Easy to regulate output power and increase the beam light

Pros: potente haz láser . Práctico para uso en electrónica y experimentación. La potencia de salida parece superior a los 5 mw por el consumo eléctrico total.Consumo entre los 150 mA a 3 volt a casi los 200 mA. Es modulable y circuito de conmutación rápida para uso en modulación digital de datos.... Pros: potente haz láser . Práctico para uso en electrónica y experimentación. La potencia de salida parece superior a los 5 mw por el consumo eléctrico total.Consumo entre los 150 mA a 3 volt a casi los 200 mA. Es modulable y circuito de conmutación rápida para uso en modulación digital de datos. contras: la temperatura en uso es más bien elevada y necesitaria disipación. El haz abre en distancia corta a partir de 50 mt bastante, posiblemente cada módulo tenga su ajuste de lente interna para concentrar en haz o filtro de infrarrojo a verde un poco fuera del enfoque. Haz un poco inestable a veces con temperaturas de trabajo bajas. Cables de soldadura muy finos y delicados sobre el circuito impreso. En general un potente láser para experimentación. Read more

Pros: standard green laser, good output; Cons: narrow temperature window (see below), contacts separate easily. Overall, good product. Please note that these kind of lasers have very narrow working temperature window (20-25°C), same as with pen lasers. If you intend to use it outside, you must of... Pros: standard green laser, good output; Cons: narrow temperature window (see below), contacts separate easily. Overall, good product. Please note that these kind of lasers have very narrow working temperature window (20-25°C), same as with pen lasers. If you intend to use it outside, you must develop some kind of heating mechanism. Very easy is to solder multiple serial resistors, but you must also have some kind of temperature controller with measuring element. All in all, good for hobby projects, but this is just a component. You are expected to make housing, heating, etc. Read more

Good soldering, very bright, brass collimator. Thanks DX!

Не дорогой, работает отлично.

Pros: very bright. That's about all the pros, sorry... Cons: too bright, and no IR filtering! Be very very careful when using this laser, as it is NOT a 5mW laser, nor does it have any IR blocking filter. If you look into the beam of this thing, you WILL get eye damage faster then your eye can -... Pros: very bright. That's about all the pros, sorry... Cons: too bright, and no IR filtering! Be very very careful when using this laser, as it is NOT a 5mW laser, nor does it have any IR blocking filter. If you look into the beam of this thing, you WILL get eye damage faster then your eye can close - it's just a question of how severe damage, and if it will be permanent or not. Do NOT look towards the beam, nor at where you're pointing it if you're pointing it at something white close to you, and please, NOT towards anyone else. I've installed an IR filter on mine for safety, although i have not measured the IR com it, it for sure don't have a filter for it. Anotehr issue is temperature. I need to have it between 5c and 20c to work, this is a common issue on poor quality green lasers, and there's nothing one can do about it. For me it's not an issue cause i will use a temperature controlelr on it, but if you intend to use it as a laser pointer, the heat of your hand can make it shut down. The cables also come loose fast. In fast, 1 was already off when it arrived, but not hard to solder back on. Unfortunatly i have to give it 1 star on both quality and ease of use because of this. Read more

The beam really is very bright. Although I don't own an optical power measurement device, I'd say that it's putting out quite a bit more than the promised 5mW. As others have said, the wires are soldered quite badly onto the PCB and they let go quickly. The button is rather inconvenient too. But... The beam really is very bright. Although I don't own an optical power measurement device, I'd say that it's putting out quite a bit more than the promised 5mW. As others have said, the wires are soldered quite badly onto the PCB and they let go quickly. The button is rather inconvenient too. But since bare laser modules are meant for people with at least basic electronics and soldering skills, I don't think that will be a problem for anyone. These modules draw about 220mA from two fresh alkaline AA batteries in series. It's safe to assume they'll draw a bit more from a stabilised 3V voltage source, but I didn't try yet. Device offers great value for money. Read more

- Price - Power output - Construction - Driver circuit This laser module is cheap, in my country it's about 1/6 of common price. Power output is very good, beam can be easily seen in the city at night, very bright dot at day, even under quite strong sunshine. Did not measure the real output yet.... - Price - Power output - Construction - Driver circuit This laser module is cheap, in my country it's about 1/6 of common price. Power output is very good, beam can be easily seen in the city at night, very bright dot at day, even under quite strong sunshine. Did not measure the real output yet. Construction looks robust, but something rumbles inside - probably crystal piece (does not affect anything). Another "pro" is driver circuit, so you can just easily put it on 3V, and you're ready to go. - Absence of IR filter Actually is not that bad. I looked at the beam though my CCD "nightvision" (simply CCD chip with viewfinder from old camcorder in one line -_- ) with visible light filter applied in front of the laser, so only IR went thru. IR radiation looked to be quite small. - Very usefull stuff for many projects - best use in laser pointer. Read more

Well, it's green, is quite bright, focusable, and arrived in one piece -- a good start by all accounts. 250mA appears to be the correct draw for this item (see further comment in 'Cons' section however). I have an issue with the description of ALL the green laser modules, though this one to be on... Well, it's green, is quite bright, focusable, and arrived in one piece -- a good start by all accounts. 250mA appears to be the correct draw for this item (see further comment in 'Cons' section however). I have an issue with the description of ALL the green laser modules, though this one 'appears' to be on the money. If you look at the description to the other comparable modules such as SKU: 26891, you'll see that they all state 250mA as their current draw. I find this value hard to believe. Let me explain: How can a 200mW laser draw the same current as a module 40 times smaller?! In short, it can't. And I HIGHLY doubt they simply took the same PCB layout and swapped the resistors to suit the diode. If they did, the run time for all module powers would be the same as the most powerful one in this range. We know that not to be the case as the low powered modules, such as this one run for considerably longer. Moreover it's annoying because it means that in terms of telling whether it will fit your project, or indeed deciding what other components you're likely to need/order to accommodate it, you're none the wiser. All the pictures showing this range of modules are actually stock, in so much as they are the same module. Look at the resistor band colours. In short, I can't afford the time or money to have an item turn up only to find it's specification deviates 3 or 4 fold from what it was listed as. I realise this is just a little laser module off a Chinese site, and that I may have come across a bit OTT for something that is trivial. However DX might do well to remember that correct specs mean enthusiasts can make better, more informed decisions leading ultimately to a purchase. My point; as it stands, I'm going to have to look else where to find a site that can assure me and give me what I want. Read more

nice green laser , you can see it at night quite a nice price. but is is chinese quality so its a good idea to buy more than one! leads tend to drop of , so you need some soldering skills to make them work. i also thought that the button on the laser was a bit annoing. also its a bit of a shame a... nice green laser , you can see it at night quite a nice price. but is is chinese quality so its a good idea to buy more than one! leads tend to drop of , so you need some soldering skills to make them work. i also thought that the button on the laser was a bit annoing. also its a bit of a shame that its a 3 volt laser , it would have been nicer if it had been a 5 volt laser like the new wish , but the new wish broke quickly after overvoltage. Always be carfull , you should know what you are doing. and i thought it was handy to bypass the switch and put the laser on a pice of wood. that way you got a solid laser good quality price ratio Read more