Decent Chinese Driver

I've been experimenting with this driver quite a bit:

The output current is controllable by adding or removing resistance at this point. It comes with an R200 resistor. I've removed it on one and simply bridged it with solder and got 4.5 amps out of the driver with 8.4 volts. It got hot rather quickly so I thermal epoxied some aluminum chunks on and it worked fairly well. I don't think it would be feasible to go more than about 30 seconds at a time though.

I've also tried adding some other SMD resistors on top of the R200 (in parallel) to reduce the resistance. With just the R200 in place you get about 1 amp output. With an R250 on top of it I got right around 1.8 amps which is perfect for driving an M140. The M140 peaked at almost 2.2 watts without a lens on the LPM. The driver didn't even get hot at all.

Not a bad driver at all for the price!!!

Has anyone else tried these?

oh, they are very noise, i can hear the sound from them when connect with my testload, and i was kill some my PLPB450 cause it!

thanhtung said:

oh, they are very noise, i can hear the sound from them when connect with my testload, and i was kill some my PLPB450 cause it!

Click to expand...

That's very strange. Mine don't make any noise and they have a fairly constant output.

You REALLY shouldn't heat sink inductors, sir. Not only does it alter the inductance, it causes additional heat losses from eddy currents. If the inductor is getting too hot, you're doing something wrong.

Cyparagon said:

You REALLY shouldn't heat sink inductors, sir. Not only does it alter the inductance, it causes additional heat losses from eddy currents. If the inductor is getting too hot, you're doing something wrong.

Click to expand...

I'm over-driving the crap out of it, that's what I'm doing wrong... It was just for testing purposes. This driver isn't designed to run at that high of a current but I felt like pushing the limits.

Shmackitup said:

I've been experimenting with this driver quite a bit:

The output current is controllable by adding or removing resistance at this point. It comes with an R200 resistor. I've removed it on one and simply bridged it with solder and got 4.5 amps out of the driver with 8.4 volts. It got hot rather quickly so I thermal epoxied some aluminum chunks on and it worked fairly well. I don't think it would be feasible to go more than about 30 seconds at a time though.

I've also tried adding some other SMD resistors on top of the R200 (in parallel) to reduce the resistance. With just the R200 in place you get about 1 amp output. With an R250 on top of it I got right around 1.8 amps which is perfect for driving an M140. The M140 peaked at almost 2.2 watts without a lens on the LPM. The driver didn't even get hot at all.

Not a bad driver at all for the price!!!

Has anyone else tried these?

Click to expand...

Hi would this?
1W 1.6W 3W 445nm 447nm Laser Diode Drive Circuit Board Blue Drive | eBay
Be the same driver?
At default resistor what is the current at 7.4v
You said at R200 you get 1A output...
So is it when you add R250 resistor in parallel with it gets to 1.8a?
Or did you replace with R250
lol

Sak0ya said:

Hi would this?
1W 1.6W 3W 445nm 447nm Laser Diode Drive Circuit Board Blue Drive | eBay
Be the same driver?
At default resistor what is the current at 7.4v
You said at R200 you get 1A output...
So is it when you add R250 resistor in parallel with it gets to 1.8a?
Or did you replace with R250
lol

Click to expand...

Not having too many SMD resistors to play around with I parallel'd it.

Shmackitup said:

Not having too many SMD resistors to play around with I parallel'd it.

Click to expand...

I just bought some R250 smd and the driver hoping to try it out.

Sak0ya said:

I just bought some R250 smd and the driver hoping to try it out.

Click to expand...

I harvested mine from some LED drivers.

The title suggested something else... at any rate...

This is looks like a very interesting board. Having experimented with the Die4drivers board and another one I found at a parts shop in Yongsan electronics mall awhile back, this looks somewhat hackable...moddable
:thanks:

This driver is not suitable for the NDB7675. however Suitable for Sharp 350mw violet !.
I used Violet for a long time with this driver