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Can you tell me what is TEC.

Can I use LDR connected to multimeter to measure resistance,then illuminate it with a laser.And increasing current to laser diode until resistance on LDR stops decreasing.I guess this should mean that laser diode no longer gives more output light.

But I dont have light power meter to measure output light power to calculate rate of change.I have today tested this unknown flat diode and he draw 150mA @ 2.5V.Diode is in very small factory heat sink and is not become warm.Now I do not know if this is the maximum current.I'm afraid to increase...

Hi, I have two flat laser diode with 3 pin.One is from 24X dvd burner.Other is from unknown xxX dvd burner.How do I know how much current can handle these two diodes. What is the operating voltage of this flat 3 pin diodes.Can according to their operating voltage to know how much current they...

Check your merged everything right.MC34063 behaves strangely if you chose the wrong coil and frequency.Find above post for calculation. In my latest project with blueray laser diode i used MC34063 to step down from 9V to 4.8V,@200mA. On image is that driver.

I have not say you all are wrong with current regulation.I only say that I use constant voltage as driver without any problems.How is see nobody use(dont like) constant voltage. And that some of you who are opposed to constant voltage try to test constant voltage driver and write your...

My diode have 300mW not 5W.I talk about my experience with constant voltage regulators.I have tested constant current drivers and have and I have not noticed any difference between.I prefer constant voltage because it is simple to make and is more efficiency(no sensing resistors). And if is so...

Yes.I dont know what is so heavy.Simply use lm1117 linear regulator and connect it in voltage regulation.Turn trimmer on lowest output voltage and connect laser diode(in heatsink).Then simply increase voltage and in same time monitor current.When I reach desired current for laser diode I stop...

In previous laser projects, I never used the constant current driver.I always(ultra) use constant voltage control (i.e. LM1117,MC34063).Because if is laser diode rated for example 3V @ 100mA,they will not pull more current if you apply 3V.Ofc. they will pull more current if heatsink is...

Look if you can dim led why not to dim laser diode.I never care about current regulation,I only care about maximal diode current.Good cooler resolve thermal runway so I dont need constant current driver.My problem is that I use 3x1.5v batteries (4.5V) to drive blue laser diode @ 4.8v.So I cant...

Hi, I meant to do this type of driver for my new projects.It is very simple and very efficient.With this driver you can regulate output power from 5-95%.So you can adjust power output for laser diode which she need.Just worries me what will happen if the batteries are for example discharged to...

I have buy same diode from this seller.I ask seller is it true that this diode operate @320mA.Seller say yes it operate @ 320mA.Can anyone confirm that this diode work @320mA.Because I do not want burn this diode.

If is so hard as you say I can lathe new host/heatsink for diode,crystal and lens.This laser pointer have only one crystal(glued on brass half ring).And one focusing lens.Crystal has light green color on his both ends.Dimensions of crystal are 1x1x3x milimeter. But I worry about crystal that...

Before I post here question I ask seller it is that true current for this diode.And he today correct value to 580mA(max 650). I have buy green laser pointer (10mW) and will extract old diode and insert my new 500mW diode.But can crystal handle 500mW of power? Which is efficiency of crystal?How...

Hi, i think to buy this 808nm,500mw laser diode from ebay.But I can not believe that laser diode of 500mW pull current of 350mA @ 2.2V. Is this appropriate for the current diode or is fake. I ask this because I use red laser diode that consume 500mA of current @ 3.2V for 300mW of power. p.s.I...

You can limit current on two ways.First and badly way to reconnect LM1117 to current regulation,but i dont know that trimmer can handle 1A.Second way is the best, put low value resistor between pin 6 and 7 on MC34063. Here is the calculator that calculate resistance for current resistor in...

MC34063 can work in current sense mode if you put low value resistor between pins 6 and 7.But I left out due to the greater efficiency.

Hi,this driver will not be interesting people who can buy special purpose driver for LD.This driver contains parts that are cheap and easily obtainable in the whole world.This driver will be interesting people who have only three battery(3.6v) or only single li-ion(3.7V) and cant find driver...

I have same problem 3.6V to 3V.I cant find any driver with so small voltage difference.So i build boost-buck converter.MC34063 boost 3.6V to 6V and LM1117 step down to 3V.

I use LM317.