Brilliant lightfooted, found the side emmitter in 2 minutes, !:)
Now i need reflective stuffs, preferebly both preshaped and also paint that i can use, im thinking of the high chrome stuff you see, or if any other ideas please ,
Ive not posted in a while.
I am looking to make my own led lights for a bike.unhappy that leds on cars and bikes are dazzling i wish to create a led lens or/and reflector. Learning that fillament light bulb car lights where blocked from front facing beam, ie they had to shine forward from a...
I am after some scientific information regarding laser beam strength degredation in air. I do not know whether anyone has any good information they could share please. Information on
Atomic saturation of the air
Electron scattering of the beam
General loss through the air
Plasma heating of air
It was my belief that the driver characteristics made the output current constant(within reason) no matter what the input current/voltage was. Recently having bought a driver that was rated at 5 to 35 volts and having tried it the output was Far beneath what was expected, this was sort of...
I see Mario. Liion are a good battery for discharge rate, charge holding, memory effect etc, i dont really see much more of a drain problem as compared to NIMH as drain between 3 aaa nimh is acceptable for most applications, I know there are higher drain occurences but for most applications they...
Well thanks for all the input. I didnt really think the discharge rate of the lithium thionylchloride was so low. But from a safety point Of view is cobalt any less dangerous or toxic than lithium ?
A d cell nimh is 170g and has 11wh, a lion battery is roughly half the weight and has 7.5 wh...
I put a thread asking for driver reccomendations a while ago to no sucess. What do you think to these ?
http://m.ebay.com/itm/3w-Constant-Current-Power-LED-driver-Input-3-6v-Output-700mA-with-2pcs-7135-IC-/111855113500?nav=SEARCH
These look like you select your resistors yourself
And...
Yep its got the coil, (-nduction coil)which i thought was needed to convert using the switching methOd. Its got the chip on it for the switching too. It is a buck by name.
I did wonder whether the metre was reading peak current and voltage on the way in ? Rather than the average.
Yep the sums...
Could some one check these calculations, as Ive bought yet another driver, and apparently its doing a resistor job and dissipating the surplus current.
Pre driver - 3.69v and 150ma giving 55.4 watts
Led side - 2.77v and 143ma giving 39.6 watts
Efficiency of 71 percent, which is basically...
Do you have any easy ebay or similar shop links to somewhere that sells to the uk in small quantities. Importantly it should have binning info on it. Dont know whats happened, all the ones i purchaced from before have disapeared and i can only confirm some are Q5 rated.
Help would be apreciated
well this tomo one needs initialising from a wall charger if all the batteries are taken/fall out. ive not tried this one
http://www.amazon.com/dp/B00IM3NZ86/?tag=cpf0b6-20
this one you can short badly, red and melted terminals, again not tried but its on the reviews ive read. it looked the...
I have seen the little charger boards, but as for the moulding for the case, wiring sockets and 2 diodes a battery it would be quite amaturish. I suppose i could canibalise and modify one i buy, but i was hopeing to just get one ready made. I am quite suprised i cant find one by nitecore actually
oDonees anyone know of an 18650 external battery bank/charger that's well built and comes with reverse polarity/low high volt protection etc. I cannot find one, all i can find is these on amazon.
http://www.amazon.com/gp/aw/s/ref=is_s?k=18650+battery+bank
Theyre either fragile or not...