Brightest LEDs on the planet?

[Alex Tsekenis]

And just to expand on Hero's post below, this is the topology of the ICs suggested earlier in this topic. You can google hysteretic LED driver for more info, Elektor Electronics (the magazine) published an article this year too.

By adding a resistor in the LED's path you can sense it's current and modily your duty cycle.

 

[Hero999]

The unregulated circuit in my previous post is based on the same topology as the circuits in the post before it.

The two regulated circuits I posted both work on the same principle: the output transistor turns on, as the current in the coil builds the voltage across the sense resistor exceeds a certain threshold, set by either a comparator or the conduction voltage of a base-emitter transistor junction, the output transistor turns off for a time determined by an RC time constant and the cycle repeats.

Here's an article which describes how the comparator circuit I posted works, see page 38.
http://ww1.microchip.com/downloads/en/DeviceDoc/41215C.pdf

You could use a discrete comparator if you like but it needs to be push-pull, if it's not i.e. it's LM311, LM393, use the circuit with a comparator above.

Note that the circuit contains an error: the +/- inputs are the wrong way round.

 

[The Master1]

Hi Folks,  hope this info is useful to someone.
I was searching for a similar item when I came across this LED unit.   It looks quite impressive however, it shows the LED's output in Candle power.
I'm contemplating adding two of these babys as driving lights..... low current high power, as used on various aircraft as landing lights.  Cool  eh........ or  what?

https://www.aircraftspruce.com/catalog/elpages/teledynelandinglight.php

   * Lamp Type: TIR Lens             * Bulb: PAR36                        * Product Technology: LED
   * Wattage: 30w                        * Voltage: 10.5V - 30V DC       * Rated Life: 5000hrs
   * Max Beam Candlepower (MBCP): 165,000                            * Maximum Overall Length (MOL): 2.75 inches
   * Bulb Diameter: 4.5 inches                                                    * Case Operating Temperature: 65

 

[mbalegria]

What brightest LED should i put in my Headlight motor?

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