Recent content by perfo

Got a reply from the company. £12 a laser and £40 delivery. So hmmm £65 (I need two) is too much for an experiment and I don't know if I can trust their label of class 1. The microwave things have turned up and darn sensitive things they are. I'm not sure if I'm getting false triggers or...

Wow thanks for the reply chaps.. I was thinking that maybe I'd asked a very stupid question and that's why no one had replied.. Good to know it wasn't :) A complication I'd not thought to mention. One side of the gate way is a building, so not prob with power and or mounting positions. The...

Hmmm must have upset someone I guess...

No views on this my lasing buddies ? I've found things lke this IR laser Module It states it is class 1 and 0.4mw so should be completely safe? Right? If I understand it right one of the problems of cheap red (or other colour) lasers are, they also give out IR and you don't really know the...

Hello all, I have a sort of safety type question to run past you… I have displays set up at Christmas and Halloween that require triggering when someone enters my gates, but not when they are leaving. I’ve tried a couple of things including PIR’s, ultra-sonics, IR LEDS etc with none really...

In the Uk I wouldn’t think beaming at the tower would be illegal. However, missing it and hitting an aeroplane or even a Blackhawk certainly would be…

Hey ... what's wrong with facebook moms ? :-) @Budsac ... Do you live near a military base? If you do then they may be upset about flashing lasers around and may have a black hawk flying past to have a loo see. Are you sure it is a telephone tower? No one is going to the expense of hovering...

Martt0. Imagine (and it may be true) there is a medical expert reading this thread and that expert has specialised in eye injuries caused by lasers. Even they would not be able to answer your question by looking at the picture of the label. I’m pretty sure they will tell you if you have any...

I haven't really a suggestion as to a laser (though lots of folks on here may have) I'd try a dirt cheap thing first whatever you can get locally. Getting 200meters is easily achievable but as I mentioned before , finding the dot on a moving boat may well be your problem a slight move up down...

Might be a silly question but can't you use the surface of the water to measure from? You have a ready built spirit level? A cheap laser can run for hours, as it purely depends on the size of the battery and the cooling which with a low power laser wouldn't be much. My experience (which isn't...

The problem being the shield don't come as standard and don't need to be used and the videos show a woman getting it out of her bag and etching an orange with no glasses or shields or anything. If you know what you are doing then you can use this thing quite safely but I think the audience it's...

Hello, I'd like to seek a few views about the product mentioned above called Laser Pecker.. There are video on you tube about it and it does seem a very useful gadget but isn't it an absolute disaster waiting to happen ? What if it falls over whilst engraving ? or someone plugs the power in with...

that's my problem as well. I keep thinking I should get a decent scope maybe even on of those that connect to the puter (why duplicate screens) but then I look at the bandwidths of the scopes and the price goes silly.... So all I have is a multi meter :)

Righty ho I shall dig about in the tech sheets. Any photodiode spring to mind as a good match for this type of thing ?

Cap across the supply to the little circuit ? Do I need to worry about constant current or any of that malarkey ? I suppose it would be ok to parallel LEDs providing I adjust the resistor value. That seems a nice simple (within my range) type of circuit . Thanks matey. What is the RONJA circuit...