Dual drivers, and new revision quad drivers in stock

[nuphotonix]

ok... Im at the point today where I will be driving the 650nm cmount laser. I am taking one channel of the quad driver parreleling the tec and the diode to the A and C connectors. Am I correct in thing this way given our current disscussion thread?

[Badpip]

You need to use two channels - one for the LD and one for the peltier...

Thomas

[Badpip]

[Double post removed]

[jammah]

Hi there
Im keen on one of the quads
I cannot remember if I have already sent PM so I will again
Cheers
James

[andy_con]

is there an electronic version of the manual anywhere?

[RGbee]

As much as i like the P3's Badpip's drive is much easier to set:
To set up current drive on these drivers connect an Amp meter directly to the outputs. Best to do it at 5V supply as it will heat up the FETs quite a bit.
1. Connect a 5v SMPSU to the input on the board
2. Adjust the bias to just below the lasing threshold of the LD
3. Apply 5v to the modulation input, then adjust the gain pot to the maximum current the ld can handle
Additional info:
Pads:
A-C = Anode-Cathode (Output) Anode = positive, Cathode = negative
M-G = Mod-Ground
V+ and _┴_ = Supply voltage
Input/Output pads have been changed to allow connectors to be mounted.
Ground plane changed a little to make it easier to solder the wires.
Testpads, so diode-current can also be measured with a diode connected.
Beam suppression redesigned to be more sensitive and slightly faster.
Jumpers replaced by a single solder-jumper to enable/disable beam suppression on all channels in one go.
Solder jumpers to parallel the inputs.
• Board is 48x63mm with 4mm mounting holes.
• Each channel has its own modulation input.
• 0-2A analog modulation + 0-0.5A bias for a total of 2.5A per channel.
• 5-24V Supply voltage

[robvdv]

Just a small +1 to Badpip's drivers. Mine arrived fine, was easy to configure and is driving my RGB laser fine. Thanks!

[planters]

I too have been very happy with these drivers and just ordered a couple more. Do we know what is the modulation frequency limit might be for say 0-90%/90%-0. Does the fidelity of modulation decrease with frequency? I'm sure it does with all drivers, but how much. I'm asking this because of the impending release of very high bandwidth scanners that might show limits that are not obvious at this time.

[Humphry]

Hey badpip, wanting to make a purchase, please PM me your email address.

Thanks!

[robvdv]

Hey badpip, wanting to make a purchase, please PM me your email address.

Thanks!

I need another too. Shall we share shipping?