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I got a few diodes from DVD. I want to make a simple driver with TTL modulation. I know that the red diode need 2.5 volts, but the store I found lp2985 3 volts. I know that the diode current is important, but lp2985 may issue a maximum of 150ma. What should save diode from burn? lp2985 has...

on drivers often write frequency TTL. Example 30 or 50 kHz. But what does it mean? This frequency limit? Than it is limited? Such as laser printers or fiber lasers TTL frequency can reach megahertz. However, the driver there assembled on special chips.

We all know that there are drivers with modulation and without. But what is a modulation ? If we assume that this is a quick switch. We can not put it on the power supply, for the reason that the driver needs some time that would begin to work steadily . We do the same can not put the switch...

I have driver for blue laser. how to control the TTL? Initially, the laser lights. If close contact TTL it off. But I'm not sure what I should do. Post on ground TTL or apply +5 volts? (for that would turn off the laser) The laser is used to show and TTL flashes through it stronger or...

I'm novice at lasers. Foolishly, I bought a steel heat sink. I was excited and I rammed diode heat sink. All assembled. It works. After 15-20 seconds, it starts to warm up. I read the forums and see all the copper heat sink. I saw a table of thermal conductivity. But this theory. And I'm...