I'm mucking about making an adaptor to allow older Makita 18v kit to run on newer Makita lithium batts.
Bought an LXT torch and set about it. Inside I was a bit surprised to find a small pcb. About 8 resistors, a capacitor and another component with a hole thru middle.
I'll try to get a pic up but in meantime anyone care to speculate on it's purpose?
?Soft start to prolong torch bulb life??
TIA
Jim K
Probably an inductor, and being used as part of oscillation cct
Would need picture to confirm
/Probably an inductor, and being used as part of oscillation cct /q
Excuse my ignorance, but why would you put one of those in an 18v non-led battery powered torch?
Thanks
Jim K
Probably bulb different voltage to batteries.
NT
Torches often have DC-DC converters to adjust voltage, but it needs a few more bits than that AIUI. No transistors?
Is there an unexplained black blob of plastic on the PCB? About 6 - 10mm square or circular. If so, that's hiding the active bit of a SMPS. The coil and the capacitor are the only bits that are too big to mount on the chip.
There'll be a tiny surface mounted IC, or maybe one under a black blob.
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