J
John Larkin
Guest
On Sat, 04 Feb 2012 03:23:03 -0800, Hattori Hanzo
<OutintheSnow@billsbackyard.org> wrote:
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John Larkin, President Highland Technology Inc
www.highlandtechnology.com jlarkin at highlandtechnology dot com
Precision electronic instrumentation
Picosecond-resolution Digital Delay and Pulse generators
Custom timing and laser controllers
Photonics and fiberoptic TTL data links
VME analog, thermocouple, LVDT, synchro, tachometer
Multichannel arbitrary waveform generators
<OutintheSnow@billsbackyard.org> wrote:
Cool. How does it actually work?On Fri, 03 Feb 2012 19:17:51 -0800, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:
Do you own any LED flashlights? Open one up and see if there are any
resistors.
Mine are not the dumb versions. The switch, and control circuit is in
the tail. That means that it takes the 4.5 volts in and correctly
controls the feed to a single, super-bright LED with 3 distinct modes.
It is so well designed that when your batteries begin to avalanche,
the second mode no longer functions precisely as designed, signaling
the operator to use the first mode or third mode, but to also prepare to
replace or recharge your cells. The 'nose' end of the battery pack gets
applied directly to the LED. The circuit and equivalent limit resistance
presented to the virtual series circuit and LED and power source resides
in the tail of the lamp and is electronic. Bike riders use similar LED
drivers units in headlights that flash (tail lights too).
I know more about LED flashlights and bike lights than a "see if there
are any resistors" dope like you ever will.
--
John Larkin, President Highland Technology Inc
www.highlandtechnology.com jlarkin at highlandtechnology dot com
Precision electronic instrumentation
Picosecond-resolution Digital Delay and Pulse generators
Custom timing and laser controllers
Photonics and fiberoptic TTL data links
VME analog, thermocouple, LVDT, synchro, tachometer
Multichannel arbitrary waveform generators