Just thought it would be interesting to share this.
I have a blue 1 W which has a driver that powers the laser (analog) and feeds the tec cooler.
For 1 W output i have to supply 5.75 Volts.
At the moment i use a 5 V power supply which can be adjusted +/- 5% with a potentiometer but this is not enough to supply the needed voltage.
Since i also have +12V and +/-24V availlable i thought of the following solution.
There is a dc - dc converter availlable for about 12 euros
Type number : OKR-T/6-W12-C
http://nl.mouser.com/ProductDetail/M...sBJ0tQnQ%3d%3d
I have 12 V and need 5,75 (V out)
According to the datasheet the formula is:
R trim (K ohm) = 1,182 / (V out - 0,591)
(5,75 - 0,591) = 5,159
R trim (K ohm) = 1,182 / 5,159 = 0,2291 K ohm = 229 ohm
So if i put two E24 resistors in parallel
240//4k7 = 228,3 ohm
240//5k6 = 230 ohm
This could be a solution to my needs.
Agreed? Suggestions?
Michel
Utrecht
Netherlands