Buck or boost converter that ramps up and down

Macgravy

Newly Enlightened
Joined
Jun 13, 2019
Messages
25
Location
Southern California
Low-voltage halogen lamps are already designed to operate with direct current.
But there are types from the same manufacturer with different lifespans.

For example Osram 24V150W:
64640: 50 hours;
64641: 200 hours;
64642: 300 hours;

However, it is still true that the lifespan decreases if the lamps are operated with a little more than the nominal voltage, or increases if the voltage is lower.
Those hours, as stated in the Osram specifications, are life while operating on AC power not DC.
 

Starlight

Enlightened
Joined
May 25, 2002
Messages
678
Location
Florida
TaskLED has almost what I need, but their dimming boards aren't rated for enough amps for my lights.

I will be using either LiPo or SLA depending on which bulb I start with.

This project is all DC, no mains.

I found this. It allows external dimming, just not through the on/off switch.
https://www.ebay.com/itm/403926918657
 

sbj

Newly Enlightened
Joined
Feb 19, 2017
Messages
172
Macgravy said:
"Those hours, as stated in the Osram specifications, are life while operating on AC power not DC."

In practice, this doesn't actually make any difference because the effective value is always specified for AC.
 

yellow

Flashlight Enthusiast
Joined
Oct 31, 2002
Messages
4,624
Location
Baden.at
Somewhere You typed the ramp up time is not important,
so why is the ramp up feature together with the power button important?

If I guess: to fight initial "cold strike" :poof:ing?
... that already is "done" by using the converter.
With it there is enough "delay" to give the wire enough time to heat up.
(Even wegen we dont notice much of it)
 

Macgravy

Newly Enlightened
Joined
Jun 13, 2019
Messages
25
Location
Southern California
SBJ...who are you and why are you here interfering in this....you add nothing.

Starlight.....OK...here you go...no buck, no boost...get your batteries...12 volt or 2 in series for 24 volts......buy an appropriate sine wave inverter. (there are many cheap ones out there in the 500watt to 1Kwatt range)...feed that to a dimmer controller...then that goes to the appropriate transformer for the voltage of the halogen lamps that you are currently using...

simple...cheap...what am I missing....????? Other than your be using 120volts instead of a lower voltage right off the battery/boost or buck inverter....

I'm still trying to understand your requirements...Hopefully this will work for you...unless high voltage is something you really want to stay away from...????
 
Top