I've been thinking of getting a "magic resistor" constant current circuit done for a 9V 5-watter LS Hotlips-D package. Basically the circuit will allow the uninitiated to either put in either Alkalines, Lithiums or NiMhs and it will regulate the current to any set current, eg. 750mA, 1000mA, 1500mA, 2000mA or even up to 3A!! Adjustment is done via a 2mm screw driver and a multimeter is required. The circuit will automatically adjust the resistance to get the desired current, like a magic resistor.
When the battery voltage drops below the LED voltage, it will basically go to a a direct driven mode. At no time will the current exceed the preset current rating above. This way, there is no chance of blowing any LSs and the brightness will be constant until the battery starts to expires.
Just gazing interest to see if any progress (short run) should be made on this? /ubbthreads/images/graemlins/icon3.gif
======== T H E O F F E R S (Moved from my Aug 4 post. Updated 30 Aug) ========
MR-X with X3T binned 5 watt Luxeon (previously MR Hotlips TK)
There will be a small number of MR-X turnkey units for sale. These will indeed be very special lights. It will come in a 6AA configuration in an Ontario Aluminium D-sized body with a Direct Drive Indicator LED. It will be finished off with a UCL lens and a special X3T binned Luxeon. Pricing: $213 shipped and insured. You will need your own NiMh batteries (or Li-ion, L91, Alk).
MR Hotlips
MR Hotlips will be supplied will be supplied with the complete Magic Resistor circuit embedded in the Hotlips and siliconed in place. The Direct Drive Indicator LED Indicator will be soldered in for convenience and emitter wires ready for immediate installation. Then drop it into your OAD flashlight body, connect the power and you are ready to go. You can of course adjust your desired current setting using a 2mm flathead screwdriver. Price: $58+$5 (5 day delivery). A photo of this setup can be seen below (about the ~40th post).
(MR)
(MR) is just the bare Magic Resistor circuit with DDI LED. This is essentially the circuit before it is fitted into the Hotlips. Price: $38+$5 (5 day delivery).
The delivery of MR Hotlips and MR will be done after all TK orders have been fulfilled.
================================================
Again, I would like to thank Burnt_retina for his invaluable input, technical advice and putting up with my countless questions. Thanks Burnt. /ubbthreads/images/graemlins/bowdown.gif
Graph of the Magic Resistor set to 1.5A. 3x123s in Direct Drive
When the battery voltage drops below the LED voltage, it will basically go to a a direct driven mode. At no time will the current exceed the preset current rating above. This way, there is no chance of blowing any LSs and the brightness will be constant until the battery starts to expires.
Just gazing interest to see if any progress (short run) should be made on this? /ubbthreads/images/graemlins/icon3.gif
======== T H E O F F E R S (Moved from my Aug 4 post. Updated 30 Aug) ========
MR-X with X3T binned 5 watt Luxeon (previously MR Hotlips TK)
There will be a small number of MR-X turnkey units for sale. These will indeed be very special lights. It will come in a 6AA configuration in an Ontario Aluminium D-sized body with a Direct Drive Indicator LED. It will be finished off with a UCL lens and a special X3T binned Luxeon. Pricing: $213 shipped and insured. You will need your own NiMh batteries (or Li-ion, L91, Alk).
MR Hotlips
MR Hotlips will be supplied will be supplied with the complete Magic Resistor circuit embedded in the Hotlips and siliconed in place. The Direct Drive Indicator LED Indicator will be soldered in for convenience and emitter wires ready for immediate installation. Then drop it into your OAD flashlight body, connect the power and you are ready to go. You can of course adjust your desired current setting using a 2mm flathead screwdriver. Price: $58+$5 (5 day delivery). A photo of this setup can be seen below (about the ~40th post).
(MR)
(MR) is just the bare Magic Resistor circuit with DDI LED. This is essentially the circuit before it is fitted into the Hotlips. Price: $38+$5 (5 day delivery).
The delivery of MR Hotlips and MR will be done after all TK orders have been fulfilled.
================================================
Again, I would like to thank Burnt_retina for his invaluable input, technical advice and putting up with my countless questions. Thanks Burnt. /ubbthreads/images/graemlins/bowdown.gif
Graph of the Magic Resistor set to 1.5A. 3x123s in Direct Drive
