18.5€ driver (first 20 drivers then reduced to 16€ to cover development and stock up parts)
+0.8€ double diode and input caps
+3.25€ Coilcraft XEL6060 inductor (for high output currents)
+0.5€ BLF Copper alloy spring
Shipping:
Worldwide
2€ <10mm 50g envelope priority air mail shipping worldwide
4€ for optional tracking insurance up to 25€
Soldered long phosphor bronze springs are possible, but it adds about 2.5€ shipping costs (EU more than world because of tax)
+2€ insurance per full 100€ insurance
Germany
1.3€ <10mm 50g
2.4€ thick
add 2.8€ for signed tracking + insurance up to 25€
Lexel, thanks for working on this. I hope a lot of people are interested. Richard, I believe, had an option for 3s input for 6v LEDs. Would that be doable here as well? I’d like to run an sst-70 at 6a with this and have 3 cells in series.
Because XHP35 build does not stress like a high current XHP50.2
so no need to put unnecessary parts on it that add costs
I have looked for a cheap coil for lower currents like XHP35 because 2.75€ plus tax vs 0.45€ plus tax makes a lot of difference
And stocking up Coilcraft inductors is quite expensive and may create overstock in the end
Sure the Input of 3S is possible, but the more voltage gap the higher are the losses on the schottki diode reducing the efficiency and create heat
If someone can hand me a proper Atmel Studio Project with firmware migrated possibly,
it makes no sense putting an MCU on it as I have no firmware for it
Would be nice to have also more PWM resolution as the buck chip has only one input to control it programmed for moonlight
I think the design is pretty much final
Next step order prototype boards and solder paste stencil
Then validating at least 2 prototypes with XHP35 setup and one that stresses the buck a lot like 3S to XHP50.2
I mean taking real advantage of the MCU features with code enhancing for example the PWM above the stupid low 8 bit
not just have 2 more output pins for 3 colors use in the D4V2
that 17mm build has one unused MCU pin anyway
IMHO 3 colors is the killer feature that 1634 brings.
Anyway, I know that Noctigon K1 has 10 bit PWM. And TK worked with loneoceans to enable that in his buck-boost driver.
I don’t think the code has been published yet though, at least a quick glance tells me that there’s no compile target for K1.
Will this be duplicated in either a 20 or 22mm package? I have an XHP50 light that I dearly love, but have been looking for a buck driver that will supply more than the 2.5-2.7 amps that the driver installed can deliver.