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nope, it's just the way the circuit works.. Both use linear pots.

Hey guys, about the additional connection to the 471 resistor.. it does nothing. I just use it out of convenience because it's so close by. Look in the photo under the solder blob you'll see a lighter green trace running from that resistor to the exposed pad.. so connecting or not connecting...

I think if you keep it at 2-5 kHz it will be fine. At 10 kHz the pulses start to melt into each other and it won't turn off all the way between pulses.

3 would fit, 4 is questionable. 2 knife edged fit on scanners fine, 3 or 4 would be a question of how large your scanner mirrors are.

There are a few things that benefit the BoostDrive: It can be TTL modulated, it also can be switched on and off with a low current tactile switch. It has a sturdier potentiometer that allows for more adjustment cycles (the FlexDrive potentiometer is rated for about 15 adjustments max.) Also...

These go after the collimating lens. So you can knife edge two beams before sending them through this. The incoming beam should be collimated tightly, yes.

No, tiny FAC application on a canned diode isn't practical, and correcting only the fast axis on this diode after the collimator leaves you with a pretty bad beam due to the large slow axis emitter. These lenses take care of the axis that spreads at about 4mrad, and bring the beam into a...

All the details will be in the documentation with the lenses.

Bionic is right, it will output the set current for any diode load that is 2.2V to 5.5V, provided it's within the power envelope discussed in the manual.

thanks guys, fixed the title. Yes, a sketch will be forthcoming. Basically the concave lens is used to spread the slow axis and the convex lens is used to straighten it out.

The test units from the final manufacturer have arrived and check out good. They are broadband coated < 0.5% reflectivity. The final total losses including bk7 glass are 3%, vs an estimated 10% for prisms. <0.9 mrad emission is achievable with these (after an ashperic collimator) used to...

Yes, the beams exit to the left. I have the lenses adjusted (aixiz glass) so that at a distance the dot is square. So combining them this way just results in a brighter square. At close range it is more + like

Correct, I assume the purpose was to help the unit detect which type of disc was inserted. I didn't measure the losses directly, but the waste beams combined appeared to be <10% of the input power.

Hey guys, after a thorough search of going through sled parts looking for a PBS that could combine two 445 lasers without too much loss, I've found a good option. The PBS/Reflector combination that is mounted vertically, pointing up to the red read lens in the GGW-H20L and GBW-H10N is just...

Hi, there was a power outage over the weekend. I'll bring it back up in a few hours. Sorry about that!

Yes, that's what I mean. However (to others) I don't recommend doing that so you can reach 1200mA. 1200 might work for you, but it leaves no headroom for battery drain and it will give you very short run-times. Not to mention it's way past spec for the diode. Cheap-o thermal paste is...

Physicists and government 'accountants' are the only people who deal with numbers with that many zeros. The only difference - only the physicists care when things don't add up!

yep! more characters

Re: Dummy load for high current - 2A test load Hi Shin, your calculations are correct. When you use a 1 ohm resistor, at 1A that in itself gives a 1V drop! because of this, I've started using a 200 milliohm resistor in higher current test loads, instead of 1 ohm. Then, mA = mV * 5

The PWM does control the IC (on the other side), via that pad in the instructions.