From: jl@glen--canyon.com   
      
   On Fri, 26 Dec 2025 17:56:58 +0000, Cursitor Doom    
   wrote:   
      
   >Gentlemen (IOW not you, Bill),   
   >   
   >I've got a bunch of green laser diodes which are specified for 370mA   
   >current draw. I've been using a straight 5 ohm WW resistor rated at   
   >10W as a dummy load, but it's crude and inaccurate. Is there something   
   >better I should be using? I've got some 2W blue ones to do later on as   
   >well so something which could be adapted for those would be a plus.   
   >Ideally something which mimics the knee you get as it starts to   
   >conduct.   
   >   
   >Cheers,   
   >   
   >CD   
      
   Use a string of diodes, unless you plan to go really fast and the   
   capacitance hurts. A Vbe multiplier might work as a variable diode.   
      
   But a resistor should be OK if it hits the same operating point as the   
   laser.   
      
   Will your drive be DC or pulsed or pulsed fast?   
      
      
   John Larkin   
   Highland Tech Glen Canyon Design Center   
   Lunatic Fringe Electronics   
      
   --- SoupGate-DOS v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)