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Yes, I have seen many drivers on the LM317. But I was so naive, I thought that input ON/OFF (enable) some LDO can be used as TTL. And thus simplify and reduce the circuitry.

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.

Surprising. I connected to your circuit ATX power supply (at 5 post). At the output of the correct voltage. However, the laser does not react. (I connected only the X coordinate and Y is not connected, and modulation) I drives the DAC random values but do not stir Galve. Laser itself...

I tried to make myself bipolar powered by two of the accumulators at 12 V. Voltmeter showed -12 and +12 as expected. However, when I connect the battery to the circuit ADC glowed to red and his legs melted. :thinking:

Camvo, please tell me the name of the item on the input of the circuit? RC3, RC4 - this diode? What denomination? I can not see on the photo. You have to input AC or DC voltage?

Oh! Now I downloaded your PCB and I see that you are generating +/- 12volt. And I took on a power supply of the laser. Maybe that's the problem. Tomorrow I'll buy 7912 and 7812 and will try to copy your PCB. Thank you.

Hello camvo! I have a laser with ILDA input. I assembled from your circuit 5 post and connected to the Arduino. However, it works very strange, for the test I give to the DAC value 1000-2000-3000-4000 and get voltage 0.8, 1.7, 2.5, 3.6 volts. (voltage Arduino 3.6 volts) However, the...

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 think I can make myself a radiator. Take an ordinary piece (from computer or videocard) and drill a hole in it.

I had and bought it. but the seller is an asshole! sent without aluminum. (

I understand that. But I think it's better than air.

Well, I tested the 1000 ma. Does anyone know of an acceptable temperature of the diode? I think you can hang a temperature sensor and control it.

not safe for a laser or a man?

Inside the heat sink is empty. I filled the back thermal glue. What would the heat from the foot diode transmitted through glue to the body.

it looks like this. two lasers and two drivers and a battery cut will be attached on an aluminum disk the size of a CD. Disk is mounted on the motor shaft.

The fact that the laser is mounted on a rotational platform. It rotates at a speed of several thousand revolutions per minute (very quickly!). Thus the laser itself acts as a cooler. By the way this is not brass. I tried it nag rasp. Inside the metal-such as color.

cunning Chinese even erased marking the two circuits! :)

Not. it's china.

This lightes even though I do not submit 5 volts.