 4 & 18 set the max voltage output. I forget the module voltage for 40 Watts. 2. Here's the magic ---- Pin 20...
  14. Hemlock_Mike

    Calling all FAPpers - FAP800 - precautions and driving advice

    I'll have to find my schematic I drew up. I thought I sent you a copy of it. I simply followed the data sheet for that. There was a resistor for MAX current and an adjustable pin too as I recall Mike
  15. Hemlock_Mike

    Calling all FAPpers - FAP800 - precautions and driving advice

    I am using the TI PTH08T250 supply. It is rated for 50 Amps but I've limited it to 30 Amp MAX for now. I am using 3 18650-25R cells to light it up but I can regulate the current from 0 to 30 Amps with a small pot. For basic lens testing, I run it just above threshold because my cooling is...




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