As I mentioned, laser diodes are fragile devices. So the power supply must be adjusted before connecting any laser diode.
After all components are placed on PCB and visual inspection is finished, connect one 1.2K resistor in R4, R5 and R6 place. Power up the circuit. Check if linear regulator is working and we have stable […]
I've made some improvements to my laser PSU. I added voltage regulator, max voltage on open laser suppressor, spike suppressor. Also some useless improvements…
I didn't made new PCB, I tested modifications on old board. But all modifications I entered into Eagle software and traced PCB.
I think this “theoretical" PCB is good.
Main difference from old version: […]
I improved my laser PSU design: added voltage regulator, additional schottky diodes, some capacitors and it seams that laser supply is quite stable. I tested it with low power led lasers and several high power IR lasers from CDRW devices. Heat sink on the PCB is not mandatory. Only in rare cases, when powered from […]
My red laser stock was empty. Mainly due to my errors and experiments. As I didn't find spare DVD recorders, I switched to infrared lasers (IR). It is much easier to find powerful IR laser- the source is any CDROM recorder. In newer high speed CDRW devices, lasers are quite powerful.
IR laser beam is invisible. […]
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