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Thanks, ordered. Being constant voltage/current step down, what exactly the pwm modulation does? Changes the current only or both?

Guys, just to be clear, I'm currently, based in Indonesia, due to the current world situation, I would prefer to order something locally. My last order from the Singapore, took 2 months to arrive. So, checking the local market, found something, which could possibly work, as a temporarily...

Voltage no problem, I will be running the engraver off the 24v control board. Just tested the large transistor? with the multimeter, doesn't seem to be closed on any of the pads, the resistance in between the pads is close to Mohms. So, most likely the sot23-6 element one is shorted. Presume...

Red and black wires are to the fan. From what I understand, everything on the right, seems to do with the fan thermal control, not sure about the stc8g1k08a, perhaps the pwm/ttl control.

Soldered out the SS54 and the resistor, checked the diode, seems fine, voltage drop in one direction. The circuit remains shorted, with both unsoldered. Not that I know much about the electronics, but I presume, it's not the culprit then? Which element you called black lead? If the sot23-6 one...

Here's the product page: aliexpress.com/item/4001288147936.html Technical Parameters： Module Input：20-30W Optical power output：7.5W (7500mW) Wavelength：445-450nm Beam Shape：Dot (Focusable) Working Voltage：DC 12V TTL&PWM Modulation：YES, Compatible with Both TTL & PWM Modulation Input...

Applied 24v to the 12v module, and it shorted now, between plus ang ground. There's little information on this new module, but it says, optical power is around 7.5w. Want to ask, if there is possibly any alternative board with ttl/pwm control, which can be purchased or diy'ed.

Thanks, I'm willing to look for an alternative board, will probably post in boards section. Contacted the manufacturer, but have little hopes..

I suspect, it could be the sot 23-6 smd part, which is, most likely, some sort of voltage regulator. Sadly, no way to read the markings on it.

Accidentally applied 24v, instead of 12 and despite no magic blue smoke, it's dead now. The board's plus and ground are now shorted, when examined with multimeter. Visually, I don's see suspects. Which component is, most likely, quit working, guys?