Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers



Search results

  1. H

    Odicforce Boost Driver?

    I secound what Paul said. Having a CV driver with a max current limitation isn´t the same like a real CC driver. It eventually can protect your diode from getting killed but due to temperature changes the the current will change and the output power of the diode as well. So all measurments of a...
  2. H

    Odicforce Boost Driver?

    Ok thanks for the clarification. So well, the FP6291 is almost a tuned SX1308 with a OC pin instead of NC. But like Paul stayed correctly in this configuration just a CV driver with a over current protection. Beside this, the pinout for both ICs is identical and even the reference Voltage at...
  3. H

    Odicforce Boost Driver?

    This was not to you but to jnrpop. Hoever if you are having the driver, the better to reverse engeenier it. I´m just talking about what i can see on the pics. And the circuit looks exactly the same like a typical circuit for this IC exept the additional R3 resistor going from the voltage...
  4. H

    Odicforce Boost Driver?

    The IC as a quite popular boost driver IC sold by many manufaturers under different names. Most known as SX1308 or MT3608. Having here several SX and MT driver modules and all chips do have a different number on it. If you are unsure, measure the leads and compare to the datasheet. The one i...
  5. H

    Odicforce Boost Driver?

    I´m pretty sure it is a SX1308. Datasheet The upper right pin is FB connected between R1&R2. The one below is GND and the one on the buttom is SW1. On the left you have EN and IN connected to Vin. The one on the buttom is NC. The Pot is connected through NC and further below the IC to the lead...
  6. H

    Odicforce Boost Driver?

    Exactly. If you want to make it a CC driver, you have to modify it the way i posted before. For e real CC driver the number of diodes doesn´t matter. Once the current is set, it will remain there. No matter there are 6 or 9 diodes. Just the voltage will differ. The 1 Ohm resistor is there as...
  7. H

    Odicforce Boost Driver?

    I did a closer look to the pics at OdicForce and it looks to me like it is a simple CV boost driver based on the SX1308. By trying to reverse engeenering the circuit, I only found and additional resistor going from the pot to Vin. So if this is really a SX1308 based driver, there is no soft...
  8. H

    Hit by green laser

    When I was looking with my nightvision at the IR dots my DPSS lasers are producing, they all were well collimated and not fading out like many are saying. It´s also true IR encompasses a broad spectrum, but this laser is using a 808nm diode, so it´s very close to the visible spectrum and almost...
  9. H

    Hit by green laser

    Doesn´t make really sense, even if this would be just a 100mW laser. And it also doesn´t match the picture above. If it were just 100mW total and 60% would pass the glasses, the 60mW IR would burn his retina permamently. And for the camera it would also apear way brighter than on the picture as...
  10. H

    How to found the best divergence in a 532 nm 200 mW fixed focus module?

    You probably focused it to a pinpoint at this distance but not to infinite. Or you used a different collimating lens with a longer focal length, which gave you a bigger beam diameter and reduced the divergence.
  11. H

    Mitsubishi 500mW 638nm Build

    Where did I say something about expencive? Nowhere, Just the adding a cap at the outputs doesn´t work for these buck drivers. Been there and tried it already. The spikes where still there and the cap only changed the characteristics of the driver which caused even more noise. The cap trick only...
  12. H

    Mitsubishi 500mW 638nm Build

    This driver will most likely kill the diode as it´s causing little spikes while turning on. These are ok for 445nm diodes as those can handle these spikes but not with the Mustubishi diodes. I´m talking from experience because such a driver killed a few for me. You need a driver with a soft...
  13. H

    DIY Thermal LPM for under $50

    Gas lasers don´t require lenses, just perfectly aligned mirrors. There even exist TAE and DYE lasers with no mirrors at all. Laserdiodes are also having microscopic mirrors and operate in principal the same way like gas lasers. Just because the whole laser is microscopic it´s RAW output has a...
  14. H

    DIY Thermal LPM for under $50

    You are ignoring one simple rule. The universe is not a cube and it´s expanding all the time. therefore you will never get a absolute linear beam and the photons to have always the same distance to each other, even after passing a few billion years of space. The same for reducing this to be...
  15. H

    DIY Thermal LPM for under $50

    But you are measuring the voltage not the current. The current in this circuit is negligible. An yes, you can reach the phisical maximum and its different for every type of TEC. C is a constant but the space-time isn´t. Gravity for example is bending it and the light isn´t traveling in a...
  16. H

    DIY Thermal LPM for under $50

    Yeas, but there is no absolute linearity. Even photons are not traveling absolute linear through the spacetime. You only reach almost absolute linearity for a limited section. The same for this design. When you are using a TEC with a linear output, there is nothing to worry about but when using...
  17. H

    DIY Thermal LPM for under $50

    The TEC design and this circuit has been proven to work correctly, so I don´t get where the problem is. You are messuring voltage not current, so the voltage drop will be the same regardless you are soldering a resistor in parallel or not. To reduce the noise there is a capacitor. All you need...
  18. H

    DIY Thermal LPM for under $50

    Yes I know and my opamp is having it, so I need the pot when attaching a DMM or one of those LCD panels that need a separate powersource. Just this panel has a build in auto-zeroing to compensate such offsets and this is working really well. That´s why I replaced the previous panel I was using...
  19. H

    DIY Thermal LPM for under $50

    If he is using this LED voltmeter the zeroing isn´t needed. This pannel is zeroing itself and can be used with the same powersource. Just the ground needs to be attached directly to "-" but not the zeroing pot.
  20. H

    500mw mits: Will this driver work?

    Well I didn´t say all produced spikes but some of them did. This driver is also an exact same copy of the driver offered on DX.com and I don´t see any extra parts to prevent spikes. It´s like said it may work but if you get one that is producing spikes you also may kill the diode. So this is...




Top