9V BATTERY LED TORCH KIT

9 Volt Battery LED Torch Kit, retail AU$4.50 (US$ 4.05)* (http://www.ledsales.com.au...)
Manufactured by LEDsales (http://www.ledsales.com.au)
Last updated 05-17-09

* IMPORTANT: Pricing is accurate as of 02-06-08. Please visit the Currency Calculator for the latest currency conversion rates from Australian dollars to US dollars.






This is a kit that you assemble into a handy-dandy torch (flashlight) that is powered by a common 9 volt transistor radio battery.

The entire kit consists of:
  1. PCB (printed circuit board), measuring 25mm x 15mm
  2. 120ohm Resistor
  3. Slide switch
  4. Two battery contacts & terminal rivets for them
  5. One or two LEDs; high-intensity white furnished by default but you can ask for a number of different others when ordering
The kit is simple to assemble, requiring just a ~30 watt soldering iron with a relatively fine (small) tip, some rosin core solder, and a bit of your time. And if the LED color pisses you off, you can simply unsolder the old LED(s), and solder in new one(s). There's no warranty to worry about fouling up (well, no warranty that I know of anyway!) - this kit is very inexpensive (AU$4.50 (US$ 4.14)), so if it were to become damaged or even destroyed by an accident you had, you need not take out a second morgage on your home to purchase another.


SIZE



You'll first want to build the kit; this requires a small (~30 watt) soldering iron with a relatively fine (small) tip, rosin core solder, and the instructions right here (this is a PDF file; you'll need Adobe Acrobat installed in order to view it).

When the kit is finished, attach the unit to a 9 volt battery (see directly below), and then you can go and relax the embouchure - er - uh - I mean - go to town .

On one end of the unit, there is that tiny slide switch you installed a little while ago. As the unit is facing up and the switch is on the right, slide it toward you to turn the torch on.

Slide it away from you to turn the torch off.

There is no intermittent or momentary mode; please do not look for or expect to find one.



To change the battery in your torch, just unsnap the used 9 volt battery from the product, and dispose of or recycle the battery as you see fit.

On the underside of the product, look for a small metal cylinder and a larger metal cylinder with cuts in it. Orient the torch so that the smaller of the two metal cylinders is positioned over the larger of the two contacts on the top of a new (or used, such as from your smoke alarm) 9 volt battery (and vice versa), and press straight down until it snaps into place. There, that's it.

Measures 19.8mA on my DMM's 400mA scale - using the green LEDs that were installed when I received it.



This is an inexpensive kit that you assemble yourself, not a commercially-made torch (flashlight) with a metal or plastic case. So I won't throw it against the wall, stomp on it, try to drown it in the toylet bowl or the cistern, run over it, swing it against the concrete floor of a patio, use a ball peen hammer in order to bash it open to check it for candiosity, fire it from the cannoņata (I guess I've been watching the TV program "Viva Piņata" too much again - candiosity is usually checked with a scanner-type device on a platform with a large readout, a handheld wand that Langston Lickatoad uses, or a pack-of-cards-sized device that Fergy Fudgehog uses; and the cannoņata is only used to shoot piņatas to piņata parties away from picturesque Piņata Island), send it to the Daystrom Institute for additional analysis, or inflict upon it punishments that commercially-made torches (flashlights) may have inflicted upon them.
So this section of the 9 volt LED Torch Kit's web page will seem a bit more bare than this section of the web page on a page about a premade flashlight.

The torch I'm evaluating on this web page came to me preassembled with green LEDs - apparently my contact (L.T. of ATA) thought that I'd seen enough white LED torches - and you know, he may very well have been correct here...the green LEDs in this torch were a welcome diversion from the white LEDs in most other torches that I've evaluated as of late.

You can use either a new 9 volt transistor radio battery, or a used one from your smoke alarm - these used smoke alarm batteries often have an 80% charge still on them; no need to throw them away when they can power something like this until they're TRULY dead.

A pull-down menu on the kit's web page on www.ledsales.com.au allows you to choose the type of LEDs you want; you need not go elsewhere on the website to hunt them down.



Beam photograph on the test target at 12".
Measures 44,400mcd on a Meterman LM631 light meter.


Spectrographic plot
Spectrographic analysis of the LEDs in this torch (phlashlight).


Spectrographic plot
Same as above; newer spectrometer used.
USB2000 spectrometer graciously donated by P.L.



ProMetric analysis
Beam cross-sectional analysis (green LEDs).
Image made using the ProMetric System by Radiant Imaging.






TEST NOTES:
Test unit of this torch kit (preassembled) plus a number of LEDs in their feral state were sent by L.T. of www.ledsales.com.au and were received on the afternoon of 11-05-07.


UPDATE: 00-00-00



PROS:



CONS:



    MANUFACTURER: Sold by LEDsales, manufactured by you
    PRODUCT TYPE: LED torch (flashlight) kit
    LAMP TYPE: LED
    No. OF LAMPS: 1 or 2
    BEAM TYPE: Depends on LED(s) you choose; default white would be medium spot w/dimmer corona
    SWITCH TYPE: Slide on/off
    CASE MATERIAL: N/A
    BEZEL: None
    BATTERY: 9 volt transistor radio battery
    CURRENT CONSUMPTION: 19.8mA
    WATER RESISTANT: No
    SUBMERSIBLE: No
    WEIGHT: 50.0g without battery
    ACCESSORIES: PCB, 120ohm resistor, slide switch, LED(s), battery contacts plus rivets for them
    WARRANTY: Unknown/not stated

    PRODUCT RATING:

    Star Rating





9 Volt Battery LED Torch Kit * http://www.ledsales.com.au...






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