Barbarin
Flashlight Enthusiast
Being a manufacturer myself I'm near ashamed of showing what has been on my head during the last twelve months when caving... They were made on a hurry, but they worked so good that we haven't changed anything. They have been a kind of testing prototype, and the best we can say about them is that carbide users don't miss it when using this.
It is so simple that it does not need explanation, just a few data:
-1 Lux III TWAK. DD 3,6 V NiMH 4500 mA (small 0,20 ohm resistor added to keep current arround 900 mA.
-Diode is glued over copper disc. Lense is PC.
-Reflector is a IMS 27mm, sputtered to soften hotspot.
-Don't forget epoxi and polyurethane everywhere!
We made 10 pcs. for this expedition (http://empresas.servicios.retecal.es/rioseras/espeleobuceo/og_t1c.htm) , and no one failed. We have been lending them since them to many people, and no one has ever failed.
I think you can spend three hours or so to make it, and no more than 40 US$, and it will be brighter than a lot of commercial units.
Heat dissipation is quite good due to the big surfaces, but it was designed to work on caves, and temperature there is usually 10-16ºC, so it does help a lot.
A simple and reliable RCA female-male connector is used for ON-OFF.
Feel free to make any questions,
Javier
It is so simple that it does not need explanation, just a few data:
-1 Lux III TWAK. DD 3,6 V NiMH 4500 mA (small 0,20 ohm resistor added to keep current arround 900 mA.
-Diode is glued over copper disc. Lense is PC.
-Reflector is a IMS 27mm, sputtered to soften hotspot.
-Don't forget epoxi and polyurethane everywhere!
We made 10 pcs. for this expedition (http://empresas.servicios.retecal.es/rioseras/espeleobuceo/og_t1c.htm) , and no one failed. We have been lending them since them to many people, and no one has ever failed.
I think you can spend three hours or so to make it, and no more than 40 US$, and it will be brighter than a lot of commercial units.
Heat dissipation is quite good due to the big surfaces, but it was designed to work on caves, and temperature there is usually 10-16ºC, so it does help a lot.
A simple and reliable RCA female-male connector is used for ON-OFF.
Feel free to make any questions,
Javier
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