# Lumintop FW3X Lume1

A BLF FW3A with a new driver from LoneOceans.  The new driver adds efficient
constant-current power regulation, RGB aux LEDs, and an upgraded temperature
sensor.

## Notes of interest

**Flashing firmware**:  The MOSI and MISO pin are swapped on PCBs dated 01/20,
compared to a Hanklight.  LoneOceans sent a fixed driver design (dated 06/20)
to Lumintop, but the new design didn't get produced.  So to flash firmware,
swap the wires for those two pins first.

**Fuses**: Lumintop seems to have shipped the FW3X with the wrong fuse values,
so it has the MCU severely underclocked and everything runs much slower than it
should.  Use [flash-tiny1634-fuses.sh](../../../bin/flash-tiny1634-fuses.sh) to
fix those fuse values and get it running at the correct speed.

**RGB mixup**: Lumintop seems to have swapped the wires for aux R and aux B.
This was fixed in firmware in 2023-12, but some lights were fixed in hardware
before that, so the firmware fix might cause the colors to be swapped again.

**Turbo**: The driver uses regulation for levels 1 to 149, and level 150 is a
direct-drive FET.  This is by design, and the FET cannot be ramped smoothly up
and down.  Turbo is a single level at the top of the ramp, with a big sudden
drop to the next level.

**Moon**: This light has a pretty bright preflash at moon level, and the
output is unstable so there is very visible ripple.  The user can either raise
the ramp floor to a level high enough to avoid these issues, or learn to live
with the ripple and preflash.

LoneOceans has some extra notes here, which mostly apply only to older versions
of the code: https://budgetlightforum.com/t/anduril-2/62656/531