Dive Light Genie Electronics
The dive light genie is an advanced light dimmer and battery monitoring circuit for any kind of canister dive light, or for that matter any kind of light setup based around a 5 to 24 volt globe. Unlike some dimmers that waste the higher voltage by turning it into heat, the extra voltage through the use of advanced technology is saved by the dive light genie for use later on in your dive to extend the burn time of your light. This is only one of the many advantages that allows you to enjoy your dive for longer without worrying about when your light is going to fail. Other benefits are a more steady brightness, and constant color which is great for video and photography as the white balance won't change as much over the dive. You don't want the colors in your footage or shots to be inconsistent from the start of your dive to the photos/video taken at the end of the dive.
The dive light genie features a backup LED1 in case the main light source fails and a second LED2 or buzzer which will warn you of a low battery and acknowledge any button/switch presses. This buzzer can also be used to communicate with other people underwater as an added use as sound travels a lot further underwater than light can. The mounting of the piezo can effect how useful this feature is underwater.
The dive light genie also solves another problem related with using rechargeable batteries, this is a warning that the power in the batteries is about go flat. Normally, users of lights don't notice the gradual dimming of the dive light until its too late and battery damage has already begun to occur. The dive light genie will give some warning for you to find your buddy/surface or to have your backup light at the ready. The genie also features battery monitoring to protect from over discharge, which in an unprotected battery will reduce is life and capacity. Yet another way the dive light genie will ensure your light burns for the longest possible time as a damaged battery will not last as long.
If you need further time you also have the choice to dim the light to 50% (half brightness) for example to double the burn time of your light at any point of time during your dive. This is like being able to take out your 50 watt globe and put a 25 watt globe at any time during a dive! 25% dimming can also used for use above water to slow down overheating for lights that need to be used only underwater, as part of the low battery warning, or anywhere a soft low level of light is needed like checking gauges at a deco stop.
To protect the globe and lower failure rates of the globe at turn on, the power to the light is ramped up (soft start) and 25% dimming can be used to preheat the filament to prevent a cold globe from being damaged by high voltages if your overdriving the light. Globe filaments will break just like a cold glass will when hot water is poured into the cold glass, a short 25% dim at the start of your dive will greatly reduce if not prevent this from occurring.
Connect the battery to the board, the LED2 or buzzer which ever one you chose to use will turn on for around 1 second to indicate power is applied. Then if the battery is not low the LED1 will remain on and the LED2/buzzer will go out. It will remain in this state until you activate the switch. NOTE. Because a torch with a big globe gets very hot its critical that you only connect the battery just before going on a dive. Never connect it before hand because if the light turns on accidentally the light will get very hot and can easily melt and damage nearby gear and possibly cause a fire. The same applies when you have finished your dive, remove the battery when the light will not be used any more.
The switch then triggers the LED2/buzzer when the contacts are closed to give you an indication the switch was triggered and also to allow you to send basic signals underwater. The light will change levels in reaction to button pushes in a similar fashion to a touch lamp, ie first push is low then medium and then high, the next switch trigger will turn the light off again and the cycle can be repeated over and over.
Battery Protection can be difficult to grasp before you have actually used a dive light genie as it has multiple stage warnings to ensure that you don't forget the battery is getting low. As the dive light genie extends your burn time dramatically, this puts all of the low warnings past where the same light without a D.L Genie fitted would have already gone flat.
Ordering is very simple, just pay via paypal using the below 'pay now' buttons if your not in Australia, or if you are then email me for direct deposit details.
I also need to know the following information before I can send out the dive light genie kit.
'Dive Light Genie' dimmer for HALOGEN based lights (can be made for HID on request)
Premade Dive Light Genies are available now, as well as the kits that I offer for those who can solder and wish to provide the labour to assemble the units..
These parts will need to be purchased in addition to the kit which only includes 2 parts and a pcb, see pictures in next section for more info. The reason for this is to keep postage costs down and also some people dont want a buzzer or wish to choose their own LED color.
To work out the resistor colors use this helpful link 5 band Resistor Color Code Calculator
Blue LED backup light