Re: ttl modulation!
most diode lasers have a 2-pin connector for modulation (blanking or intensity).
these usually are wired to make the laser output a beam when they are disconnected, and turn the beam off when they are shorted together.
....but this is not directly compatible with the pangolin blanking signal, which outputs a 'high' of 5vdc to turn the beam on, and a 'low' of 0v to turn the beam off.
however, the fix is very easy. you just need to fit a 'shunt' resistor across the two modulation pins on the laser (which will cause the beam to turn off), and then connect the blanking signal wires (ILDA pin 3 +, and pin 16 0v) from the pangolin. the resistance of the shunt resistor can vary depending on the laser, but i find that a value between 1.2k (1200) and 1.5k (1500) ohms works fine.
a 0.25 or even 0.125 watt resistor is sufficient.
hope this helps....
