Stan_Ham diode driver (analog)

[mophead]

Yeah, I have the schematic, it's in the first post but the built driver on a solderless breadboard has been disassembled for another project. Sorry.

If --*IF*-- I have enough time this weekend, I'll solder you one up and a strip of proto board.

What diode are you planning on using and what input voltage are you planning on?

[Elektrotechniker]

Yeah, I have the schematic, it's in the first post but the built driver on a solderless breadboard has been disassembled for another project. Sorry.

If --*IF*-- I have enough time this weekend, I'll solder you one up and a strip of proto board.

What diode are you planning on using and what input voltage are you planning on?

I was actually wanting to use this for 445 testing. So if you have time you gonna build it on a protoboard and draw a diagram ? That would be much appreciated.

[mophead]

Silvershot, fill out your profile....at least the state (or counrty) you live in.

It would be silly for me to build it up on a piece of stripboard from radio shack if you don't have a radio shack where you live.

I was going to make a few boards (just the drilled and etched pcb--no parts) up (with permission of course) and sell the ones i didn't need, but my schedule has allowed that yet.

Damn work interfering with hobby time thing........

[Elektrotechniker]

mophead, I live in Greece. We do not have radioshack here anymore. I do have stripboards. I just want a drawing on a single protoboard. if I want, I can etch a pcb to build the driver, I just wanted to built it on a protoboard first and learn how it works. Could you do that, draw a "noobie" diagram with the connections for a protoboard? Thanks.

Peter

[megaton]

mophead, I live in Greece. We do not have radioshack here anymore. I do have stripboards. I just want a drawing on a single protoboard. if I want, I can etch a pcb to build the driver, I just wanted to built it on a protoboard first and learn how it works. Could you do that, draw a "noobie" diagram with the connections for a protoboard? Thanks.

Peter

This is working on a 445nm

I hope this help
Greatings from Mexico

[Elektrotechniker]

I am having trouble finding the correct dimensions of the circuit i need to print. I have access to a laser printer next to my door but I don't know the correct size of the paper in order for the components to fit.. Mind giving me a hand with this please?
Thanks

EDIT: after some time i found the correct size. let me know if you guys need it

[mixedgas]

ok I know this is odd but if I wanted to run this with a -5v-0 mod input (-5 being full brightness) could I just invert the +/- on IC1A?

No, the loop would surge to max power.

You need a inverting opamp and that would be difficult to do on a single sided supply.




Steve

[Elektrotechniker]

A quick question: If I want to use a 445 diode, what will the value of the R16 resistor be?

[catalanjo]

No, the loop would surge to max power.

You need a inverting opamp and that would be difficult to do on a single sided supply.




Steve

Could try using an linear opto-coupler That only needs a single sided supply!

Cheers

[megaton]

Hi

The R16 is for the led not for the Laser
And that depend of your PSU and the led you use. (ie. For 6 Volts and standard led with 220 Ohms to 470 1/4W I think is OK)
And If you want your 445nm LD to go for more than 500mA approx. You must change R9 for less than 1 Ohm and go for more than 6 Volts.
I suggest you go for 12 Volts PSU and .33 Ohms 1 Watt and a heat sink for your transistor.
And adjust the current acordingly with that resistor.(ohms law).

Cheers,
Eduardo

A quick question: If I want to use a 445 diode, what will the value of the R16 resistor be?