200mw mains powered chinese laser? power adgustment?

[Draco]

does any one have experience with this laser? mine works fine i just would like to turn down the power for some applications. on the inside it has 2 adjustments one is for the tec and i don't know the other, i just got it so i don't want to be careless with it. it runs on 120-240 volts, has a tec with feed back but the damn maker sanded off the markings on the main semiconductors. now that i think about it i should have opted for analog control rather then ttl.
Right now i think i will cut some of the beam power with a prism

[Draco]

i have a second question regarding TTL control, grounding the line, does that blank the beam or does a logic high blank the beam?
it seems this hunk of crap is working backwards from what i know TTL to be, unless they sent me an analog controlled unit, that would be a plus

[mixedgas]

Chinese "TTL" lasers often need a NPN transistor to pull down their blanking input. Sometimes a HC series 74HC04 inverter will work, but usually the inverter needs to be a NPN with say 1K ohm in the base and 470 ohms in the collector to pull down the input. A quick test is to short the input to the laser's Ground via a low Cost Radio Shack 470 Ohm, 1/4th watt resistor. If the laser winks out, you need a pulldown. If the laser does not blank, check switch settings.

Steve

[Draco]

Thank you, it did blank when i grounded the line, right now i just built an adapter with a switch, i have the other parts and will build a circuit for that