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Zephrant · 10/11/2017, 11:17 AM

I decided not to wait until the end of the month for my LED driver from China, so went back to my original plan. Cheap 24v x 1A wall wart, though a PWM box.
I re-wired the LEDs in to four strings of three LEDs each, and ran them in parallel to the PWM box.
I ran the power through a MM and marked off 100ma increments. This power supply will only do 1.1A max, so I can't quite get to full power at 300ma * 4, but close enough. I only intend to run them at 1/2 power or less anyway. I'm not confident I can properly cool them at full power, and they should last forever at 1/2 power.
Dimmer ($6): http://www.topledlight.com/dc-12v24v...ller_p308.html

Here they are at about 1/2 brightness.

And again at barely on:

This is the cheap AC transformer I got:

I'm not confident of the longevity of this setup- That's not an official current limited LED driver, so I might blow it using it this way. And I don't know how it's components will react to the PWM creating current spikes over time either. But I'll update this if I do blow it.

At the very least, it should last until my official LED driver comes in later.

10/11/2017, 11:17 AM	#9
Zephrant Premium Member Join Date: Mar 2002 Location: Spokane, WA Posts: 3,234	I decided not to wait until the end of the month for my LED driver from China, so went back to my original plan. Cheap 24v x 1A wall wart, though a PWM box. I re-wired the LEDs in to four strings of three LEDs each, and ran them in parallel to the PWM box. I ran the power through a MM and marked off 100ma increments. This power supply will only do 1.1A max, so I can't quite get to full power at 300ma * 4, but close enough. I only intend to run them at 1/2 power or less anyway. I'm not confident I can properly cool them at full power, and they should last forever at 1/2 power. Dimmer ($6): http://www.topledlight.com/dc-12v24v...ller_p308.html Here they are at about 1/2 brightness. And again at barely on: This is the cheap AC transformer I got: I'm not confident of the longevity of this setup- That's not an official current limited LED driver, so I might blow it using it this way. And I don't know how it's components will react to the PWM creating current spikes over time either. But I'll update this if I do blow it. At the very least, it should last until my official LED driver comes in later. Last edited by Zephrant; 10/11/2017 at 11:23 AM.